1,354,432 research outputs found
Diegus nom. nov., a replacement name for the recent described genus Didacus Delicado, Machordom and Ramos 2015 (Caenogastropoda, Hydrobiidae) and subsequent new combination Diegus gasulli (Boeters, 1981) comb. nov.
No full textDiegus nom. nov. (Caenogastropoda, Hydrobiidae), new replacemente name for the genus Didacus Delicado, Machordom & Ramos, 2015 (non Collart, 1935; Diptera, Tephritidae)
Raymunida Macpherson & Machordom 2000
No full textRaymunida Macpherson & Machordom, 2000 Raymunida Macpherson & Machordom, 2000: 253. Remarks. Macpherson & Machordom (2000, 2001) erected Raymunida for species previously placed in Munida that bear an epipod on the first three pereopods and a frontal spine mesiad to the anterolateral spines on the carapace. Two species of Raymunida are presently known from the study area, of which one is a new record for Australia. Macpherson & Machordom (2001) and Lin et al. (2004) provide keys to the species of Raymunida.Published as part of Ahyong, Shane T. & Poore, Gary C. B., 2004, Deep-water Galatheidae (Crustacea: Decapoda: Anomura) from southern and eastern Australia, pp. 1-76 in Zootaxa 472 (1) on page 69, DOI: 10.11646/zootaxa.472.1.1, http://zenodo.org/record/555292
High level of phenotypic homoplasy amongst eutardigrades (Tardigrada) based on morphological and total evidence phylogenetic analyses
No full textMuch of what is known about the phylogenetic relationships of the neglected phylum Tardigrada comes from
molecular data, rather than from morphology-based phylogenetic studies. Several molecular phylogenies have been
proposed, but morphological and total evidence phylogenetic approaches are scarce. We performed the first
morphological phylogeny (based on maximum parsimony and Bayesian inference) including all genera from the
class Eutardigrada. Furthermore, we carried out a total evidence approach adding molecular information available
in public databases. We compared the morphological and total evidence phylogenies with current molecular
hypotheses and Eutardigrada classifications, which our results partially support. These classifications were
supported only when homoplastic characters (related to the buccopharyngeal apparatus) were excluded. The
importance of morphological phylogenies is discussed as well as their utility for questioning current phylogenetic
hypotheses and classifications based solely on molecular information. Lastly, we propose evolutionary hypotheses
about eutardigrade phylogenetic relationships that should be tested based on our morphological results
Observations on the "tenuis group" (Eutardigrada, Macrobiotidae) and description of a new Macrobiotus species
No full textA new species of the tardigrade genus Macrobiotus is described. The species, designated M. ciprianoi n.sp., was isolated from a mixture of Provence broom leaf litter and mosses, and from rock mossescollected in the Sierra de Guadarrama, Madrid (Spain). Given that Macrobiotus ciprianoi n. sp. sharesseveral characters to members of the ‘‘tenuis group’’, we assessed the taxonomic homogeneity of thegroup. The new species differs from those of the ‘‘tenuis group’’ according to a unique set ofcharacters related with claw shape, features of the buccal-pharyngeal apparatus, and egg morphology.Our analysis of holotypes and/or paratypes of ‘‘tenuis group’’ species and other Macrobiotus specieswith similar characters (M. bondavallii and M. caelicola) reflects the heterogeneity of this group ofspecies as currently described
Figure 2 in Use of morphological and molecular data to identify three new sibling species of the genus Munida Leach, 1820 (Crustacea, Decapoda, Galatheidae) from New Caledonia
No full textFigure 2. Munida simulatrix sp. nov., male 7.7 mm, holotype from stn 1721 (NORFOLK 1). (A) Carapace, dorsal view; (B) sternal plastron; (C) ventral view of cephalic region, showing antennular and antennal peduncles; (D) right third maxilliped, lateral view; (E) right cheliped, dorsal view; (F) right first walking leg, lateral view; (G) dactylus of right first walking leg, lateral view.Published as part of Macpherson, E. & Machordom, A., 2005, Use of morphological and molecular data to identify three new sibling species of the genus Munida Leach, 1820 (Crustacea, Decapoda, Galatheidae) from New Caledonia, pp. 819-834 in Journal of Natural History 39 (11) on page 826, DOI: 10.1080/00222930400002473, http://zenodo.org/record/521413
Hidden Mediterranean biodiversity: molecular evidence for a cryptic species complex within the reef building vermetid gastropod Dendropoma petraeum (Mollusca: Caenogastropoda)
No full textUnderestimated diversity of hydrobiid snails. The case of<i>Pseudamnicola (Corrosella)</i>(Mollusca: Caenogastropoda: Hydrobiidae)
No full textFigure 1. Distribution map of the Pseudamnicola species examined.Published as part of Delicado, Diana, Machordom, Annie & Ramos, Marian A., 2011, Underestimated diversity of hydrobiid snails. The case of Pseudamnicola (Corrosella) (Mollusca: Caenogastropoda: Hydrobiidae), pp. 25-89 in Journal of Natural History (J. Nat. Hist.) 46 (1-2) on page 27, DOI: 10.1080/00222933.2011.623358, http://zenodo.org/record/519954
Torbenella mensae Macpherson & Rodríguez-Flores & Machordom 2023, sp. nov.
No full textTorbenella mensae sp. nov. urn:lsid:zoobank.org:act: 1D01DE3B-C8B9-4316-8457-33EE2B7B9526 Fig. 5 Torbenella aff. orbis 2.— Machordom et al. 2022: table 2. Etymology The name ‘ mensae ’ refers to one of the southern hemisphere constellations (the Table Mountain). Material examined Holotype PAPUA-NEW GUINEA • ♂ (7.2 mm); MADEEP stn DW4312; 09°50′ S, 151°34′ E; 120–280 m depth; 3 May 2014; GenBank no.: COI: OP215691, 16S: OP196030, 18S: OP 196288; MNHN-IU-2016-3004. Description CARAPACE. Slightly wider than long. Transverse ridges with dense, very short setae, not medially interrupted. Scales and secondary striae absent between main striae. Gastric region with 2 main epigastric spines, each behind supraocular spine; 3–5 additional minute spines on each lateral side; some small spines at base of rostrum and in parahepatic, hepatic and anterior branchial regions; one small postcervical spine on each side. Orbit with iridescent mesial, rounded mound, lateral limit slightly defined. Frontal margins concave. Lateral margins slightly convex. Anterolateral spine well developed, at anterolateral angle, reaching level of sinus between rostrum and supraocular spines. One small marginal spine anterior to cervical groove. Branchial margins with 4 small spines. Rostrum spiniform, less than half as long as remaining carapace, reaching end of corneae, straight, and directed slightly upwards. Supraocular spines not reaching midlength of rostral spine and falling short of end of corneae, subparallel, directed slightly upwards. THORACIC STERNUM. Smooth, without striae, except a few on sternite 4. Sternite 3 3.2 times as wide as long; sternite 4 3.6 times as wide as long, twice wider than sternite 3. Anterior margin of sternite 4 contiguous to entire posterior margin of sternite 3. ABDOMEN. Somites 2–4 each with 2 median spines on anterior ridge; posterior ridge of somite 4 unarmed. Somites 2–3 each with 3 transverse ridges and several scales in addition to anterior ridge. Somite 4 with a few striae. EYES. Eyes large, corneae dilated, maximum diameter 0.4 times distance between bases of anterolateral spines. ANTENNULE. Article 1 (distal spines excluded) about one-third carapace length, elongate, barely reaching end of corneae, with 2 short distal spines, distomesial spine shorter than distolateral spine; lateral margin unarmed, bearing numerous long plumose setae. ANTENNA. Article 1 with prolonged, strong mesial process, exceeding antennular peduncle, lateral border with long plumose setae; article 2 with 2 distal spines, distomesial slightly larger than distolateral, not reaching end of article 3; article 3 with minute distomesial spine, article 4 unarmed. MXP3. Ischium about 1.5 times length of merus, distoventrally produced to spine. Merus with well developed median spine on flexor margin, extensor margin unarmed. P1. Lost. P2–3 (P4 lost). Moderately long and slender, squamous, with dense short setae on scales, and some long iridescent setae along extensor margins of all articles. P2 2.8 times carapace length. Meri shorter posteriorly (P3 merus 0.9 times length of P2 merus); P2 merus 1.2 times carapace length, 8.5 times as long as wide, 1.6 times as long as P2 propodus; P3 merus 4.0 times as long as wide. Extensor margins of P2–3 meri with row of small proximally diminishing spines; flexor margins with distal spines followed proximally by several eminences; lateral sides unarmed. Carpi with several spines on extensor margin; flexor margin ending in blunt point. P2 propodus 8 times as long as wide; extensor margin unarmed; flexor margin with 9 slender movable spines, without fixed distal spine. P2 dactylus long and slender, 7.5 times as long as wide, length 0.8 times that of propodus; flexor margin with 4 movable spinules along proximal half. Genetic data COI, 16S and 18S were successfully sequenced. CO1 provided the maximum divergence between T. mensae sp. nov. and T. aequabilis sp. nov. (15.17%). The minimum value for this gene and species was 12.87% with respect to T. crateris sp. nov. Torbenella mensae sp. nov. appeared in the phylogenetic reconstruction as a sister species of T. calvata (Fig. 7), but with a low support (pp = 0.62). Remarks Torbenella lupi sp. nov., T. mensae sp. nov. and T. orbis (Baba, 2005) are unique in the genus in having the presence of spines along the anterior ridge of the abdominal somite 2. Torbenella mensae is easily distinguished from the other 2 species by the wider thoracic sternite 3 (more than 3 times as wide as long) and the absence of spines on the posterior ridge of the abdominal somite 4. The other species have the thoracic sternite 3 moderately wide, less than 3 times as wide as long, and the posterior ridge of the abdominal somite 4 usually with small median spines. Torbenella lupi sp. nov. and T. orbis were found at the same station in Papua-New Guinea. Torbenella lupi is distinguished from T. orbis by having spinules on the flexor margin of the P2–4 dactyli, which are absent in T. orbis. Furthermore, these articles are more slender in T. orbis than in the new species (7.5 vs 5.5 times as long as wide). The genetic differences among the three species were: 13.28% for COI between T. mensae and T. lupi sp. nov., and 14.70% between T. mensae and T. orbis (COI), and pairwise distance of 11.12% for 16S between T. mensae and T. orbis; sequence data for 16S was not available for T. lupi. Distribution Papua-New Guinea, between depths of 120 and 280 m.Published as part of Macpherson, Enrique, Rodríguez-Flores, Paula C. & Machordom, Annie, 2023, Integrative approach to describe new species of squat lobsters of the genera Heteronida Baba & de Saint Laurent, 1996 and Torbenella Baba, 2008 (Decapoda, Munididae) from the Southwestern Pacific Ocean, pp. 116-140 in European Journal of Taxonomy 860 (1) on pages 132-136, DOI: 10.5852/ejt.2023.860.2055, http://zenodo.org/record/768943
Genetic assessment of population structure and connectivity in the threatened Mediterranean coral Astroides calycularis (Scleractinia, Dendrophylliidae) at different spatial scales
No full textUnderstanding dispersal patterns, population structure and connectivity among populations is helpful in the management and conservation of threatened species. Molecular markers are useful tools as indirect estimators of these characteristics. In this study, we assess the population genetic structure of the orange coral Astroides calycularis
in the Alboran Sea at local and regional scale, and at three localities outside of this basin. Bayesian clustering methods, traditional F-statistics and Dest statistics were used to
determine the patterns of genetic structure. Likelihood and coalescence approaches were used to infer migration patterns and effective population sizes. The results obtained
reveal a high level of connectivity among localities separated by as much as 1 km and moderate levels of genetic differentiation among more distant localities, somewhat
corresponding with a stepping-stone model of gene flow and connectivity. These data suggest that connectivity among populations of this coral is mainly driven by the biology
of the species, with low dispersal abilities; in addition, hydrodynamic processes, oceanographic fronts and the distribution of rocky substrate along the coastline may
influence larval dispersal
Torbenella aequabilis Macpherson & Rodríguez-Flores & Machordom 2023, sp. nov.
No full textTorbenella aequabilis sp. nov. urn:lsid:zoobank.org:act: C00CBABF-A072-4153-BF27-A2FEFCDF002C Fig. 2 Torbenella aff. calvata 2 – Machordom et al. 2022: table 2. Etymology From the Latin ‘ aequabilis ’, ‘equal’, in reference to the similar morphology to Torbenella crateris sp. nov. Material examined Holotype NEW CALEDONIA • ♀ (6.6 mm); KANACONO stn DW4785; 22°48′ S, 167°41′ E; 388–403 m depth; 29 Aug. 2016; GenBank no.: COI: OP215687, 16S: OP196026, PEPCK: OP252561; MNHNIU-2017-8750. Paratype NEW CALEDONIA • ♀ (6.8 mm); same collection data as for holotype; MNHN-IU-2014-13980. Description CARAPACE. As long as wide. Transverse ridges usually interrupted, except several on gastric region and posterior part of carapace, with dense very short setae. Scales and secondary striae absent between main striae. Gastric region with 2 main epigastric spines, each behind supraocular spine; 4–6 additional minute spines on each side and 2–3 between median spines; several small spines at base of rostrum and in parahepatic, hepatic and anterior branchial regions; one small postcervical spine on each side. Orbit with lateral limit slightly defined. Frontal margins concave. Lateral margins slightly convex. Anterolateral spine well developed, at anterolateral angle, barely reaching level of sinus between rostrum and supraocular spines. One or 2 very small marginal spines anterior to cervical groove. Branchial margins with 4 small spines. Rostrum spiniform, 0.4 times carapace length, not exceeding end of corneae, carinated dorsally, straight, and directed slightly upwards. Supraocular spines not reaching midlength of rostral spine and falling far short of end of corneae, subparallel, directed slightly upwards. THORACIC STERNUM. Smooth, without striae, except a few on sternite 4. Anterior part of sternite 4 slightly narrower than sternite 3; anterior margin widely contiguous to sternite 3. Sternite 3 2.5 times as wide as long; sternite 4 3 times as wide as long, and 2.3 times as wide as sternite 3. ABDOMEN. Somite 2 unarmed; somites 3–4 with 2 median spines on anterior ridge; posterior ridge of somite 4 with median small spine. Somites 2–3 each with 3 transverse ridges and several scales in addition to anterior ridge. Somite 4 with a few striae. EYES. Eyes large, maximum corneal diameter half distance between bases of anterolateral spines. ANTENNULE. Article 1 (distal spines excluded) about one-third carapace length, elongate, slightly exceeding end of corneae, with 2 short distal spines, mesial spine shorter than lateral spine; lateral margin unarmed, bearing numerous long plumose setae. ANTENNA. Article 1 with prolonged, strong mesial process, slightly exceeding antennular peduncle, lateral border with numerous long plumose setae; article 2 with 2 subequal distal spines, barely reaching end of article 3; article 3 with small distomesial and distolateral spine; ultimate segment unarmed. MXP3. Ischium about 1.5 times length of merus, distoventrally bearing spine. Merus with well-developed median spine on flexor margin, extensor margin unarmed. P1. Squamous, with dense short setae on scales, with scattered long setae, length 3.0–3.5 times that of carapace. Merus slightly longer than carpus, armed with some mesial spines, distalmost strongest. Carpus slightly longer than palm, 3 times as long as wide, with several spines along mesial margin. Palm slightly longer than fingers, unarmed. Fingers unarmed, distally curving and crossing, ending in a sharp point. P2–4. Moderately long and slender, squamous, with dense short setae on scales, with some long iridescent setae along extensor margins of all articles. P2 twice carapace length. Meri successively shorter posteriorly (P3 merus 0.7 length of P2 merus, P4 merus 0.7 times length of P3 merus); P2 merus as long as carapace, 5.5–6.0 times as long as wide, 1.7–1.8 times as long as P2 propodus; P3 merus 4.2–4.5 times as long as wide, 1.5 times as long as than P3 propodus; P4 merus 3.5 times as long as wide, 1.3 times as long as P4 propodus. Extensor margins of meri with row of small, proximally diminishing, spines on P2–3, distal spine only on P4; flexor margins with distal spines followed proximally by several eminences; lateral sides unarmed. Carpi with several spines on extensor margin; flexor margin ending in blunt point. Propodi 4.0–4.5 times as long as wide; extensor margin unarmed; flexor margin with 5–7 slender movable spines, without fixed distal spine. Dactyli slender, length 0.8–0.9 times that of propodi; flexor margin with 2–4 movable spinules along entire length; dactylus 6 times as long as wide. Genetic data Sequence data for COI, 16S and PEPCK could be included. The greatest discrimination was shown by COI, with the smallest pairwise sequence divergence of 4.86% between T. aequabilis sp. nov. and T. lupi sp. nov., and the highest (15.42%) between T. aequabilis and T. calvata. Torbenella aequabilis was a sister species of T. orbis (pp = 0.9; Fig. 7). Distribution New Caledonia, between depths of 388 and 403 m. Remarks The new species is morphologically closely related to T. calvata (Macpherson, 2006) and T. crateris sp. nov. from New Caledonia, having the abdominal somite 2 unarmed. Characters distinguishing these species are outlined under the account of T. crateris (see below).Published as part of Macpherson, Enrique, Rodríguez-Flores, Paula C. & Machordom, Annie, 2023, Integrative approach to describe new species of squat lobsters of the genera Heteronida Baba & de Saint Laurent, 1996 and Torbenella Baba, 2008 (Decapoda, Munididae) from the Southwestern Pacific Ocean, pp. 116-140 in European Journal of Taxonomy 860 (1) on pages 122-123, DOI: 10.5852/ejt.2023.860.2055, http://zenodo.org/record/768943
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