203,389 research outputs found
Corrigenda: Short M, Huynh C (2013) Four new species of Unixenus Jones, 1944 (Diplopoda, Penicillata, Polyxenida) from Australia. ZooKeys 278: 75–90, doi: 10.3897/zookeys.278.4765
No full textCorrigenda: Short M, Huynh C (2013) Four new species of Unixenus Jones, 1944 (Diplopoda, Penicillata, Polyxenida) from Australia. ZooKeys 278: 75–90, doi: 10.3897/zookeys.278.476
Corrigenda: Short M, Huynh C (2013) Four new species of Unixenus Jones, 1944 (Diplopoda, Penicillata, Polyxenida) from Australia. ZooKeys 278: 75–90, doi: 10.3897/zookeys.278.4765
No full textCorrigenda: Short M, Huynh C (2013) Four new species of Unixenus Jones, 1944 (Diplopoda, Penicillata, Polyxenida) from Australia. ZooKeys 278: 75–90, doi: 10.3897/zookeys.278.476
Monographis condorensis Huynh 2020, new species
No full textMonographis condorensis new species Fig. 11–16 Material examined: Type specimens. Adult ♂ holotype (QMS 109020), 2 adult ♂ paratypes (QMS 109021–22), 5 adult ♀ paratypes (QMS 109023–27) from Vietnam, Ba Ria-Vung Tau Province, Con Dao Islands, Con Son Island, leaf litter from So Ray old fruit plantation, 8.691263°N, 106.588949°E, elevation 223 m; on 25th July 2015 (collected by C. Huynh). Diagnosis: Differs from congeners in having dense, long trichomes. Body length over 3.5 mm. Antennomere VI with 24–29 sensilla forming a triangular shape, setiform sensillum located in the anterior position, conical sensillum absent. Labrum asetose smooth, with long slender setae in the anterior margin. Telotarsus with posterior lateral process shorter than half length of the claw, anterior lateral process and lamella process present, anterior setiform process longer than the claw. Description: Colour and trichome patterns dark grey on both sides with contrasting light green medial band on dorsal surface of the body. Body covered with dense, long trichomes. Caudal bundle black-silver (Fig. 11). Holotype male body 3.5 mm; paratypes: males 3.5–3.6 mm, females 3.8–4.5 mm; caudal bundle in both sexes same length (0.9 mm). Head: Each side 8 ommatidia: 4 dorsal, 4 lateral (1 anterior, 2 medial and 1 posterior). Vertex with 2 posterior trichome groups and a large medial gap. Each group with 2 rows: Anterior row curved slightly, on an oblique angle with large trichome sockets in central position, gradually reducing the size at both ends; posterior row with large sockets; a narrow medial space between these rows. Holotype posterior trichome groups with 18 sockets (L) and 19 (R) sockets in anterior rows, posterior rows with 5 sockets both sides (Fig. 12A) (Paratypes showed that variation is common in this species, regardless of sex, ranging from 14–22 sockets in anterior rows, 2–6 in posterior rows). Trichobothria typically thin, sensory hairs with narrow cylindrical funicles; trichobothria equal in socket size forming an isosceles triangle with equal distance ab and bc (Figs.12E and 13A) (trichobothrium a located in posterior position of the head capsule, trichobothrium b in lateral position, trichobothrium c in anterior position). Antennae: Eight antennomeres, 4 sensory cones, typical characteristics of Polyxenidae. Antennomere VI with 24–29 bacilliform sensilla (Figs. 14A, B and C). Holotype with 26 bacilliform sensilla forming a triangular shape (3 thick and 23 thin bacilliform sensilla), setiform sensillum located in anterior position, conical sensillum absent. Antennomere VII with 2 thick bacilliform sensilla (T, Ta and Tp), setiform sensillum (s) located in between these two sensilla (T), conical sensillum (c) located next to Tp (Figs. 15A and B). Clypeo-labrum: Holotype, labrum posterior margin with 10 setae, setae equal in length to labrum width (Setae on the paratypes ranged from 10–11 in both sexes). Labrum surface smooth and asetose, labrum posterior margin has a row of minute backward-pointing setae. Lateral lamella and single broad lamella each side median cleft, 20 slender setae, pair at the base, present on anterior margin of each side of labrum (Fig. 12G) (The number of these anterior slender setae varies among paratypes, ranging from 18–24 on each side. (Fig.13C)). Gnathochilarium: Lateral palp 1.25 times medial palp; 11 conical sensilla on the lateral palp and 22 on the medial palp. Same in holotype and paratypes (Figs. 12F and 13D). Trunk: Body with 10 tergites, 9 pleural projections, and a telson excluding caudal bundle. 13 pairs of legs. Collum (tergite 1) with lateral protuberances 4–6 trichome sockets each side. Other tergites with pair of pleural projections located in anterolateral positions. The tergal trichome socket arrangements typically have 2 broad oval shapes, slightly enlarged in lateral position, with the posterior row straight slightly to the centre, an intermedial gap between these rows (Figs. 12C and 13B). Holotype, collum with 73 sockets each side, lateral protuberance 5 (L) and 4 (R) sockets (Fig.12B) (Paratypes ranged 65–78 sockets in the collum and lateral protuberances 4–6 sockets). Tergite 2 had a similar structural pattern with the posterior row slightly longer and 73 (L) and 71 (R) trichome sockets (Fig.12C), the patterns are similar to characteristic large gaps. Tergite 10 is the exception with these trichome sockets being smaller and denser, a narrow space exists between the lateral rosette trichome sockets and posterior row. Trichome sockets of this tergite are over 100 and the tergite 10 of the holotype was counted 115 (L) and 112 (R) sockets (Fig.12D). Legs: Leg segmentation following Manton (1956). Legs 1 and 2 without trochanter, leg 1 without tarsus 1. Chaetotaxy (setae on leg articles): coxa 1 and 2: 2 setae, coxae 3–13: 2–4 setae; pre-femur, post-femur, tibia with 1 seta, except femur with 1–4 setae, tarsus 1 and 2 with a spine (Fig. 16A). Coxa, pre-femur and femur with biarticulated seta and ridged funicle (Fig.16B). 1–3 smaller biarticulated setae in posterior position of femur, some also on penis (Fig. 16C). Post-femur and tibia distally with setiform seta (Fig. 16D). The spine on tarsus 2 is sharply pointed and twice as long as (Fig.16F) the spine in the antero-sternal position of tarsus 1 (Fig. 16E). There 4 spines in tarsus 1 from the holotype. The posterior edge of the last sternite had 4 setae similar to those present on the coxa and the number of these setae are the same in the holotype and paratypes. Telotarsus-Claw: Claw slender with anterior lateral process and posterior lateral process less than half length of the claw; the anterior setiform process is longer than the claw; lamella process is present (Fig. 16G). Sex organs in the male: A pair of penes on coxae 2 and 2 pairs of coxal glands are located on the 8th–9th coxal plates. Telson: Dorsal ornamental trichome sockets symmetrically arranged on both sides of telson; 25 (L) and 29 (R) sockets of trichomes a on each side of the telson in the holotype (paratypes with 14–29). Trichome a sockets form 2 rows, top row with small sockets, bottom row with larger sockets. Socket of trichome b and 3 large sockets trichomes c with protruding base: c1, c2 and c3, forming triangular shape located in ventroposterior positions in each arrangement. Circular indentation d apparent each side near the exterior side of trichomes c (Fig. 12H). Caudal bundles: Similar to congener (Huynh & Veenstra 2015, 2018c) (Fig. 13E) and is classified as the caudal bundle type I arrangement (Condé & Nguyen Duy-Jacquemin, 2008). Caudal trichomes with a series of 2–6 backward hooks. Remarks: Monographis condorensis n. sp. has a longer body, with dense, long trichomes that are dark grey, which differs from the yellowish-brown colour seen in live specimens of other Monographis species. The number of sensilla (24–29) on the antennomere VI also differs from congeners that have fewer sensilla (12–20 (Nguyen Duy- Jacquemin and Condé, 1967)) forming a triangular shape. A row of the slender setae present on lamellae along the anterior margin of the labrum. Morphological and genetic differences indicate that M. condorensis is a new species. An updated diagnosis of genus Monographis is also required based on the morphology of all described species. The arrangement of the sensilla on antennomere VI divides Monographis into 2 groups: 1) forming a crescent shape and 2) triangular shape (Huynh & Veenstra, 2018c). Monographis condorensis n. sp. belongs to group 2 with sensilla arranged in a triangular shape, which is found in M. dongnaiensis, M. queenslandica, M. tamoyoensis and M. yunnanensis (Huynh & Veenstra, 2015). The differences between M. condorensis n. sp. and other species in the group are the presence of setae on lamellae along the anterior margin of labrum, which is a character absent in the group; a large number of sensilla on antennomere VI (>24 sensilla) and the claw structure (the claw is slender in structure with a shorter posterior lateral process, and the anterior setiform process is longer than the claw). All these characteristics make M. condorensis a distinctively new species in Monographis. Etymology: The name of Monographis condorensis refers to the old name of Con Dao Archipelago as Pulo Condore in southeast Vietnam, where this species was first found.Published as part of Huynh, Cuong, 2020, Three new species of penicillate millipedes from the Con Dao Islands of southeast Vietnam (Diplopoda, Lophoproctidae and Polyxenidae), pp. 1-30 in Zootaxa 4759 (1) on pages 14-18, DOI: 10.11646/zootaxa.4759.1.1, http://zenodo.org/record/373585
A Personalized Framework for Trust Assessment
No full textThe number of computational trust models has been increasing quickly in recent years yet their applications for automating trust evaluation are still limited. The main obstacle is the difficulties in selecting a suitable trust model and adapting it for particular trust modeling requirements, which varies greatly due to the subjectivity of human trust. The Personalized Trust Framework (PTF) presented in this paper aims to address this problem by providing a mechanism for human users to capture their trust evaluation process in order for it to be replicated by computers. In more details, a user can specify how he selects a trust model based on information about the subject whose trustworthiness he needs to evaluate and how that trust model is configured. This trust evaluation process is then automated by the PTF making use of the trust models flexibly plugged into the PTF by the user. By so doing, the PTF enable users reuse and personalize existing trust models to suit their requirements without having to reprogram those models
Scalable and Robust Dual-Primal Newton–Krylov Deluxe Solvers for Cardiac Electrophysiology with Biophysical Ionic Models
No full textThe focus of this work is to provide an extensive numerical study of the parallel efficiency and robustness of a staggered dual-primal Newton-Krylov deluxe solver for implicit time discretizations of the Bidomain model. This model describes the propagation of the electrical impulse in the cardiac tissue, by means of a system of parabolic reaction-diffusion partial differential equations. This system is coupled to a system of ordinary differential equations, modeling the ionic currents dynamics. A staggered approach is employed for the solution of a fully implicit time discretization of the problem, where the two systems are solved successively. The arising nonlinear algebraic system is solved with a Newton-Krylov approach, preconditioned by a dual-primal Domain Decomposition algorithm in order to improve convergence. The theoretical analysis and numerical validation of this strategy has been carried out in Huynh et al. (SIAM J. Sci. Comput. 44, B224-B249, 2022) considering only simple ionic models. This paper extends this study to include more complex biophysical ionic models, as well as the presence of ischemic regions, described mathematically by heterogeneous diffusion coefficients with possible discontinuities between subregions. The results of several numerical experiments show robustness and scalability of the proposed parallel solver
Automating Trust Evaluation for Ensuring Information Quality
No full textModern warfare's situation awareness and operation planning requires analyzing a vast amount of information, ranging broadly from intelligence reports to data from autonomous sensors. Correctly assessing the credibility of such information in a timely manner is as crucial to decision making as being able to obtain the information in the first place. However, manual information quality assessment is time-consuming and laborious, especially considering the amount of information that modern automated knowledge solutions can deliver. In this paper, we present a novel trust framework called the Personalized Trust Framework (PTF), which can assist military analysts to automate their trust evaluation process, and, as a result, significantly lighten the burden of information quality assessment. In other words, it provides a mechanism for end users to capture their trust reasoning in order for it to be automated by computers. In particulars, a user can specify how he selects a trust model based on information about the subject whose trustworthiness he needs to evaluate and how that trust model is configured. This trust evaluation process is then automated by the PTF making use of the trust models that can be flexibly plugged into the PTF by the user. By so doing, the PTF enable users to reuse and to personalize existing trust models to suit their requirements without having to reprogram them. Finally, this paper demonstrates a simple application of the PTF in automated credibility evaluation to ensure information quality
Monographis tamdaoensis Huynh 2022, new species
No full textMonographis tamdaoensis new species Figures 13–17 Material examined: Holotype, adult male (IEBR-Myr 989) and paratypes: Adult, two males (IEBR-Myr 990) two females (IEBR-Myr 991) and, two subadults with 12 pairs of legs (IEBR-Myr 992) were collected from Tam Dao National Park, 21.458611N, 105.649444E, elevation 1017 m, Vinh Phuc Province, northern Vietnam. All types were deposited in the Institute of Ecology and Biological Resources, Vietnam. Specimens were collected by author CH in the field trip organised by Dr Duc Anh Nguyen, on 17 th July 2017. Diagnosis: Body length 2.4–3.2 mm. Antennal article VI with 16–18 bacilliform sensilla forming crescent shape, setiform sensillum located in anterior position, conical sensillum present near centre of crescent. Labrum asetose, long slender anterior setae in anterior margin. Telotarsus with posterior lateral process shorter than half-length of claw, anterior lateral and lamella processes present, anterior setiform process shorter than half-length of claw. Description: Holotype male body 2.4 mm; paratypes: males 2.2–2.4 mm, females 3.0– 3.2 mm; caudal bundle 0.5 mm, nest trichomes 0.2 mm. Head: Arrangement of post vertex trichomes as for Monographis cattienensis with the holotype having 13 sockets (L) and 14 (R) in anterior rows, posterior rows with 3 sockets on both sides (Figures 13A & 13B). Paratype showed anterior rows with 12–14 sockets, posterior rows with 2–3 sockets (Figure 16A). Clypeo-labrum: Holotype, labrum posterior margin with 8 setae (Se), these setae longer in length than labrum width (paratype with 8–10 setae). Labrum surface asetose (l), labrum posterior margin has a row of minute backward-pointing setae (sb). Lateral lamella (Ll) and single broad lamella each side median cleft (mc), 12–14 slender setae (sa) present on anterior margin of labrum (Figures 13C & 16D). Antennae: Antennal article VI with 16–18 bacilliform sensilla. Holotype with 16 bacilliform sensilla forming a crescent shape with 3 thick (T), 9 thin bacilliform sensilla (t) and 4 medium-length thin bacilliform sensilla (tm), setiform sensillum (S) located in anterior position, conical sensillum (C) present near centre of crescent (Figures 14C, 17B &17C). Telotarsus: Claw slender, posterior lateral process (p) shorter than half-length of claw, anterior lateral (a) and lamella processes (la) present, anterior setiform process (s) less than half-length of claw (c). (Figures 15B & 17D). Telson: Arrangement of dorsal ornamental trichome sockets similar to M. cattienensis with 17 sockets of trichomes a left side and 18 sockets on right side of the telson in the holotype (paratype with 16–18 sockets). (Figure 15C). Remarks: Monographis tamdaoensis sp. n. is distinguished from congeners in its labrum structures and anterior setiform process equal to half-length of claw. Etymology: Monographis tamdaoensis is named after Tam Dao National Park in Vinh Phuc Province, Vietnam.Published as part of Huynh, Cuong, 2022, Four new species of Monographis Attems, 1907 (Diplopoda, Polyxenida, Polyxenidae) from Vietnam, pp. 393-420 in Zootaxa 5214 (3) on pages 407-409, DOI: 10.11646/zootaxa.5214.3.4, http://zenodo.org/record/738926
Monographis thatsonensis Huynh 2022, new species
No full textMonographis thatsonensis new species Figures 2, 18–23 Material examined: Holotype, adult male (IEBR-Myr 993) and paratypes: Adult, two males (IEBR-Myr 994) two females (IEBR-Myr 995) and subadults, three females with 12 pairs of legs (IEBR-Myr 996) were collected from Cam Mountain, 10.496944N, 104.981389E; elevation 662 m, in the Seven Mountain Ranges (That Son), located in Tri Ton and Tinh Bien districts, An Giang Province, Vietnam. All types were deposited in the Institute of Ecology and Biological Resources, Vietnam. Specimens were collected by author CH on 8 th July 2017. Diagnosis: Body length 2.0–3.0 mm. Antennal article VI with 15–16 bacilliform sensilla forming crescent shape, setiform sensillum located in anterior position, conical sensillum present near centre of crescent. Labrum asetose, long slender anterior setae on anterior margin. Telotarsus with anterior and posterior lateral processes equal in length and shorter than half-length of claw, lamella processes present, anterior setiform process longer than claw. Description: Holotype male body 2.0 mm; paratypes: males 2.0– 2.2 mm, females 2.4–3.0 mm; caudal bundle 0.5 mm, nest trichomes 0.2 mm. Head: Arrangement of post vertex trichomes as for Monographis cattienensis with the holotype having 12 sockets on both sides in anterior rows, posterior rows with 4 sockets (L) and 3 sockets (R) (Figures 18A & 18B, 22A). Paratype showed anterior rows with 12–16 sockets, posterior rows with 3–4, these setae shorter in length than labrum width (Paratype with 8–10 setae). Clypeo-labrum: Holotype, labrum surface asetose (l), labrum posterior margin has a row of minute backward-pointing setae (sb). Lateral lamella (Ll) and single broad lamella each side median cleft (mc), 12 (L) and 8 (R) slender setae (sa) present on anterior margin of labrum (Figures 18C & 22C & 22D). Antennae: Antennal article VI with 15–16 bacilliform sensilla. Holotype with 15 bacilliform sensilla forming a crescent shape with 3 thick (T), 3 thin bacilliform sensilla (t), 3 medium-length thin bacilliform sensilla (tm), and 6 short thin bacilliform sensilla (ts), setiform sensillum (S) located in anterior position, conical sensillum (C) present near centre of crescent (Figures 19C, 21B & 21D). Telotarsus: Claw slender, anterior (a) and posterior lateral (p) processes equal in length and shorter than halflength of claw (c), lamella processes (la) present, anterior setiform process (s) longer than claw (Figures 20B & 23D). Telson: Arrangement of dorsal ornamental trichome sockets similar to M. cattienensis with 14 trichome sockets a left side and 15 sockets on right side of the telson in the holotype (paratype with 14–18 sockets). (Figures 20C, 23A & 23B). Remarks: Monographis thatsonensis sp. n. showed a distinctive pattern of sensilla on antennal article VI, labrum structures, anterior and posterior lateral processes equal in length and shorter than half-length of claw, anterior setiform process longer than claw. Etymology: Monographis thatsonensis is named after the Seven Mountain Ranges, derived from Sino-Vietnamese, meaning: That Son, in An Giang Province, Vietnam.Published as part of Huynh, Cuong, 2022, Four new species of Monographis Attems, 1907 (Diplopoda, Polyxenida, Polyxenidae) from Vietnam, pp. 393-420 in Zootaxa 5214 (3) on pages 411-413, DOI: 10.11646/zootaxa.5214.3.4, http://zenodo.org/record/738926
Alloproctoides consonensis Huynh 2020, new species
No full textAlloproctoides consonensis new species Figs 2–8, 9B. Material examined: Type specimens. Adult ♂ holotype (QMS 109011), 5 adult ♀ paratypes (QMS 109015– 109019), 3 adult ♂ paratypes (QMS 109012–109014) from Vietnam, Ba Ria-Vung Tau Province, Con Dao Islands, 8.706281°N, 106.590703°E, elevation 20 m; rainforest leaf litter in Ong Dung Beach, Con Son Island, 26th July 2015 (Collected by C. Huynh). Diagnosis: Adults 1.6–2.2 mm in length. Ommatidia absent. Antennomere VI with conical sensillum located in posterior position, with 2 long thick bacilliform sensilla, and 4 short thin bacilliform sensilla arranged diagonally, not arranged in a transverse row as in Alloproctoides remyi. Gnathochilarial medial palp with 58 sensilla (males), 18 sensilla (females)—not as in A. remyi with 38 (males) and 18 (females). Description: Head light orange, lateral margins dark reddish-brown. Body light orange, with contrasting white pleural trichomes, and lighter coloured caudal bundle (Fig. 2). Holotype male body length 1.7 mm (Paratypes: males 1.6–1.9 mm, females 1.9–2.2 mm). Male caudal trichome bundle narrower in width, bundle slightly longer (0.6 mm) than in female (0.5 mm). Head: Ommatidia absent. Vertex with two posterior trichome groups and a large medial gap. Each trichome group has 2 rows: anterior row, curved slightly, on an oblique angle with larger sized trichome sockets in the middle, and small sockets on both ends; posterior row with 1–2 trichome sockets; a narrow medial space between these 2 rows. Holotype with posterior trichome groups with 15 sockets (Left: L) and 14 sockets (Right: R) in the anterior rows; 2 sockets (L) and 1 socket (R) in the posterior rows (Fig. 3A) (Paratypes with 12–15 sockets in the anterior rows and 1–2 in the posterior rows (Fig. 4A)). Trichobothria: Trichobothrium b, largest socket located closest to the edge of the head capsule in lateral position, trichobothrium a, medium size socket located furthest from the edge of head capsule, trichobothrium c, smallest socket located anterior to sockets a and b. (Figs. 3E, 4C). Antennae: 8 antennomeres, 4 reduced sensory cones, antennomeres VII and VIII equal in length (Figs. 5A, 6A) as is typical of Lophoproctidae. Antennomere VI with 2 long thick bacilliform sensilla (T): Ta located in anterior position, Tp located in posterior position. Conical sensillum (c) of antennomere VI located next to Tp, 4 short thin bacilliform sensilla (st) arranged diagonally located anterior to Ta (Figs. 5C, 6C and 6D). Antennomere VII with 2 long thick bacilliform sensilla: Ta shorter than Tp. Setiform sensillum (s) of antennomere VI located distal and between Ta and Tp, a conical sensillum located in posterior position next to Tp (Fig. 5B) (Two conical sensilla apparent in some non-holotype specimens, Fig. 6B). Clypeo-labrum: with 11 setae (holotype), shorter than labrum width (paratypes with 10–12). Labrum posterior margin setose: 4–6 rows tiny backward facing setae. Thick marginal lamellae located on labrum anterior edge, with 2 linguiform processes in median cleft between lamellae (Figs. 3G, 4D). Gnathochilarium: medial palps with 58 sensilla (paratypes: males with 56–58, females with 18 sensilla) (Figs. 3F, 4E and 4F). Trunk: Body with 10 tergites, 9 pleural projections, and telson excluding caudal bundle. 13 pairs of legs (Fig. 4B). Collum (Tergite 1): Trichome sockets in 2 oval shapes laterally, large medial gap. Lateral protuberances with small number of trichome sockets each side (Fig. 4A). Tergites: Other tergites with pair of pleural projections located anterolaterally. Holotype with 49 (L) and 46 (R) trichome sockets on the collum. Lateral protuberances with 9 (L) and 8 (R) trichome sockets (Fig. 3B) (Paratypes with 46–58 sockets, lateral protuberances with 6–9). Tergites 2–10 have 2 latero-posterior oval groups of trichome sockets with a few sockets extended on both ends and these groups separated by a large medial gap (Fig. 4A). Holotype, tergite 2 with 50 (L) and 47 (R) trichome sockets (Fig. 3C), tergite 10 with 43 (L) and 40 (R) trichome sockets (Fig. 3D) (Paratypes, tergite 2: 54–66 sockets, tergite 10: 34–46). Legs: Leg segmentation following Manton (1956). Legs 1, 2 without trochanter; leg 1 without tarsus 1. Chaetotaxy (setae on leg articles): Holotype; coxa 1: 3 pubescent oval setae, coxa 2: 4, coxae 3–13: 2–5; pre-femur and post-femur: 1 pubescent oval seta; femur: 2 pubescent oval setae, one smaller located in ventromedial position (Figs. 7A, 7B and 7C) (Paratypes, female 3–6 setae on femur (Fig. 8C)); tarsus 2 with spine (Fig. 7D). Holotype, last sternite: 6 pubescent oval setae (Paratypes with 4–6 sockets). Male sex organs: 2 penes on second coxa, coxal glands absent. Telotarsus–Claw: Simple slender structure, claw (c) with two small processes called the laterodorsal denticles (ldd) equal in length and a small spine located in the ventral position of the claw called the basal denticle (bd) (Figs 7E, 8D). Telson: Dorsal ornamental trichome sockets symmetrically arranged on both sides of telson. Holotype with 7 sockets of trichome a (Paratypes with 6–8 trichome a) ; single trichome b, two large protruding basal sockets trichome c: c 1 and c 3 (c 2 absent) (Fig. 3H). Caudal bundles: Male, single caudal bundle, uniform sized sockets carrying caudal trichomes. Female, two caudal bundles: main dorsal structure, similar to male, 2 laterosternal structures with finer nest trichome sockets (Figs 8A and 8B). (These caudal structures are commonly found in Lophoturus species (Lophoproctidae) (Huynh and Veenstra, 2018b) and Monographis species (Huynh and Veenstra, 2018c) and are classified as a caudal bundle Type I by Condé and Nguyen Duy-Jacquemin (2008)). Remarks: Alloproctoides consonensis n. sp. was similar in appearance, to all species in the genus having the same characteristic sensilla morphology on antennomere VI. There is some variation in the arrangement of sensilla when comparing Alloproctoides species, for example, A. consonensis n. sp. is similar to A. remyi in the number and arrangement of short thin bacilliform sensilla on the antennomere VI. However, A. consonensis has 4 or sometimes 5 short thin bacilliform sensilla, with sockets on an acute angle placed parallel in anterior position to the long thick bacilliform sensillum (Fig. 9B). In contrast, A. remyi has 5 short thin bacilliform sensilla, 4 located in similar positions to those of A. consonensis n. sp. and one sensillum located in ventral position, in relation to the long thick bacilliform sensillum (Ta) (Fig. 9C). The number of sensilla on the gnathochilarium can also be used to differentiate between these two species: In males, A. remyi has 38 sensilla (Fig. 9C), A. consonensis n. sp. has 56–58 sensilla (Fig. 9B), and 18 sensilla in females of both species (Figs. 9B and 9C). Alloproctoides consonensis n. sp. and A. dawydoffi have the same arrangement of the sensilla, but these sensilla are positioned on a slightly different angle. The short thin bacilliform sensilla forming a transverse row in A. dawydoffi (Fig. 9A) compared to A. consonensis n. sp., which has a row of sensilla on an acute angle. If based solely on the arrangement of sensilla, Alloproctoides species from Con Dao Islands may have been identified as A. dawydoffi, a species found only on mainland Vietnam. Etymology: The species is named Alloproctoides consonensis n. sp. as they were found on Con Son Island, Con Dao Archipelago, Vietnam. Additional information about the genus Alloproctoides (Lophoproctidae) : The lectotype and paralectotype of Alloproctoides dawydoffi Attems, 1938, collected from Nha Trang, Khanh Hoa Province, Vietnam, were deposited in the National Museum of Natural History (Paris, France) by Nguyen Duy-Jacquemin and Condé (1967). This was the type specimen of Alloproctoides remyi Marquet and Condé, 1950, from Mauritius. These type specimens have not been found in the museum’s collection records. At present, there is only a single slide mounted adult female, with 13 pairs of legs, a handwritten label including ‘24 St. Denis * Alloproctoides simulans ♀ 13 H TYPE’ and a printed label ‘ Alloproctoides dawydoffi (Attems, 1938) M. Nguyen Duy’. This slide has a whole mount of a female with both antennae missing, embedded in Canada balsam. In this current study, which included collecting trips to Mauritius and Vietnam, specimens of A. dawydoffi (collected from Dinh Mountain (Nui Dinh), Ba Ria–Vung Tau Province, Vietnam) and A. remyi (collected from Sir Seewoosagur Ramgoolam Botanical Garden, Pamplemousses District, Mauritius) were plentiful. Many specimens from these two species have been slide mounted, creating a collection of neotypes now deposited in the Queensland Museum along with type specimens of A. consonensis. The purpose of neotypes of A. dawydoffi (QMS 10935 –36 for males, QMS 10937 –38 for females) and A. remyi (QMS 10939 –40 for males, QMS 10941 –42 for females) is to include them in the species records of genus Alloproctoides for future study, along with their genetic information (GenBank accession numbers: A. dawydoffi: MH729070 for 18S and MH737734 for COI; A. remyi: MH729071 for 18S and MH737735 for COI). In the genus Alloproctoides, morphological similarities can make correct species identification a challenge, particularly if using only the number and arrangement of sensilla on antennomere VI to distinguish between them. In the future, species identification will be easier with this new species being designated a species rather than subspecies; the subspecies Alloproctoides dawydoffi sineligulatus needs to be elevated to species level as Alloproctoides sineligulatus.Published as part of Huynh, Cuong, 2020, Three new species of penicillate millipedes from the Con Dao Islands of southeast Vietnam (Diplopoda, Lophoproctidae and Polyxenidae), pp. 1-30 in Zootaxa 4759 (1) on pages 4-10, DOI: 10.11646/zootaxa.4759.1.1, http://zenodo.org/record/373585
Intertwining connectivities in representable matroids
No full textLet M be a representable matroid and Q,R, S, T subsets of the ground set such that the smallest separation that separates Q from R has order k, and the smallest separation that separates S from T has order l. We prove that if M is sufficiently large, then there is an element e such that in one of M\e and M/e both connectivities are preserved. For matroids representable over a finite field we prove a stronger result: we show that we can remove e such that both a connectivity and a minor of M are preserved. © 2014 Society for Industrial and Applied Mathematics
- …
