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1,404 results for “Indo-West Pacific”
Figure 2. Axius acanthus mauritiana Bouvier, 1914 in The Indo-West Pacific species of Neaxiopsis and Neaxius (Crustacea: Axiidea: Strahlaxiidae)
Figure 2. Axius acanthus mauritiana Bouvier, 1914, syntype, MNHN IU-2014-11317: a, dorsal view; b, lateral left view; c, telson and uropods. Syntypes, MNHN IU-2014-11318: d, dorsal views; e, lateral views, f, telsons and uropods.
Figure 9 in The Indo-West Pacific species of Neaxiopsis and Neaxius (Crustacea: Axiidea: Strahlaxiidae)
Figure 9. Distribution of four species of Neaxius in the Indo-West Pacific (based on material examined).
Figure 6 in The Indo-West Pacific species of Neaxiopsis and Neaxius (Crustacea: Axiidea: Strahlaxiidae)
Figure 6. Neaxius capricornicus sp. nov., holotype, NMV J39643: a, lateral carapace, merus of cheliped; b, anterior carapace; c, telson; d, telson, right uropod; e, f, pereopods 2, 3. Paratype, NMV J71643: g, pereopod 4; h, habitus lateral; i, dorsal carapace j, telson and uropods. All pereopods, lateral faces. Scale bars = 5 mm.
Fig. 6 in Two new species of shrimp of the Indo-West Pacific genus Hamodactylus Holthuis, 1952 (Crustacea: Decapoda: Palaemonidae)
Fig. 6. Hamodactylus pseudaqabai sp. nov., ovigerous ♀, holotype (PoCL 2.0 mm, N. Sulawesi, RMNH.
Fig. 1 in Two new species of shrimp of the Indo-West Pacific genus Hamodactylus Holthuis, 1952 (Crustacea: Decapoda: Palaemonidae)
Fig. 1. Hamodactylus paraqabai sp. nov., ovigerous ♀, holotype (PoCL 1.5 mm; Madang, Papua New
Dispersals from the West Tethys as the source of the Indo-West Pacific diversity hotspot in comatulid crinoids
<p>Conspicuous centers of biodiversity are frequently attributed to local conditions that promote speciation or resistance to extinction, but recent diversification studies indicate this mode of explanation might not be very general, so it may be fruitful to revisit the role of dispersal in concentrating biodiversity. Here we consider the processes underlying the marine diversity hotspot in the Indo-West Pacific among comatulid crinoids, suspension-feeding echinoderms conspicuous on modern tropical reefs. We used ancestral range reconstruction on a phylogeny of extant crinoids, assembled a new occurrence database of fossil comatulids and interrogated it with probabilistic preservational models, and developed a morphological character matrix to estimate the relationships among living and fossil comatulids. Ancestral range reconstruction on a phylogeny of extant comatulids recovers an origin outside the Indo-Pacific and elevated dispersal into it. A new occurrence database records the comatulid clade spreading out gradually from origin in the Early Jurassic of the West Tethys. They do not appear in their modern hotspot until the Oligocene, and taphonomic analyses show these results cannot be explained solely as a result of inadequate sampling in Asia and Oceania. Finally, phylogenetic analyses demonstrate that deeply nested crown-group comatulids had originated before the clade became well-established in the East Tethys, implying many independent dispersals into the modern hotspot. These consilient results suggest a biodiversity hotspot that owes its existence to dispersals out of the ancient West Tethys rather than to elevated <em>in situ </em>diversification.</p>
Figure 1 in A new asterinid genus from the Indo-West Pacific region, including five new species (Echinodermata: Asteroidea: Asterinidae)
Figure 1. Distributions of the type localities of the six species of Ailsastra gen. nov.
Fig. 5 in A new genus and three new species of mangrove slugs from the Indo-West Pacific (Mollusca: Gastropoda: Euthyneura: Onchidiidae)
Fig. 5. Diagram that helps to visualize the data on pairwise genetic distances between COI sequences within and between mitochondrial units in Paromoionchis gen. nov. (see Table 3). Ranges of minimum to maximum distances are indicated (in percentages). For instance, within P. tumidus (Semper, 1880) unit #1, individual sequences are between 0 and 3.2% divergent; individual sequences between P. tumidus unit #1 and the other units are minimally 5% and maximally 8.4% divergent; overall, the distance gap between P. tumidus unit #1 and the eight other units is between 3.2 and 5%. The colors used for each unit are the same as those used in Figs 1–4 and 6.
Fig. 4. Maximum parsimony consensus tree within Paromoionchis gen. nov., performed with ITS2 DNA sequences from 80 in A new genus and three new species of mangrove slugs from the Indo-West Pacific (Mollusca: Gastropoda: Euthyneura: Onchidiidae)
Fig. 4. Maximum parsimony consensus tree within Paromoionchis gen. nov., performed with ITS2 DNA sequences from 80 individuals (including 7 outgroups). Numbers by the branches are the bootstrap values (only numbers> 50% are indicated). Numbers for each individual correspond to unique identifiers for DNA extraction. All sequences for specimens of Paromoionchis gen. nov. are new. Information on specimens can be found in the lists of material examined and in Table 1. The letter A corresponds to a clade referred to in the text. The color used for each (mitochondrial) unit is the same as that used in Figs 1–3 and 5–6.
Fig. 3. Maximum parsimony consensus tree within Paromoionchis gen. nov., performed with concatenated ITS2 and 28S DNA sequences from 41 in A new genus and three new species of mangrove slugs from the Indo-West Pacific (Mollusca: Gastropoda: Euthyneura: Onchidiidae)
Fig. 3. Maximum parsimony consensus tree within Paromoionchis gen. nov., performed with concatenated ITS2 and 28S DNA sequences from 41 individuals (including 7 outgroups). Numbers by the branches are the bootstrap values (only numbers> 50% are indicated). Numbers for each individual correspond to unique identifiers for DNA extraction. All sequences for specimens of Paromoionchis gen. nov. are new. Information on specimens can be found in the lists of material examined and in Table 1. Letters A and B correspond to clades referred to in the text. The color used for each (mitochondrial) unit is the same as that used in Figs 1–2 and 4–6.
Figure 22. Periclimenes involens Bruce, 1996 in Further Indo-West Pacific palaemonoid shrimps (Crustacea: Decapoda: Palaemonoidea), principally from the New Caledonian region
Figure 22. Periclimenes involens Bruce, 1996, ovigerous female (MNHN-Na 14912), carapace.
Figure 30. A–I, Serpula nudiradiata n in Descriptions of New Serpulid Polychaetes from the Kimberleys of Australia and Discussion of Australian and Indo-West Pacific Species of Spirobranchus and Superficially Similar Taxa
Figure 30. A–I, Serpula nudiradiata n.sp., from holotype, AM W202942: (A–E)
Figure 25. A–C, Hydroides trihamulatus n in Descriptions of New Serpulid Polychaetes from the Kimberleys of Australia and Discussion of Australian and Indo-West Pacific Species of Spirobranchus and Superficially Similar Taxa
Figure 25. A–C, Hydroides trihamulatus n.sp.—an older specimen from AM W202943: (A) anterior end
Figure 18. A–J, Hydroides simplidentatus n in Descriptions of New Serpulid Polychaetes from the Kimberleys of Australia and Discussion of Australian and Indo-West Pacific Species of Spirobranchus and Superficially Similar Taxa
Figure 18. A–J, Hydroides simplidentatus n.sp., from holotype AM W21415. (A) anterior end of
FIGURE 8 in The Agauopsis brevipalpus group (Acari: Halacaridae), descriptions of tropical Indo-West Pacific species, a key to all species, their geographical distribution and reflections on dispersal routes
FIGURE 8: Present day records of species of the Agauopsis brevipalpus group with three (circle) and four spines (quadrat) on telofemur I plotted on a map with Lower Jurassic land masses (solid line), ca 180 my ago (present-day plates in dotted line). A record from the Society Islands is omitted. (Lower Jurassic map modified from Howarth 1981; Vaughan & Livermore 2005; Stevens 2012).
FIGURE 7 in The Agauopsis brevipalpus group (Acari: Halacaridae), descriptions of tropical Indo-West Pacific species, a key to all species, their geographical distribution and reflections on dispersal routes
FIGURE 7: Geographical distribution of named and unnamed species of the Agauopsis brevipalpus group. Different symbols are used depending on number of spines on telofemur I. Species with one or two spines are marked by a diamond: (1, collaris; 2, rosea; X, Agauopsis sp.); with three spines by a circle: (1, filirostris; 2, glabra; 3, ivanomorselii; 4, luxtoni; 5, newelli; 6, novaezelandiae; 7, reticulata); with four spines by a quadrat (1, arabia; 2, arborea; 3, atacamae; 4, borealis; 5, brevipalpus; 6, dissimilis; 7, ibssi; 8, legionium; 9, littoralis;10, longirostris; 11, moorea; 12, obtusa; 13, ripa; 14, sordida; 15, youngilensis; X, Agauopsis sp.); with five or more spines by a triangle (1, tricuspis; X, Agauopsis sp.).
FIGURE 2 in The Agauopsis brevipalpus group (Acari: Halacaridae), descriptions of tropical Indo-West Pacific species, a key to all species, their geographical distribution and reflections on dispersal routes
FIGURE 2: Agauopsis dissimilis n.sp.: A – median part of PD level with ds-5, female; B – idiosoma, dorsal, female; C – idiosoma, ventral, female; D – gnathosoma, ventral, female; E – lateral margin of OC, female; F – gnathosomal base, dorsal, female; G – palp, lateral, female; H – AD, OC and PD, dorsal, male; I – idiosoma, ventral, male; J – genitoanal plate, male. (ds-5, fifth dorsal seta; glp, gland pore; L-Ba, length of gnathosomal base; L-Ro, length of rostrum; pa, porose areola; pc, pore canaliculus) Scale line = 50 µm
FIGURE 5 in The Agauopsis brevipalpus group (Acari: Halacaridae), descriptions of tropical Indo-West Pacific species, a key to all species, their geographical distribution and reflections on dispersal routes
FIGURE 5: Agauopsis ripa Otto, 1999, male: A – lateral margin of OC; B – genitoanal plate; C – gnathosoma, ventral; D – P-3 and P-4; E – tip of tarsus I, ventromedial; F – tip of tarsus II, ventromedial (one of lateral parambulacral setae obscured, the other in broken line); G – tip of tarsus III, ventral. (T, tectum) Scale line = 50 µm.
FIGURE 6 in The Agauopsis brevipalpus group (Acari: Halacaridae), descriptions of tropical Indo-West Pacific species, a key to all species, their geographical distribution and reflections on dispersal routes
FIGURE 6: Agauopsis sordida Bartsch, 1992: A – idiosoma, dorsal, female; B – idiosoma, ventral, female; C – lateral margin of OC, female; D – genitoanal plate, male; E – idiosoma, dorsal, male; F – idiosoma, ventral, male; G – gnathosoma, ventral, female. (pa, porose areola; spp, spermatopositor) Scale line = 50 µm.
FIGURE 1 in The Agauopsis brevipalpus group (Acari: Halacaridae), descriptions of tropical Indo-West Pacific species, a key to all species, their geographical distribution and reflections on dispersal routes
FIGURE 1: Agauopsis arabia Bartsch and Chatterjee, 2001: A – idiosoma, dorsal, female; B – lateral margin of OC, male; C – gnathosomal base, dorsal, female; D – gnathosoma, lateral, female; E – tip of tarsus IV, ventral, female. (glp, gland pore; pa, porose areola; pc, pore canaliculus; T, tectum) Scale line = 50 µm.
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Allen Brain Atlas
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