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94 results for “anaspid”
Figure 10 in A New Species of Tasmanian Mountain Shrimp, Anaspides driesseni sp. nov. (Malacostraca, Anaspidacea, Anaspidesidae)
Figure 10. Typical habitats and colour-in-life of A. driesseni: (A) Glen Dhu Creek (B) Knights Creek at Knights Creek Track (C) small trickle fed road side ditch, next to Collins Cap Trail (D) unnamed creek, tributary of Styx River, crossing the road off Waterfall Creek Road (E) adult male, 35 mm, Ana560, unnamed creek, tributary of Styx River, crossing the road off Waterfall Creek Road. (F) adult male, 29 mm, AM P106559, unnamed creek, tributary of Styx River, crossing the road off Waterfall Creek Road.
Figure 7 in A New Species of Tasmanian Mountain Shrimp, Anaspides driesseni sp. nov. (Malacostraca, Anaspidacea, Anaspidesidae)
Figure 7. Distribution map of A. swaini and A. driesseni with important drainage divides (1) Franklin-Gordon; (2) Derwent; (3) Huon; (4) Port Davey; and (5) North West Bay River. Light brownish background colour indicates National Parks. (A) detailed view of Snowy Range, see Fig. 8; (B) detailed view of Wellington Park, see Fig. 9. Modified after the Tasmania catchments map. https://dpipwe.tas.gov. au/Documents/Tasmania-Catchment-Map.pdf
Figure 3 in A New Species of Tasmanian Mountain Shrimp, Anaspides driesseni sp. nov. (Malacostraca, Anaspidacea, Anaspidesidae)
Figure 3. Anaspides driesseni sp. nov., (A–L) male holotype, 32 mm, Myrtle Forest Creek, Wellington Range, TMAG G6403; (M–N), female, 34 mm, Mount Wellington, AM P9218. (A) right thoracopod 1 (maxilliped); (B–H) right thoracopods 2–8, respectively; (I) right pleopod 4, anterior view; (J–L) pleonites 3–5 median sternal processes, respectively; (M, N) female gonopore, right lateral and ventral views, respectively. Scale 2.0 mm.
Figure 4 in A New Species of Tasmanian Mountain Shrimp, Anaspides driesseni sp. nov. (Malacostraca, Anaspidacea, Anaspidesidae)
Figure 4. Anaspides driesseni sp. nov. selected features. (A–E) juv. male, 28 mm, Myrtle Forest, AM P106558; (F–H) juv. male, 29 mm, Myrtle Forest, AM P106558 (I–J) male, 28 mm, Mt Fenton, TMAG G6407. (A, F) anterior cephalothorax. (B) telson with uropods. (C) scaphocerite. (G, I) telson. (D) pleonal pleura. (E) right antennule with clasping spines. (H, J) left antennule with clasping spines. Scale: A–D, F, G, I = 2.0 mm, E, H, J = 1.0 mm.
Figure 5 in A New Species of Tasmanian Mountain Shrimp, Anaspides driesseni sp. nov. (Malacostraca, Anaspidacea, Anaspidesidae)
Figure 5. Dorsal view on the antenna of male A. driesseni sp. nov. (A–C) Snowy North, unnamed tributary of Styx River crossing the road off Waterfall Creek Road, ZSRO CR183; (A) 35 mm, right antenna; (B) Ana 560, 35 mm, right antenna, with 4 abnormal clasping spines, highlighted with white outlines; (C) Ana 560, 35 mm, left antenna; (D) right antenna, 29 mm, Knights Creek, Wellington Range, ZSRO CR179. Scale bars: 1 mm.
Figure 6. COI, 16S and 28S in A New Species of Tasmanian Mountain Shrimp, Anaspides driesseni sp. nov. (Malacostraca, Anaspidacea, Anaspidesidae)
Figure 6. COI, 16S and 28S median joining haplotype networks of Anaspides driesseni. Colours correspond to figure legend. The size of each haplotype corresponds to the number of individuals sharing that specific haplotype (see scale). Each dash corresponds to one mutation respectively indel.
Figure 2 in A New Species of Tasmanian Mountain Shrimp, Anaspides driesseni sp. nov. (Malacostraca, Anaspidacea, Anaspidesidae)
Figure 2. Anaspides driesseni sp. nov., male holotype, 32 mm, Myrtle Forest Creek, Wellington Range, TMAG G9228. (A) anterior cephalothorax, dorsal view; (B) pleonite 6, telson and right uropod; (C) pleonite 6 and telson; (D–F) pleonites 4–6 pleura, right lateral view; (G) right antennule; (H) right antenna; (I) labrum, anterior view; (J) right mandible; (K) right mandible incisor process; (L) left mandible incisor process; (M) paragnaths, anterior view; (N) right maxillule; (O) right maxilla; (P) pleopods 1–2, in-situ, ventral view; (Q–R) right pleopod 1 endopod, lateral view and dorsal view, respectively; (S) right pleopod 2 endopod, lateral view. Scale: A, B, D–H, P–S = 2.0 mm, C, I–O = 1.0 mm.
Figure 1 in A New Species of Tasmanian Mountain Shrimp, Anaspides driesseni sp. nov. (Malacostraca, Anaspidacea, Anaspidesidae)
Figure 1. Anaspides driesseni sp. nov., male holotype, 32 mm, Myrtle Forest Creek, Wellington Range, TMAG G9228. Habitus, right lateral view. Scale = 2.0 mm.
Figure 36 in The Tasmanian Mountain Shrimps, Anaspides Thomson, 1894 (Crustacea, Syncarida, Anaspididae)
Figure 36. Distribution of Anaspides. Dubious Orford record of A. swaini indicated by "?".
Figure 8 in A New Species of Tasmanian Mountain Shrimp, Anaspides driesseni sp. nov. (Malacostraca, Anaspidacea, Anaspidesidae)
Figure 8. Topographical map of Snowy Range with major drainage
FIGURE 1. A–D in Preliminary diagnoses of three new species of Tasmanian mountain shrimps, Anaspides Thomson, 1894 (Syncarida, Anaspidacea, Anaspididae)
FIGURE 1. A–D, Anaspides clarkei sp. nov., holotype male, male (29 mm), Exit Cave, Ida Bay Karst (SAM BS1848a); E–H, Anaspides jarmani sp. nov., holotype male, 24 mm, Adamson's Peak, Hartz Mountains National Park (AM P73039); I–L, Anaspides swaini sp. nov., holotype male (27 mm), Weld River (AM P73042). A, D, G, anterior cephalothoorax, dorsal view; B, F, J, right antennule, dorsal view; C, G, K, right male pleopod 1, lateral view; D, H, L, telson, posterior portion. Scale: A = 0.7 mm, B–D = 1.4 mm; H, L = 0.5 mm, F–H, J–L, I =1.0 mm.
Data from: Histology and affinity of anaspids, and the early evolution of the vertebrate dermal skeleton
The assembly of the gnathostome bodyplan constitutes a formative episode in vertebrate evolutionary history, an interval in which the mineralized skeleton and its canonical suite of cell and tissue types originated. Fossil jawless fishes, assigned to the gnathostome stem-lineage, provide an unparalleled insight into the origin and evolution of the skeleton, hindered only by uncertainty over the phylogenetic position and evolutionary significance of key clades. Chief among these are the jawless anaspids, whose skeletal composition, a rich source of phylogenetic information, is poorly characterized. Here we survey the histology of representatives spanning anaspid diversity and infer their generalized skeletal architecture. The anaspid dermal skeleton is composed of odontodes comprising spheritic dentine and enameloid, overlying a basal layer of acellular parallel fibre bone containing an extensive shallow canal network. A recoded and revised phylogenetic analysis using equal and implied weights parsimony resolves anaspids as monophyletic, nested among stem-gnathostomes. Our results suggest the anaspid dermal skeleton is a degenerate derivative of a histologically more complex ancestral vertebrate skeleton, rather than reflecting primitive simplicity. Hypotheses that anaspids are ancestral skeletonizing lampreys, or a derived lineage of jawless vertebrates with paired fins, are rejected.
Figure 20 in The Tasmanian Mountain Shrimps, Anaspides Thomson, 1894 (Crustacea, Syncarida, Anaspididae)
Figure 20. Anaspides richardsoni sp. nov. (A–P) holotype male, 33 mm, Mt Field, AM P72839; (Q–R) paratype female, 32 mm, Mt Field, AM P72840;(A) right thoracopod 1 (maxilliped); (B–H) right thoracopods 2–8; (I–J) right pleopod 1 endopod, lateral and ventral views; (K–L) right pleopod 2 endopod, lateral and ventral views; (M) right pleopod 5, anterior view; (N–P) pleonites 3–5 median sternal processes; (Q–R) female gonopore, right lateral and ventral views. Scale A–M = 2.0 mm; N–R = 1.0 mm.
Data from: Histology and affinity of anaspids, and the early evolution of the vertebrate dermal skeleton
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