118,010 research outputs found
Pseudopannota Waltz & McCafferty 1987
No full textGenus Pseudopannota Waltz & McCafferty 1987, s. l. (Figs 2, 3, 6, 7, 9–15, 17–112) Pseudopannota Waltz & McCafferty 1987: 95. = Ophelmatostoma Waltz & McCafferty 1987: 97, syn. n. = Hemipannota Elouard, Gillies & Wuillot 1990: 36, syn. n. Type species: Pseudocloeon bertrandi Demoulin 1967. Hierarchical name: Pseudopannota /g1 (incl. Ophelmatostoma, Hemipannota)Published as part of Kluge, Nikita J. & Novikova, Eugenia A., 2016, New tribe Labiobaetini tribus n., redefinition of Pseudopannota Waltz & McCafferty 1987 and descriptions of new and little known species from Zambia and Uganda, pp. 1-43 in Zootaxa 4169 (1) on page 5, DOI: 10.11646/zootaxa.4169.1.1, http://zenodo.org/record/26739
Nixe dorothae Webb & Mccafferty 2011, NEW SPECIES
No full textNixe dorothae Webb & McCafferty NEW SPECIES Larvae: Body length 7.5–10.5 mm; caudal filaments 5–8.5 mm. General color brown with pale markings (Figs. 1– 3). Head: Head capsule brown with two pale markings on anterior margin separated by distance less than distance between antennae bases, with pair of pale markings directly posterior to marginal pale markings, with small black spots often present near anterior margin, and with narrow pale streak extending from compound eye to lateral margin of head capsule; ocelli black with pale spot anterior to median ocellus and pale spot laterad of lateral ocellus. Mouthparts: Labrum (Fig 5a) ventrally with single row of 6–11 stout setae on either side of midline, anterolaterally with two rows of long, robust setae. Mandibles with 4–5 setae at base of incisors. Maxillae (Fig. 5b) with 11–14 comb setae of 5–7 spines on anterior margin, lateral two comb setae more hairlike, and numerous scattered fimbriate setae on ventral surface of galealacinia; maxillary palp with 1–3 fine setae on base, first segment with sparse long fine setae on anterior margin and several somewhat robust setae on posterior margin. Thorax: Brown with pale markings. Forefemur cream or pale brown with pair of brown chevron shaped markings, with dorsal row of long setae, with ventral row of sharp robust setae and with numerous pointed robust setae on anterior surface (as in Fig. 6b); foretibia pale brown with diffuse brown median band, with row of short fine setae on posterior margin and row of short fine setae on lateral ridge, and with 7–9 pointed robust setae on inner surface; foretarsus pale brown with distinct brown band basally, with long fine setae on posterior margin and scattered fine setae; foretarsal claw with two rows of denticles. Midleg similar to hindleg but with less numerous setae and no robust setae on lateral ridge of tibia. Hindfemur (Fig. 6a) similar to forefemur but setae more numerous; hindtibia with row of medium fine setae and 4–5 pointed robust setae on posterior margin, with 7–8 pointed robust setae and scattered fine setae on lateral ridge, with 11–12 robust setae on anterior margin, and with 12–20 robust simple setae on inner surface; hindtarsus with long fine setae on posterior margin and scattered fine setae, and with 6 simple pointed robust setae on inner surface; hindtarsal claw with two rows of denticles (Fig. 6c). Abdomen: Terga 2–7 brown with pair of submedian pale marks, single faint posteromedian pale mark, two pairs of sublateral pale marks (less evident in male larvae: Fig 3), and pair of lateral pale marks (Figs. 1–3). Sterna (Fig. 4) cream to pale brown with reddish brown pair of sublateral markings (more distinct on distal segments); anterior margins of distal segments often reddish-brown. Posterolateral spines present on segments 2 or 3–8. Gills cream, present on segments 1–7, with variously developed fibrils present on gills 1–6. Caudal filaments pale brown with spines at articulations and numerous fine intersegmental setae. Adult Male (in alcohol): Length: Forewing 5.0–6.0 mm; body 5.0–6.0 mm. Compund eyes grayish green to black, contiguous dorsally. Ocelli black basally, grayish green apically. Frons orange-yellow. Notum uniformly creamy orange; sternum yellow. Legs cream; forefemur apically orange-brown. Wings translucent. Abdominal terga (Figs. 7,8) reddish brown with pale median stripe, submedian pale marks, antero- and posterolateral corners pale, and posterior margins brown. Abdominal sterna cream. Caudal filaments cream, basal articulations reddish brown. Genitalia cream, penes (Figs. 9, 10) ventrally with pair of discal spines; basal sclerites with 1 or 2 pairs of minute dorsolateral spines; lateral sclerites without spines; apical sclerites slightly recurved, with 1 or 2 pairs median spines. Subgenital plate slightly emarginate with small moderately pointed lateral projections (Fig. 9) and with sparse minute spines. Adult Female (in alcohol): Length: Forewing 6.5–7.0 mm; Body 6.0–7.0 mm. Eyes gray-green to black. Ocelli black basally, gray-green apically. Frons orange. Notum yellow-orange; sternum yellow. Legs cream. Wings translucent. Abdomen yellow-orange; posterior margins of terga reddish brown; faint traces of reddish brown marks laterally; ninth sternum truncate. Caudal filaments cream. Etymology. This species is named in honor of the JMW's late grandmother, Dorothy Webb. Diagnosis and discussion. Larvae of N. dorothae are identified by the presence of two rows of denticles on the tarsal claws (Fig. 6c). Nixe dorothae and N. perfida are superficially similar and occur in the same geographic region, but, in addition to the second row of denticles, N. dorothae larvae usually have two pairs of pale sublateral spots on each abdominal tergum (Fig. 1) whereas N. perfida larvae have only a single pair. Nixe flowersi is also known from southern Indiana but differs from N. dorothae by having a single row of denticles on the tarsal claws, clavate robust setae on the femora (similar to Fig. 18), and much more extensive pale areas on the abdominal terga (Fig. 19, McCafferty 1977: Fig. 3, as Heptagenia perisimplex McDunnough, 1929) The reddish brown markings on the abdominal sterna can vary within populations from completely absent to well developed and should not be considered diagnostic. Adult males are differentiated from North American congeners by the combination of the reddish brown dorsal color pattern (Fig. 7) and penes with median spines on the apical sclerites (Fig. 10). The only other North American species with spines on the apical sclerites is N. flowersi, but its abdomen is cream colored rather than reddish brown. Nixe horrida, N. lucidipennis, N. perfida and N. rusticalis all have reddish brown abdominal terga, but the penes lack median spines on the apical sclerites. Nixe dorothae were most often collected from small, intermittent or spring-fed streams in southern Indiana. Material examined. HOLOTYPE: IN: JACKSON CO: ♀ larva, Hoosier Nat For, Combs Br at road, near Maumee, 39°01'N 86°17'W, 12-V-2005, JM Webb & JM Hwang. PARATYPES: IN: JACKSON CO: 2 ♂ imagos (genitalia slide mounted in Euparal and Cellosolve), same data as holotype; 21 larvae, same data as holotype; 11 larvae (1 slidemounted), Hoosier Nat For, Little Salt Cr at Co Rd 1075N, 39°01'53”N 86°10'20”W, 5-V-2005, LM & MW Jacobus. All material deposited in Purdue Entomological Research Collection, West Lafayette, IN. Other material examined: IN: BROWN CO: 18 larvae, stream feeding Yellowwood L, Yellowwood St For, V-24-1978, M Minno & D Bloodgood; JACKSON CO: 4 ♂ imagos (genitalia of 1 slide mounted), 4 ♂ subimagos, 6 ♀ imagos with associated exuviae, same data as holotype; 10 larvae, same data as holotype; 47 larvae (1 slidemounted), Hoosier Nat For, Combs Br at road, near Maumee, 39°01'N 86°17'W, 5-V-2005, LM & MW Jacobus; 3 larvae (1 slidemounted), trib Buck Cr, NE Spraytown, 39°01'36”N 86°05'33”W, 7-V-2000, LM Jacobus; 7 larvae, Hoosier Nat For, Cross Br at Co Rd 650W, 39°02'55”N 86°09'53”W, 5-V-2005, LM & MW Jacobus; SPENCER CO: 2 larvae, ditch 1 mi W Lincoln St Prk, at gravel road and RR track, 7-V-1972, WP McCafferty & AV Provonsha; 4 larvae, ditch 1 mi W Lincoln St Prk, at gravel road and RR track, 7-V-1972, JW Smith; 5 larvae, trib E Fk Little Pigeon Cr 2.5 mi S Lincoln on gravel road, 6-V-1972, D Lockwood; 30 larvae, trib of Little Pigeon Cr 2 mi SW Lincoln St Prk on gravel road, 17-V-1973, WP McCafferty, K Black, AV Provonsha; 6 larvae, N Frk Little Pigeon Cr at Hwy 68, 6-V-1972, JW Smith; 10 larvae, E Frk Little Pigeon Cr 2 mi S Lincoln St Prk on gravel road, 7-V-1972, no collector indicated; 1 larva, Crooked Cr 1 mi S Lamar, E of St Hwy 245, 17-V-1973, WP McCafferty, K Black, AV Provonsha; 6 larvae, small trib of Little Pigeon Cr 1.5 mi S Lincoln on gravel road and RR tracks, 13- V-1976, AV Provonsha, M Minno; WARRICK CO: 5 larvae, Pokeberry Cr, 7-V-1972, L Lehman; 5 larvae, Wallace Fk Little Pigeon Cr, 6-V-1972, JW Smith; 3 larvae, Wallace Fk Little Pigeon Cr, 7-V-1972, D Lockwood; 4 larvae, Wallace Fk Little Pigeon Cr, 7-V-1972, L Lehman.Published as part of Webb, J. M. & Mccafferty, W. P., 2011, Contributions to the larvae of North American Nixe (Ephemeroptera: Heptageniidae), with the description of N. dorothae sp. nov. from southern Indiana, pp. 27-37 in Zootaxa 3065 (1) on pages 27-32, DOI: 10.11646/zootaxa.3065.1.3, http://zenodo.org/record/527997
Applications of thermal imaging in avian science
Get PDFThermal imaging, or infrared thermography, has been used in avian science since the 1960s. More than 30 species of birds, ranging in size from passerines to ratites, have been studied using this technology. The main strength of this technique is that it is a non-invasive and non-contact method of measuring surface temperature. Its limitations and measurement errors are well understood and suitable protocols have been developed for a variety of experimental settings. Thermal imaging has been used most successfully for research on the thermal physiology of captive species, including poultry. In comparison with work on mammals, thermal imaging has been less used for population counts, other than for some large bird species. However, more recently it has shown greater success for detection of flight paths and migration. The increasing availability and reduced cost of thermal imaging systems is likely to lead to further application of this technology in studies of avian welfare, disease monitoring, energetics, behaviour and population monitoring
Bugilliesia Lugo-Ortiz & McCafferty 1996
No full textPlesiomorphon Bugilliesia Lugo-Ortiz & McCafferty 1996 (Figs 50–55) Rank-free hierarchical name: Bugilliesia /g(1). Type species: Afroptilum guineense Gillies 1990 a. References: Gattolliat et al. 2009: larva, imago; Kluge 2012: larva, imago. Composition. Seven described species belong without doubt in Bugilliesia, being known as male imagoes, which have characteristic genital structure and well developed hind wings; these are: biloba Gattolliat 2006 [Bugilliesia]; cavalliensis Gattolliat 2006 [Bugilliesia]; griseum Gillies 1990 [Afroptilum]; guineense Gillies 1990 [Afroptilum]; notabile Kimmins 1956 [Centroptilum]; sudanense Ulmer 1916 [Centroptilum]; truncata Gattolliat 2006 [Bugilliesia]. Among them, only griseum [Afroptilum], guineense [Afroptilum] and sudanense [Centroptilum] larvae have been associated with the imago by rearing (Gillies 1990 a). Besides this, two species, margaretae Gattolliat & Barber-James 2009 [Bugilliesia] and mirandei Lugo-Ortiz & McCafferty 1997 [Cheleocloeon] are known as larvae only, and their relation with the species described as imagoes is unknown (Gattolliat et al. 2009). Placement of the species nitidum Ulmer 1916 [Centroptilum] (= nigroalbum Navas 1932 [Cloeon] = bredoanum Navas 1933 [Cloeon]) to Bugilliesia is not grounded (Kluge 2012). Besides these formally described species, some undescribed species belong to Bugilliesia (see below). Material examined: Bugilliesia notabilis: UGANDA, Jinja, F.I.R.R.I., 6–10.VII. 2007, coll. N. Kluge: 8 I ♀; Bujagali Falls 6.VII. 2007, coll. N. Kluge: 1 S♂, 12 I ♀. ZAMBIA, Mwinilunga District: River Mudanyama in Mwinilunga, 14–17.VIII. 2014, coll. N. Kluge & L. Sheyko: 1 I ♀; River Lwakela, 22 km N Mwinilunga, 18– 21.VIII. 2014, coll. N. Kluge and L. Sheyko: 1 I ♀. Bugilliesia sudanensis: SUDAN, White Nile, 26.I. 1964, coll. A.V. Monakov: 4 larvae; Ed-Dueim, 19.XI. 1963, coll. A.V. Monakov: 1 male larva. Bugilliesia grisea: UGANDA: Victoria Nile at Bujagali Falls, 7.VII. 2007, coll. N. Kluge: 1 female larva; Kasese District, River Nyamagasan near Kiburara, 8–13.VIII. 2007, coll. N. Kluge: 1 mature female larva with well-developed eggs. Bugilliesia biloba: MALI, Bafing bei Tinko, 1.X. 1991, coll. D. Tobias: 1 I ♂. Bugilliesia sp. K: Kluge 2012: British East Africa, Kahavati, 20.I. 1911, coll. Svatosh: 1 I ♂. Bugilliesia sp. N: Kluge 2012: UGANDA, Jinja, F.I.R.R.I., 6–10.VII. 2007, coll. N. Kluge: 5 I ♂, 10 I ♀; Bujagali Falls 6.VII. 2007, coll. N. Kluge: 1 S-I♂. Bugilliesia sp. NZ: ZAMBIA, River Zambezi near Victoria Falls 25–31.VIII. 2014, coll. N. Kluge & L. Sheyko: 1 gynandromorph imago. This specimen has one left well-developed gonostylus of the same structure as in Bugilliesia sp. N, with the same numerous spines on inner sides of 2 nd segment (Kluge 2012: Figs 40–42); other structure as in female, with well developed eggs (Fig. 53). Differs from Bugilliesia sp. N by presence of reddish maculae on abdomen, which are situated asymmetrically (possibly, individual feature of gynandromorph). Plesiomorphies. Hind wings developed, with hooked costal process (in contrast to Mutelocloeon and Rhithrocloeon, whose hind wing is reduced or lost). Larval claw retains both rows of denticles (Fig. 55) (in contrast to Mutelocloeon, whose larval claw lack denticles, and Rhithrocloeon, whose larval claw has one row of denticles). Other characters of larva. Described by Gattolliat et al. (2009) and Kluge (2012). Egg structure (Figs 50–54). Chorion with characteristic structure in form of round impressions, some interconnecting, some separated by partitions with flat surfaces; while all impressions usually have similar size and shape, partitions are variable in thickness and shape, and absent in some places (Figs 50, 51). This distinguishes Bugilliesia from many other mayflies, whose eggs have a net-like relief with closed cells, where partitions have equal thickness, while cells can have unequal size and shape (Figs 47, 48). Very similar structure on egg chorion is found in the examined species of Bugilliesia — B. notabilis (Fig. 51), B. grisea (Fig. 54) and Bugilliesia sp. N (Fig. 51). In Bugilliesia sp. NZ relief is often smoothed out; if present, cells are somewhat smaller and less regular than in other species, and partitions between them are thick and integral (Fig. 53). Just the same relief of egg chorion as in Bugilliesia, is found in Mutelocloeon (see below and Figs 56–59), while in Rhithrocloeon relief of egg chorion is quite different (see below and Figs 65–70). Comments. Based on reared material, Gillies (1990 a) described larvae of Afroptilum sudanense, A. griseum and A. guineense (recently attributed to Bugilliesia) without detailed figures of their claws; he only reported that "tarsal claws toothed and without a seta before apex" (Gillies 1990 a: 114) and gave drawings of total legs of A. griseum, where claws are too small to show their teeth (ibid., Figs 79–81). There are no other descriptions of Bugilliesia which would be based on larval exuviae associated with reared imagoes. Lugo-Ortiz & McCafferty (1996) established the new genus Bugilliesia without examination of any material. Based on literature data only, they stated that in Bugilliesia "tarsal claws poorly dentate" (Lugo-Ortiz & McCafferty 1996: 184) and that "larvae of... Bugilliesia... lack the 2 rows of denticles on the tarsal claw" (Lugo-Ortiz & McCafferty 1998: 2). Gattolliat et al. (2009: 169) correctly state that "there are always two rows of abundant teeth in Bugilliesia " and gave illustration of the claw of B. margaretae (ibid., Fig. 32). Larvae of B. grisea and B. sudanensis, examined by me, have two equal and symmetrically arranged rows of teeth, each with several (2–5) most distal teeth much larger than more proximal ones (Fig. 55).Published as part of Kluge, Nikita J., 2015, First description of winged stages of Thraulobaetodes Elouard & Hideux 1991 and reclassification of Rhithrocloeoninae (Ephemeroptera, Baetidae), pp. 491-514 in Zootaxa 3949 (4) on pages 506-508, DOI: 10.11646/zootaxa.3949.4.2, http://zenodo.org/record/24240
Bugilliesia Lugo-Ortiz & McCafferty 1996
No full textPlesiomorphon Bugilliesia Lugo-Ortiz & McCafferty 1996 (Figs 50–55) Rank-free hierarchical name: Bugilliesia /g(1). Type species: Afroptilum guineense Gillies 1990 a. References: Gattolliat et al. 2009: larva, imago; Kluge 2012: larva, imago. Composition. Seven described species belong without doubt in Bugilliesia, being known as male imagoes, which have characteristic genital structure and well developed hind wings; these are: biloba Gattolliat 2006 [Bugilliesia]; cavalliensis Gattolliat 2006 [Bugilliesia]; griseum Gillies 1990 [Afroptilum]; guineense Gillies 1990 [Afroptilum]; notabile Kimmins 1956 [Centroptilum]; sudanense Ulmer 1916 [Centroptilum]; truncata Gattolliat 2006 [Bugilliesia]. Among them, only griseum [Afroptilum], guineense [Afroptilum] and sudanense [Centroptilum] larvae have been associated with the imago by rearing (Gillies 1990 a). Besides this, two species, margaretae Gattolliat & Barber-James 2009 [Bugilliesia] and mirandei Lugo-Ortiz & McCafferty 1997 [Cheleocloeon] are known as larvae only, and their relation with the species described as imagoes is unknown (Gattolliat et al. 2009). Placement of the species nitidum Ulmer 1916 [Centroptilum] (= nigroalbum Navas 1932 [Cloeon] = bredoanum Navas 1933 [Cloeon]) to Bugilliesia is not grounded (Kluge 2012). Besides these formally described species, some undescribed species belong to Bugilliesia (see below). Material examined: Bugilliesia notabilis: UGANDA, Jinja, F.I.R.R.I., 6–10.VII. 2007, coll. N. Kluge: 8 I ♀; Bujagali Falls 6.VII. 2007, coll. N. Kluge: 1 S♂, 12 I ♀. ZAMBIA, Mwinilunga District: River Mudanyama in Mwinilunga, 14–17.VIII. 2014, coll. N. Kluge & L. Sheyko: 1 I ♀; River Lwakela, 22 km N Mwinilunga, 18– 21.VIII. 2014, coll. N. Kluge and L. Sheyko: 1 I ♀. Bugilliesia sudanensis: SUDAN, White Nile, 26.I. 1964, coll. A.V. Monakov: 4 larvae; Ed-Dueim, 19.XI. 1963, coll. A.V. Monakov: 1 male larva. Bugilliesia grisea: UGANDA: Victoria Nile at Bujagali Falls, 7.VII. 2007, coll. N. Kluge: 1 female larva; Kasese District, River Nyamagasan near Kiburara, 8–13.VIII. 2007, coll. N. Kluge: 1 mature female larva with well-developed eggs. Bugilliesia biloba: MALI, Bafing bei Tinko, 1.X. 1991, coll. D. Tobias: 1 I ♂. Bugilliesia sp. K: Kluge 2012: British East Africa, Kahavati, 20.I. 1911, coll. Svatosh: 1 I ♂. Bugilliesia sp. N: Kluge 2012: UGANDA, Jinja, F.I.R.R.I., 6–10.VII. 2007, coll. N. Kluge: 5 I ♂, 10 I ♀; Bujagali Falls 6.VII. 2007, coll. N. Kluge: 1 S-I♂. Bugilliesia sp. NZ: ZAMBIA, River Zambezi near Victoria Falls 25–31.VIII. 2014, coll. N. Kluge & L. Sheyko: 1 gynandromorph imago. This specimen has one left well-developed gonostylus of the same structure as in Bugilliesia sp. N, with the same numerous spines on inner sides of 2 nd segment (Kluge 2012: Figs 40–42); other structure as in female, with well developed eggs (Fig. 53). Differs from Bugilliesia sp. N by presence of reddish maculae on abdomen, which are situated asymmetrically (possibly, individual feature of gynandromorph). Plesiomorphies. Hind wings developed, with hooked costal process (in contrast to Mutelocloeon and Rhithrocloeon, whose hind wing is reduced or lost). Larval claw retains both rows of denticles (Fig. 55) (in contrast to Mutelocloeon, whose larval claw lack denticles, and Rhithrocloeon, whose larval claw has one row of denticles). Other characters of larva. Described by Gattolliat et al. (2009) and Kluge (2012). Egg structure (Figs 50–54). Chorion with characteristic structure in form of round impressions, some interconnecting, some separated by partitions with flat surfaces; while all impressions usually have similar size and shape, partitions are variable in thickness and shape, and absent in some places (Figs 50, 51). This distinguishes Bugilliesia from many other mayflies, whose eggs have a net-like relief with closed cells, where partitions have equal thickness, while cells can have unequal size and shape (Figs 47, 48). Very similar structure on egg chorion is found in the examined species of Bugilliesia — B. notabilis (Fig. 51), B. grisea (Fig. 54) and Bugilliesia sp. N (Fig. 51). In Bugilliesia sp. NZ relief is often smoothed out; if present, cells are somewhat smaller and less regular than in other species, and partitions between them are thick and integral (Fig. 53). Just the same relief of egg chorion as in Bugilliesia, is found in Mutelocloeon (see below and Figs 56–59), while in Rhithrocloeon relief of egg chorion is quite different (see below and Figs 65–70). Comments. Based on reared material, Gillies (1990 a) described larvae of Afroptilum sudanense, A. griseum and A. guineense (recently attributed to Bugilliesia) without detailed figures of their claws; he only reported that "tarsal claws toothed and without a seta before apex" (Gillies 1990 a: 114) and gave drawings of total legs of A. griseum, where claws are too small to show their teeth (ibid., Figs 79–81). There are no other descriptions of Bugilliesia which would be based on larval exuviae associated with reared imagoes. Lugo-Ortiz & McCafferty (1996) established the new genus Bugilliesia without examination of any material. Based on literature data only, they stated that in Bugilliesia "tarsal claws poorly dentate" (Lugo-Ortiz & McCafferty 1996: 184) and that "larvae of... Bugilliesia... lack the 2 rows of denticles on the tarsal claw" (Lugo-Ortiz & McCafferty 1998: 2). Gattolliat et al. (2009: 169) correctly state that "there are always two rows of abundant teeth in Bugilliesia " and gave illustration of the claw of B. margaretae (ibid., Fig. 32). Larvae of B. grisea and B. sudanensis, examined by me, have two equal and symmetrically arranged rows of teeth, each with several (2–5) most distal teeth much larger than more proximal ones (Fig. 55).Published as part of Kluge, Nikita J., 2015, First description of winged stages of Thraulobaetodes Elouard & Hideux 1991 and reclassification of Rhithrocloeoninae (Ephemeroptera, Baetidae), pp. 491-514 in Zootaxa 3949 (4) on pages 506-508, DOI: 10.11646/zootaxa.3949.4.2, http://zenodo.org/record/24240
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Cloeodes incus Waltz & McCafferty, n. comb.
No full textCloeodes incus (Waltz & McCafferty) n. comb. (Figs. 31–42) Bernerius incus Waltz & McCafferty, 1987 a: 181. Baetis (?) sp. B. Berner, 1980: 190. Diagnosis. Cloeodes incus n. comb., known from nymphs, can be distinguished from the other species of the genus by the following combination of characters: 1) labrum (Fig. 31) with one subapical seta centrally and two setae near lateral margin, anterior margin with basally bifid setae near midline and apically bifid setae near lateral margin; 2) mandibles without setae between prostheca and mola; 3) left mandible with thumb of molar area in the same plane as anterior margin (Fig. 32); 4) right mandible with incisors cleft in two sets (Fig. 33); 5) lingua with a rounded projection (Fig. 34); 6) maxillary palpi long, 1.5 times the length of galealacinia, two segmented, segment II with a constriction (Fig. 35); 7) labium with segment III of palpi rounded (Fig. 36); 8) hind wing pads present; 9) dorsal edge of femora (Fig. 37) with a row of pointed spines and apically rounded (as in Fig. 63), femora, tibiae and tarsi with bipectinate spines; 10) tarsal claws with minute denticles basally (Fig. 38); 11) posterior margins of abdominal terga with spines (Fig. 39), sterna with long fine setae randomly distributed throughout; 12) gills pointed apically (Fig. 40); 13) posterior margin of paraprocts with spines apically (Fig. 41); 14) caudal filaments with simple setae, and with whorl of spines on each segment (Fig. 42). Material examined. Paratypes: 2 nymphs: BOLIVIA, trib. Río Umalo o Grande, below Calamarca on La Paz, Oruro Rd, 18 / VII/ 1977, S. S. Roback & L. Berner colls. Material housed in FAMU.Published as part of Nieto, Carolina & Richard, Barton, 2008, The genus Cloeodes (Ephemeroptera: Baetidae) in Argentina with new generic synonymy and new species, pp. 1-21 in Zootaxa 1727 on page 11, DOI: 10.5281/zenodo.18123
Square Dancing with the Stars to Enhance Dynamic Hirschman Linkages?
No full textIn this Presidential Address, the author takes the reader on a reconnaissance of his life and time as a regional scientist. He points out scenery he found scintillating along the way, hoping that some may pick up the banner and chew on a few of the ideas for a while. He suggests a revisit to Albert O. Hirschman’s notion of key sectors and more empirical analysis related to Marcus Berliant’s and Masahisa Fujita’s notion of knowledge creation and transfer.Presidential Address, San Antonio, Texas, March 29, 2014 (53rd Meetings of the Southern Regional Science Association
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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