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107 results for “Astacidea”
Figure 12 in Postembryonic development in freshwater crayfish (Decapoda: Astacidea) in an evolutionary context
Figure 12. Juvenile Stage III of Procambarus virginalis. (A) Antenna 1, dorsal view; (B) antennal scale, dorsal view; (C) flagellum of antenna 2, dorsal view; (D) mandible, view of inside of mouth; (E) maxilla 1, oral view; (F) maxilla 2, oral view; (G) first maxilliped, oral view; (H) second maxilliped, oral view; (I) third maxilliped, oral view; (J) pleopod. Scale bars: 0.25 mm.
Figure 15. Juvenile Stage II in Postembryonic development in freshwater crayfish (Decapoda: Astacidea) in an evolutionary context
Figure 15. Juvenile Stage II of Cambaroides japonicus. (A) Habitus, lateral view; (B) eses and rostrum, dorsal view; (C) tail fan, dorsal view; (D) posterior edge of tail fan; (E–I) pereiopods 1–5, dorsal or lateral view; (J–N) distal segments of pereiopods 1–5, dorsal or lateral view. Scale bars: 0.25 mm.
Figure 11 in Postembryonic development in freshwater crayfish (Decapoda: Astacidea) in an evolutionary context
Figure 11. Juvenile Stage III of Procambarus virginalis. (A) Habitus, lateral view; (B) eses and rostrum, dorsal view; (C) tail fan, dorsal view; (D–H) pereiopods 1–5, dorsal or lateral view; (I–M) distal segments of pereiopods 1–5, dorsal or lateral view. Scale bars: 0.25 mm.
Figure 18 in Postembryonic development in freshwater crayfish (Decapoda: Astacidea) in an evolutionary context
Figure 18. Juvenile Stage III of Cambaroides japonicus. (A) Antenna 1, dorsal view; (B) antennal scale, dorsal view; (C) antenna 2, dorsal view; (D) mandible, view of inside of mouth; (E) maxilla 1, oral view; (F) maxilla 2, oral view; (G) first maxilliped, oral view; (H) second maxilliped, oral view; (I) third maxilliped, oral view; (J) pleopod. Scale bars: 0.25 mm.
Figure 10. Juvenile Stage II in Postembryonic development in freshwater crayfish (Decapoda: Astacidea) in an evolutionary context
Figure 10. Juvenile Stage II of Procambarus virginalis. (A) Antenna 1, dorsal view; (B) antennal scale, dorsal view; (C) flagellum of antenna 2, dorsal view; (D) mandible, view of inside of mouth; (E) maxilla 1, oral view; (F) maxilla 2, oral view; (G) first maxilliped, oral view; (H) second maxilliped, oral view; (I) third maxilliped, oral view; (J) pleopod. Scale bar: 0.25 mm.
Figure 9. Juvenile Stage II in Postembryonic development in freshwater crayfish (Decapoda: Astacidea) in an evolutionary context
Figure 9. Juvenile Stage II of Procambarus virginalis. (A) Habitus, lateral view; (B) eses and rostrum, dorsal view; (C) tail fan, dorsal view; (D–H) pereiopods 1–5, dorsal or lateral view; (I–M) distal segments of pereiopods 1–5, dorsal or lateral view. Scale bars: 0.25 mm.
Figure 16. Juvenile Stage II in Postembryonic development in freshwater crayfish (Decapoda: Astacidea) in an evolutionary context
Figure 16. Juvenile Stage II of Cambaroides japonicus. (A) Antenna 1, dorsal view; (B) antennal scale, dorsal view; (C) antenna 2, dorsal view; (D) mandible, view of inside of mouth; (E) maxilla 1, oral view; (F) maxilla 2, oral view; (G) first maxilliped, oral view; (H) second maxilliped, oral view; (I) third maxilliped, oral view; (J) pleopod. Scale bars: 0.25 mm.
Figure 13. Juvenile Stage I in Postembryonic development in freshwater crayfish (Decapoda: Astacidea) in an evolutionary context
Figure 13. Juvenile Stage I of Cambaroides japonicus. (A) Habitus, lateral view; (B) eses and rostrum, dorsal view; (C) tail fan and telson thread, dorsal view; (D) posterior edge of the telson and telson thread; (E–I), pereiopods 1–5, dorsal or lateral view; (J–N) distal segments of pereiopods 1–5, dorsal or lateral view. Scale bars: 0.25 mm.
Figure 17 in Postembryonic development in freshwater crayfish (Decapoda: Astacidea) in an evolutionary context
Figure 17. Juvenile Stage III of Cambaroides japonicus. (A) Habitus, lateral view; (B) eses and rostrum, dorsal view; (C) tail fan, dorsal view; (D) posterior edge of tail fan; (E–I) pereiopods 1–5, dorsal or lateral view; (J–N) distal segments of pereiopods 1–5, dorsal or lateral view. Scale bars: 0.5 mm in A–C, 0.25 mm in D–M.
Figure 7. Juvenile Stage I in Postembryonic development in freshwater crayfish (Decapoda: Astacidea) in an evolutionary context
Figure 7. Juvenile Stage I of Procambarus virginalis. (A) Habitus, lateral view; (B) eses and rostrum, dorsal view; (C) tail fan and telson thread, dorsal view; (D) posterior edge of the tail fan and telson thread; (E–I), pereiopods 1–5, dorsal or lateral view; (J–N) distal segments of pereiopods 1–5, dorsal or lateral view. Scale bars: 0.25 mm.
Freshwater crayfishes (Decapoda: Astacidea) of the Montana Entomology Collection, Montana State University
<p>Astacidea (colloquially known as crayfish, crawfish, crawdads, or mudbugs) are well-recognized crustaceans, with distributions especially of interest to fisheries and aquatic ecologists. From 2018 to 2022, Montana Entomology Collection (MTEC), funded by the Council on Library and Information Resources “Hidden Collections” grant, digitized Astacidea (Crustacea: Decapoda) specimens housed in its museum. This produced over 160 metadata records detailing sampling localities, collecting dates, number of individuals, and identifications of specimens collected mainly from Montana, USA. The metadata records reveal the efforts of 28 collectors, spanning 60 years of sampling. This dataset makes information associated with 726 individual specimens from 5 species stored in the MTEC available.</p>
FIGURE 9 in Taxonomic revision of the extinct clawed lobster genus Oncopareia Bosquet, 1854 (Decapoda, Astacidea, Nephropidae)
FIGURE 9. Oncopareia lunata (Fritsch, in Fritsch and Kafka, 1887); incomplete cephalothorax with pleon from the lower–middle Turonian (Bílá Hora Formation) in Prague, Czech Republic (NM O3473). A, Digital copy of the figure from Fritsch and Kafka (1887, pl. 5, fig. 6). B, Holotype in dorsal view with morphological features highlighted by pencil (presumably by Fritsch himself). C, Holotype in dorsal view with pencil marks removed. D, Holotype in lateral view.
FIGURE 7 in Taxonomic revision of the extinct clawed lobster genus Oncopareia Bosquet, 1854 (Decapoda, Astacidea, Nephropidae)
FIGURE 7. Nymphaeops coesfeldiensis Schlüter, 1862 (= Oncopareia bredai Bosquet, 1854, as here understood). A, Incomplete cephalothorax with associated pleon in lateral view (from Schlüter, 1862, pl. 13, fig. 3). B, Cephalothorax and pleon in dorsal view (from Schlüter, 1862, pl. 13, fig. 6). C, Reconstruction of cephalothorax in dorsal view (from Schlüter, 1879, pl. 15, fig. 2). D, Near-complete individual in lateral view (from Schlüter, 1879, pl. 15, fig. 1). E, Cephalothorax and pleon in lateral view (from Mertin, 1941, text-fig. 9a). F, Pectinate claw (from Mertin, 1941, text-fig. 10k). G, Crusher claw (from Mertin, 1941, text-fig. 10b). H, Crusher claw (from Mertin, 1941, text-fig. 10d). Nymphaeops coesfeldiensis Schlüter, 1862 (= Oncopareia bredai Bosquet, 1854, as here understood) from the Vaals Formation (lower Campanian) at the former CPL SA quarry, Haccourt, north-east Belgium (I–K). I, Near-complete cephalothorax with associated appendages in lateral view (NHMM JJ 9974). J, Crusher claw (NHMM HB 393). K, Fingers of pectinate claw (NHMM HB 756). Figure parts A–H not to scale.
FIGURE 10 in Taxonomic revision of the extinct clawed lobster genus Oncopareia Bosquet, 1854 (Decapoda, Astacidea, Nephropidae)
FIGURE 10. Hoploparia beyrichi Schlüter, 1862; upper Maastrichtian (Kunrade Formation), Kunrade area, southern Limburg, the Netherlands. A, Pleon in lateral view (from Bosquet, 1854, pl. 10, fig. 6). B, Right claw in inner and outer lateral views (from Bosquet, 1854, pl. 10, fig. 71). C, Incomplete right claw (from Bosquet, 1854, pl. 10, fig. 7). D, E, Pleon in dorsal (D) and lateral (E) views (IRScNB 90-32f). F–H, Fragmentary claw (right propodus) in inner lateral (F), outer lateral (G) and dorsal (H) views (IRScNB 90-19j). I, Cephalothorax with associated incomplete pleon in lateral view (IRScNB 90-32d). J, Right claw (propodus and carpus) in inner lateral view (IRScNB 90-24b). K, Cephalothorax with associated pleon (holotype, MB. A. 209). L–M, Cephalothorax in lateral (L) and dorsal (M) views (IRScNB 90- 33g). Specimens were whitened with ammonium chloride prior to photography.
FIGURE 6. Oncopareia bredai Bosquet, 1854 in Taxonomic revision of the extinct clawed lobster genus Oncopareia Bosquet, 1854 (Decapoda, Astacidea, Nephropidae)
FIGURE 6. Oncopareia bredai Bosquet, 1854; isolated cephalothoraxes from the upper Turonian (uppermost part of the Jizera Formation) at Vinary near Vysoké Mýto, Czech Republic. A, Isolated cephalothorax in lateral view (NM O3470). B, Digital copy of Fritsch and Kafka (1887, pl. 5, fig. 2). C, Isolated cephalothorax in lateral view (NM O6861). Both specimens were whitened with ammonium chloride prior to photography.
FIGURE 4. Oncopareia bredai Bosquet, 1854 in Taxonomic revision of the extinct clawed lobster genus Oncopareia Bosquet, 1854 (Decapoda, Astacidea, Nephropidae)
FIGURE 4. Oncopareia bredai Bosquet, 1854; cephalothorax with associated pleonal segments 1 and 2 and both claws (MNHN R03408) from the upper Maastrichtian (Kunrade Formation) at Kunrade, the Netherlands. A, Cephalothorax in left lateral view. B, Cephalothorax in dorsal view. C, Cephalothorax in right lateral view. D, Both claws. E, Crusher claw in lateral view.
FIGURE 3. Oncopareia bredai Bosquet, 1854 in Taxonomic revision of the extinct clawed lobster genus Oncopareia Bosquet, 1854 (Decapoda, Astacidea, Nephropidae)
FIGURE 3. Oncopareia bredai Bosquet, 1854; upper Maastrichtian (Kunrade Formation) of the Kunrade area, southern Limburg, the Netherlands. A, Cephalothorax in lateral view (from Bosquet, 1854, pl. 10, fig. 5). B, Anterior portion of cephalothorax in lateral view (from Bosquet, 1854, pl. 10, fig. 8). C, Cephalothorax with pleon and tailfan in lateral view (from Bosquet, 1854, pl. 10, fig. 61). D, Cephalothorax in lateral view (IRScNB 90-32c). E, Cephalothorax in lateral view (IRScNB 90-17). F, Anterior portion of cephalothorax in lateral view (IRScNB 90-15b). G, Incomplete individual in lateral view (IRScNB 90-33f, designated lectotype herein). H, I, Pleon in lateral (H) and dorsal (I) views (IRScNB 90-35c). J, Pleonal segments 1–3 in lateral view (IRScNB 90-23b). K, Right (crusher) and left (pectinate) claws of the same individual (IRScNB 90-28). L, Fingers of pectinate claw in lateral view (IRScNB 90-3b). M, Crusher claw in lateral view (IRScNB 90-32a). N, Pectinate claw in lateral view (IRScNB 90-27b). Specimens in D–F and H–N were whitened with ammonium chloride prior to photography.
FIGURE 2 in Taxonomic revision of the extinct clawed lobster genus Oncopareia Bosquet, 1854 (Decapoda, Astacidea, Nephropidae)
FIGURE 2. Oncopareia bredai (sensu Bosquet, 1854), as a composite species. A, Cephalothorax of O. bredai (from Bosquet, 1854, pl. 10, fig. 5). B, Pleon of Hoploparia beyrichi Schlüter, 1862 (from Bosquet, 1854, pl. 10, fig. 6). C, Claw of H. beyrichi (from Bosquet, 1854, pl. 10, fig. 71b). D, Composite drawing from Mertin (1941, text-fig. 9e). E, Pleonal segments 1 and 2 of O. bredai (as Homarus bosqueti Pelseneer, 1886; from Pelseneer, 1886, fig. 4).
FIGURE 8 in Taxonomic revision of the extinct clawed lobster genus Oncopareia Bosquet, 1854 (Decapoda, Astacidea, Nephropidae)
FIGURE 8. Species of Oncopareia based on fragmentary specimens. A–E. Oncopareia esocina (Fritsch, in Fritsch and Kafka, 1887); pectinate claw with associated pleon and tailfan from the lower Coniacian (Teplice Formation) at Oškobrh near Poděbrady, Czech Republic. A, Digital copy of figure from Fritsch and Kafka (1887, text-fig. 59). B, Digital copy of figure from Fritsch and Kafka (1887, pl. 4, fig. 7). C, Part of the holotype (NM O3467). D, Counterpart of the holotype (NM O3468). E, Detailed view of pectinate claw. F, G, Oncopareia klintebjergensis Jakobsen and Collins, 1979; Paleocene (Lellinge Greensand Limestone) of Klintebjerg, Denmark. F, Incomplete cephalothorax in lateral view (holotype). G, Fingers of pectinate claw (paratype).
FIGURE 1 in Taxonomic revision of the extinct clawed lobster genus Oncopareia Bosquet, 1854 (Decapoda, Astacidea, Nephropidae)
FIGURE 1. Morphology of cephalothorax and a general habitus of studied taxa. A, Cephalothorax of nephropid lobsters with selected morphological characters (modified from Tshudy and Sorhannus, 2003). B, Habitus of thaumastocheliform lobsters, exemplified by Thaumastocheles zaleucus (from Calman, 1911). C, Habitus of ctenochelid ghost shrimps, exemplified by Ctenocheles balssi (from Kishinouye, 1926). D, Groove pattern of Oncopareia bredai Bosquet, 1854 (redrawn from Tshudy and Sorhannus, 2000b, fig. 2.2). E, Groove pattern of Hoploparia beyrichi Schlüter, 1862 (redrawn from Tshudy and Sorhannus, 2000b, fig. 2.3).
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