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94 results for “freshwater crayfish”
FIGURE 5 in Two new species of South American freshwater crayfish genus Parastacus Huxley, 1879 (Crustacea: Decapoda: Parastacidae)
FIGURE 5. Parastacus fluviatilis Ribeiro & Buckup sp. nov. habitat and live specimens. A, Silveira river; B, Tipic habitat, an affluent of Silveira river; C, sealed chimney at margin of Silveira river; D, tipical oppening of burrows; E, living specimen walking among vegetation at margin of Silveira river; F, living specimen, showing colour pattern. Photo A by Kelly M. Gomes. All other photos by Felipe B. Ribeiro.
FIGURE 4 in Two new species of South American freshwater crayfish genus Parastacus Huxley, 1879 (Crustacea: Decapoda: Parastacidae)
FIGURE 4. Parastacus fluviatilis Ribeiro & Buckup sp. nov., holotype and paratypes: A, epistome (holotype); B, thoracic sternites and gonopores (holotype); C, thoracomere 8, caudal view (holotype); D, antennal scale lateral view (paratype 1); Emandible (paratype 1); F—third maxilliped ventral view (paratype 1); G—third maxilliped dorsal view (paratype 1); H—first pereiopod lateral view (holotype); F, first pereiopod dorsal view (holotype); G, second pereiopod lateral view (holotype). Scale bars: A, C—2.5 mm; B, J—5 mm; D, E—2 mm; F, G—5 mm; H, I—1 cm.
FIGURE 3 in Two new species of South American freshwater crayfish genus Parastacus Huxley, 1879 (Crustacea: Decapoda: Parastacidae)
FIGURE 3. Parastacus fluviatilis Ribeiro & Buckup sp. nov., holotype and paratypes: A, habitus dorsal view (holotype); B, cephalon dorsal view (holotype); C, cephalon lateral view (holotype); D, female abdominal somites dorsal view (paratype 1); E, first and second abdominal pleura (holotype); F, first and second abdominal pleura (paratype 1); G, tailfan (holotype). Scale bars: A—1.5 cm; B, C, E, F, G—5 mm; 5mm; D—1.3 cm.
FIGURE 1 in Two new species of South American freshwater crayfish genus Parastacus Huxley, 1879 (Crustacea: Decapoda: Parastacidae)
FIGURE 1. Main measurements used in the descriptions of new species of genus Parastacus Huxley, 1879 in present contribution. For abbreviations see Material and Methods section and Table I.
FIGURE 2 in Two new species of South American freshwater crayfish genus Parastacus Huxley, 1879 (Crustacea: Decapoda: Parastacidae)
FIGURE 2. Distribution of Parastacus fluviatilis Ribeiro & Buckup sp. nov. and Parastacus caeruleodactylus Ribeiro & Araujo sp. nov in state of Rio Grande do Sul, southern Brazil.
Supplementary material 1 from: McCormack R (2014) The eastern swamp crayfish Gramastacus lacus sp. n. (Decapoda, Parastacidae) a new species of freshwater crayfish from coastal New South Wales, Australia. ZooKeys 398: 53-67. https://doi.org/10.3897/zookeys.398.7544
Gramastacus lacus specimen data.: Explanation note: Specimen record with locality details for known populations of the eastern swamp crayfish Gramastacus lacus sp. n., in coastal New South Wales.
FIGURE 5 in Two new species of freshwater crayfish of the genus Faxonius (Decapoda: Cambaridae) from the Ozark Highlands of Arkansas and Missouri
FIGURE 5. Photo of the type locality of Faxonius roberti, new species, taken on the mainstem of the Spring River, 135 meters upstream of the Bayou Access boat ramp (36.433959, -91.527190,WGS84).
FIGURE 4 in Two new species of freshwater crayfish of the genus Faxonius (Decapoda: Cambaridae) from the Ozark Highlands of Arkansas and Missouri
FIGURE 4. Faxonius roberti, new species; all from holotype male Form-I (CMNH 38749), except D and E from morphotype male Form-II (CMNH 38751), and I from allotype female (CMNH 38750). A) lateral aspect of carapace; B–C) mesial and lateral aspect of Form-I male gonopod, respectively; D–E) mesial and lateral views of Form-II male gonopod, respectively; F) mesial view of entire gonopod of male Form-I gonopod; G) dorsal aspect of antennal scale; H) dorsal veiw of carapace; I) ventral aspect of the female annulus ventralis; J) dorsal aspect of merus of first pereiopod (=cheliped) showing location of spines; K) dorsal aspect of distal podomeres of the right cheliped. Plate by Guenter A. Schuster.
FIGURE 3 in Two new species of freshwater crayfish of the genus Faxonius (Decapoda: Cambaridae) from the Ozark Highlands of Arkansas and Missouri
FIGURE 3. Dorsal view of Faxonius roberti new species, holotype, male form-I (CMNH 38749) from the type locality.
FIGURE 1 in Two new species of freshwater crayfish of the genus Faxonius (Decapoda: Cambaridae) from the Ozark Highlands of Arkansas and Missouri
FIGURE 1. Nonmetric Multidimensional Scaling (NMDS) graphs showing similarity among specimens. A). All specimens in the dataset, generated by dropping any ratios that were non-significant or sex-related. B). Females only, generated by dropping non-significant and male only ratios. C). Form-I males only and D). Form-II males only. Colored lines were drawn by hand and circumscribe the region that contains all of the data points for the indicated species.
FIGURE 7 in Two new species of freshwater crayfish of the genus Faxonius (Decapoda: Cambaridae) from the Ozark Highlands of Arkansas and Missouri
FIGURE 7. Faxonius wagneri, new species; all from holotype male Form-I (CMNH 38752), except D and E from morphotype male Form-II (CMNH 38754), and I from allotype female (CMNH 38753). A) lateral aspect of carapace; B–C) mesial and lateral aspect of Form-I male first pleopod, respectively; D–E) mesial and lateral views of Form-II male first pleopod, respectively; F) mesial view of entire first pleopod of male Form-I gonopod; G) dorsal aspect of antennal scale; H) dorsal veiw of carapace; I) ventral aspect of the female annulus ventralis; J) dorsal aspect of merus of first pereiopod (=cheliped) showing location of spines; K) dorsal aspect of distal podomeres of the right cheliped. Plate by Guenter A. Schuster.
FIGURE 2 in Two new species of freshwater crayfish of the genus Faxonius (Decapoda: Cambaridae) from the Ozark Highlands of Arkansas and Missouri
FIGURE 2. Bayesian phylogeny depicting relationships among the new species and several other members of the genus from the Ozark Highlands. Numbers at the nodes indicate bayesian posterior probabilities. Clades A and B as discussed in text.
FIGURE 6 in Two new species of freshwater crayfish of the genus Faxonius (Decapoda: Cambaridae) from the Ozark Highlands of Arkansas and Missouri
FIGURE 6. Dorsal view of Faxonius wagneri, new species, morphotype, male form-II (CMNH 38752) from near Dalton, Arkansas.
FIGURE 9. Faxonius eupunctus Williams, 1952 in Two new species of freshwater crayfish of the genus Faxonius (Decapoda: Cambaridae) from the Ozark Highlands of Arkansas and Missouri
FIGURE 9. Faxonius eupunctus Williams, 1952; all from a recently collected male Form-I (CMNH 38755), except D and E from a male Form-II (CMNH 38757), and I from a female (CMNH 38756). A) lateral aspect of carapace; B–C) mesial and lateral aspect of Form-I male first pleopod, respectively; D–E) mesial and lateral views of Form-II male first pleopod, respectively; F) mesial view of entire first pleopod of male Form-I gonopod; G) dorsal aspect of antennal scale; H) dorsal veiw of carapace; I) ventral aspect of the female annulus ventralis; J) dorsal aspect of merus of first pereiopod (=cheliped) showing location of spines; K) dorsal aspect of distal podomeres of the right cheliped. Plate by Guenter A. Schuster.
FIGURE 10 in Two new species of freshwater crayfish of the genus Faxonius (Decapoda: Cambaridae) from the Ozark Highlands of Arkansas and Missouri
FIGURE 10. Map showing the location of museum specimens lots that were examined and measured morphologically as part of this study. Faxonius roberti lots examined are shown as red open circles and the type locality is depicted as an open red circle with a cross. Recent historical locality records (specimens not measured) for F. roberti are indicated with black circles with squares. Faxonius wagneri lots are shown as purple closed circles and the type locality is indicated with a purple closed circle with a cross. Black circles with diamonds indicate other known localities for F. wagneri that were not measured as a part of this study. Black arrows indicate the location of the type localities for both species. Orange lines indicate county boundaries. Black lines indicated HUC8 watershed boundaries. Blue lines indicate major rivers. Map was generated using Google MyMaps.
FIGURE 8 in Two new species of freshwater crayfish of the genus Faxonius (Decapoda: Cambaridae) from the Ozark Highlands of Arkansas and Missouri
FIGURE 8. Photo of Eleven Point River just downstream of the Dalton boat ramp (36.421044, -91.139249,WGS84). This is the location where the morphotype of Faxonius wagneri was collected, just five kilometers south (downstream) of the type locality.
Data from: Introgression threatens the survival of the critically endangered freshwater crayfish Cherax tenuimanus (Decapoda : Parastacidae) in the wild
Hybridization and genetic introgression following the introduction of exotic species can pose a significant threat to the survival of geographically restricted species. A remnant population of the critically endangered freshwater crayfish Cherax tenuimanus in the upper reaches of the Margaret River in southwestern Australia is under threat following the introduction and spread of its congener Cherax cainii. Here, we examine the extent of hybridization and introgression between the two species using twelve polymorphic microsatellite loci. Our study reveals there are three times more C. cainii than C. tenuimanus at our study site in the upper reaches of the Margaret River. There is also evidence of hybridization and introgression between C. tenuimanus and C. cainii at this site, with F1, F2 and backcrossed individuals identified. While interbreeding was confirmed in this study, our simulations suggest that the levels of introgression are much lower than would be expected under random mating, indicating partial reproductive barriers exist. Nevertheless, it is apparent that hybridization and introgression with C. cainii pose a serious threat to C. tenuimanus and their survival in the wild will require active adaptive management and continued genetic monitoring to evaluate management effectiveness.
FIGURE 11 in Cherax latimanus sp. nov., a new burrow-dwelling freshwater crayfish (Decapoda Parastacidae) from the mid-Murray River catchment, Australia
FIGURE 11. Soil-capped burrow with (upper), and without (lower), embedded sticks, northern Millewa Forest, NSW, 12 January 2017 (Image: Dale McNeil).
FIGURE 10 in Cherax latimanus sp. nov., a new burrow-dwelling freshwater crayfish (Decapoda Parastacidae) from the mid-Murray River catchment, Australia
FIGURE 10. An almost completed burrow cap of moist soil, just north of Euroa and east of Hume Freeway (area now under freeway fuel station), 24/11/2005—note, small foggy patch is moisture on the camera lens (Image: Richard Francis).
FIGURE 9 in Cherax latimanus sp. nov., a new burrow-dwelling freshwater crayfish (Decapoda Parastacidae) from the mid-Murray River catchment, Australia
FIGURE 9. Open entrance to burrow of Cherax latimanus sp. nov., though blocked with a soil plug deeper down, Reedy Lake, Victoria (Image: Robert McCormack).
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
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OpenNeuro
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