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20 results for “spiny crayfish”
Figure 3. from Euastacus morgani sp. n., a new spiny crayfish (Crustacea, Decapoda, Parastacidae) from the highland rainforests of eastern New South Wales, Australia - ZooKeys 85: 17-26 (11 March 2011) https://doi.org/10.3897/zookeys.85.1237
Figure 3. - Location of the type locality (black square) on the northern margin of Bindarri National Park, in central eastern Australia.
Figure 2. from Euastacus morgani sp. n., a new spiny crayfish (Crustacea, Decapoda, Parastacidae) from the highland rainforests of eastern New South Wales, Australia - ZooKeys 85: 17-26 (11 March 2011) https://doi.org/10.3897/zookeys.85.1237
Figure 2. - Euastacus morgani sp. n. Dorsal view of body A and cheliped B, holotype specimen, AM P.84263. Dorsal view of antennal squame C, lateral view of third maxilliped D and ventral view of left hand side of cephalon showing interantennal scale E, specimen ACP 1103. Scale bars = 5 mm.
Figure 1. from Euastacus morgani sp. n., a new spiny crayfish (Crustacea, Decapoda, Parastacidae) from the highland rainforests of eastern New South Wales, Australia - ZooKeys 85: 17-26 (11 March 2011) https://doi.org/10.3897/zookeys.85.1237
Figure 1. - Euastacus morgani sp. n. Female specimen, ACP 1103.
Data from: Australian spiny mountain crayfish and their temnocephalan ectosymbionts: an ancient association on the edge of coextinction?
Australian spiny mountain crayfish (Euastacus, Parastacidae) and their ecotosymbiotic temnocephalan flatworms (Temnocephalida, Platyhelminthes) may have co-occurred and interacted through deep time, during a period of major environmental change. Therefore, reconstructing the history of their association is of evolutionary, ecological, and conservation significance. Here, time-calibrated Bayesian phylogenies of Euastacus species and their temnocephalans (Temnohaswellia and Temnosewellia) indicate near-synchronous diversifications from the Cretaceous. Statistically significant cophylogeny correlations between associated clades suggest linked evolutionary histories. However, there is a stronger signal of codivergence and greater host specificity in Temnosewellia, which co-occurs with Euastacus across its range. Phylogeography and analyses of evolutionary distinctiveness (ED) suggest that regional differences in the impact of climate warming and drying had major effects both on crayfish and associated temnocephalans. In particular, Euastacus and Temnosewellia show strong latitudinal gradients in ED and, conversely, in geographical range size, with the most distinctive, northern lineages facing the greatest risk of extinction. Therefore, environmental change has, in some cases, strengthened ecological and evolutionary associations, leaving host-specific temnocephalans vulnerable to coextinction with endangered hosts. Consequently, the extinction of all Euastacus species currently endangered (75%) predicts coextinction of approximately 60% of the studied temnocephalans, with greatest loss of the most evolutionarily distinctive lineages.
FIGURE 6 in Euastacus vesper sp. nov., a new giant spiny crayfish (Crustacea, Decapoda, Parastacidae) from the Great Dividing Range, New South Wales, Australia
FIGURE 6. Euastacus vesper sp. nov., Cudgegong River. A–B, male holotype (OCL 64.74 mm), AM P P99506. C–D, male paratype (OCL 46.78 mm), ACP 1135. E–F, female paratype (OCL 46.78 mm), AM P99541. G–H, female paratype (OCL 15.27 mm), ACP 1131. A, C, E, G, rostrum. B, H, right antenna and interantennal spine, ventral view. D–F, interantennal spine, ventral view. Scale =5.0 mm.
FIGURE 5 in Euastacus vesper sp. nov., a new giant spiny crayfish (Crustacea, Decapoda, Parastacidae) from the Great Dividing Range, New South Wales, Australia
FIGURE 5. Euastacus vesper sp. nov., dorsal habitus and carapace (right lateral view). A–B, male paratype, OCL 46.78 mm, Cudgegong River, AM P99541; C–D, female paratype, OCL 42.74 mm, Cudgegong River, AM P99507.
FIGURE 4 in Euastacus vesper sp. nov., a new giant spiny crayfish (Crustacea, Decapoda, Parastacidae) from the Great Dividing Range, New South Wales, Australia
FIGURE 4. Euastacus vesper sp. nov., male holotype (OCL 64.74 mm), Cudgegong River, AM P99506. A, anterior cephalothorax, ventral view; B, left first chela, dorsal view; C–D, right first chela, dorsal and ventral views; E, right maxilliped 3; F, cephalothorax, ventral view,
FIGURE 2 in Euastacus vesper sp. nov., a new giant spiny crayfish (Crustacea, Decapoda, Parastacidae) from the Great Dividing Range, New South Wales, Australia
FIGURE 2. Euastacus vesper sp. nov., male holotype (OCL 64.74 mm), Cudgegong River, AM P99506. A, dorsal habitus; B, ventral habitus.
FIGURE 3 in Euastacus vesper sp. nov., a new giant spiny crayfish (Crustacea, Decapoda, Parastacidae) from the Great Dividing Range, New South Wales, Australia
FIGURE 3. Euastacus vesper sp. nov., male holotype (OCL 64.74 mm), Cudgegong River, AM P99506. A, carapace, dorsal view; B, carapace, right lateral view; C, abdomen, right oblique view; D, abdomen, right lateral view; E, telson and uropods, dorsal view.
FIGURE 1 in Euastacus vesper sp. nov., a new giant spiny crayfish (Crustacea, Decapoda, Parastacidae) from the Great Dividing Range, New South Wales, Australia
FIGURE 1. Euastacus vesper sp. nov. A, known distribution; B, male holotype (OCL 64.74 mm), Cudgegong River, AM P99506; C, same, with ectocommensal temnocephalans; D, male paratype, Cudgegong River, ACP1130; E, habitat in upper Cudgegong River, Coricudgy State Forest, NSW.
FIGURE 5. Euastacus clydensis Riek, 1969. A in Redescription of Euastacus clydensis Riek, 1969 (Crustacea: Parastacidae), a valid species of spiny crayfish from southern New South Wales, Australia
FIGURE 5. Euastacus clydensis Riek, 1969. A, distribution, sampling locations (green) in Moss Vale, Jervis Bay and Batemans Bay (grey shading: the Murray-Darling Basin; dark blue dashed lines: South East Coast Drainage river catchments; and light blue lines indicate major rivers); B–D, foraging individuals and habitat, Quart Pot Creek, tributary of Buckenbowra River (specimens not collected); E, habitat, Carters Creek, tributary of Buckenbowra River.
FIGURE 4. A in Redescription of Euastacus clydensis Riek, 1969 (Crustacea: Parastacidae), a valid species of spiny crayfish from southern New South Wales, Australia
FIGURE 4. A, Euastacus clydensis Riek, 1969, male holotype (OCL 73.37 mm), Clyde River, NSW, AM P15491, right antenna (ventral view); B, E. clydensis Riek, 1969, male, OCL 71.85 mm, Currowan Creek, NSW, ACP4767, right scaphocerite (ventral view); C, E. spinifer (Heller, 1865), female, OCL 73.43 mm, Waterfall, NSW, AM G1502, right scaphocerite (ventral view).
FIGURE 3. Euastacus clydensis Riek, 1969 in Redescription of Euastacus clydensis Riek, 1969 (Crustacea: Parastacidae), a valid species of spiny crayfish from southern New South Wales, Australia
FIGURE 3. Euastacus clydensis Riek, 1969, male holotype (OCL 73.37 mm), Clyde River, NSW, AM P15491: A, anterior cephalothorax including epistome, ventral view; B, left first chela, dorsal view; C–D, right first chela, dorsal and ventral views; E, right maxilliped 3; F, cephalothorax, ventral view.
FIGURE 2. Euastacus clydensis Riek, 1969 in Redescription of Euastacus clydensis Riek, 1969 (Crustacea: Parastacidae), a valid species of spiny crayfish from southern New South Wales, Australia
FIGURE 2. Euastacus clydensis Riek, 1969, male holotype (OCL 73.37 mm), Clyde River, NSW, AM P15491: A, carapace, dorsal view; B, carapace, right lateral view; C, abdomen, right oblique dorsal view; D, abdomen, right lateral view; E, telson and uropods, dorsal view.
FIGURE 6 in Redescription of Euastacus clydensis Riek, 1969 (Crustacea: Parastacidae), a valid species of spiny crayfish from southern New South Wales, Australia
FIGURE 6. Maximum likelihood phylogeny inferred from mitochondrial COI sequence data of Euastacus spinifer (Heller, 1865), E. vesper McCormack & Ahyong, 2017, E. clydensis Riek, 1969. Values on nodes correspond to bootstrap percentages (>75%) and posterior probabilities (>0.95).
FIGURE 1. Euastacus clydensis Riek, 1969 in Redescription of Euastacus clydensis Riek, 1969 (Crustacea: Parastacidae), a valid species of spiny crayfish from southern New South Wales, Australia
FIGURE 1. Euastacus clydensis Riek, 1969, male holotype (OCL 73.37 mm), Clyde River, NSW, AM P15491: A) dorsal habitus; B) ventral habitus.
Data from: Australian spiny mountain crayfish and their temnocephalan ectosymbionts: an ancient association on the edge of coextinction?
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Figure 2 from: Coughran J, McCormack R (2011) Euastacus morgani sp. n., a new spiny crayfish (Crustacea, Decapoda, Parastacidae) from the highland rainforests of eastern New South Wales, Australia. ZooKeys 85: 17-26. https://doi.org/10.3897/zookeys.85.1237
Figure 2 - Euastacus morgani sp. n. Dorsal view of body A and cheliped B, holotype specimen, AM P.84263. Dorsal view of antennal squame C, lateral view of third maxilliped D and ventral view of left hand side of cephalon showing interantennal scale E, specimen ACP 1103. Scale bars = 5 mm.
Figure 3 from: Coughran J, McCormack R (2011) Euastacus morgani sp. n., a new spiny crayfish (Crustacea, Decapoda, Parastacidae) from the highland rainforests of eastern New South Wales, Australia. ZooKeys 85: 17-26. https://doi.org/10.3897/zookeys.85.1237
Figure 3 - Location of the type locality (black square) on the northern margin of Bindarri National Park, in central eastern Australia.
Figure 1 from: Coughran J, McCormack R (2011) Euastacus morgani sp. n., a new spiny crayfish (Crustacea, Decapoda, Parastacidae) from the highland rainforests of eastern New South Wales, Australia. ZooKeys 85: 17-26. https://doi.org/10.3897/zookeys.85.1237
Figure 1 - Euastacus morgani sp. n. Female specimen, ACP 1103.
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