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123 results for “Crangonyctidae”
FIGURE 4 in A new species of the subterranean genus Stygobromus (Amphipoda: Crangonyctidae) from a cave spring in northern Florida, USA
FIGURE 4. Stygobromus floridanus, sp. n. Skippers Spring, Washington County, Florida. Paratype specimen (13 mm): (a) pereopod 3; (b) pereopod 4; (c) pereopod 5; (d) pereopod 6; (e) pereopod 7).
FIGURE 2 in A new species of the subterranean genus Stygobromus (Amphipoda: Crangonyctidae) from a cave spring in northern Florida, USA
FIGURE 2. Stygobromus floridanus, sp. n. Skippers Spring, Washington County, Florida. Paratype specimen (13 mm): (a, b) antenna 1, antenna 2; (c) right mandible; (d) left mandible in part (chewing structures enlarged); (e) lower lip); (f) maxilla 1; (g) maxilla 2; (h) maxilliped. All mouthparts except right mandible drawn to same scale. Antennae and right mandible drawn to smaller scale.
Figure 8 in Phylogenetic analyses of a new freshwater amphipod reveal polyphyly within the Holarctic family Crangonyctidae, with revision of the genus Synurella
Figure 8. Sicifera cahawba; holotype male, Old Cahawba Prairie, Dallas County, AL, USA (USNM 1660542), 6.38 mm. A, pleopod 1 (coupling spines and clothes-pin setae enlarged). B, pleopod 2 coupling spines. C, pleopod 3 coupling spines. D, epimera. E, uropod 1. F, uropod 2. G, uropod 3. H, telson. Scale bars: 1 mm.
Figure 3 in Phylogenetic analyses of a new freshwater amphipod reveal polyphyly within the Holarctic family Crangonyctidae, with revision of the genus Synurella
Figure 3. Habitus photographs of Sicifera cahawba. A, holotype, male (USNM 1660542), 6.38 mm, Old Cahawba Prairie, Dallas County, AL, USA. B, allotype, female (USNM 1660543), 8.27 mm, Old Cahawba Prairie, Dallas County, AL, USA. Scale bar: 1 mm.
Figure 6 in Phylogenetic analyses of a new freshwater amphipod reveal polyphyly within the Holarctic family Crangonyctidae, with revision of the genus Synurella
Figure 6. Sicifera cahawba; holotype male, Old Cahawba Prairie, Dallas County, AL (USNM 1660542), 6.38 mm. A, gnathopod 1 (palmar margin and dactylus enlarged). B, gnathopod 2 (palmar margin and dactylus enlarged). Scale bar: 1 mm.
Figure 2 in Phylogenetic analyses of a new freshwater amphipod reveal polyphyly within the Holarctic family Crangonyctidae, with revision of the genus Synurella
Figure 2. Recorded distribution of 'synurellids' in North America. Symbols with outlines denote type localities for the respective taxa.
Figure 1 in Phylogenetic analyses of a new freshwater amphipod reveal polyphyly within the Holarctic family Crangonyctidae, with revision of the genus Synurella
Figure 1. Maximum- likelihood phylogeny acquired from concatenated dataset (18S ribosomal DNA and COI) using IQTREE. Node support for each of the three support methodologies used is indicated by shaded circles placed on nodes; weakly supported nodes are not marked. Results of four species delimitation analyses (bPTP, GMYC, ASAP and ABGD) are presented to the right of the tree for members of the genus Sicifera. Vertical lines to the right of the tree illustrate both major clades within the family and biogeographical realms occupied by members of the Crangonyctidae. The line illustration depicts a male Sicifera cahawba. Abbreviations: ABGD, automatic barcode gap discovery; ASAP, assemble species by automatic partitioning; bPTP, Bayesian Poisson tree processes; GMYC, generalized mixed Yule coalescent; PP, posterior probability; SHaLRT, Shimodaria–Hasegawa approximate likelihood ratio test; UFBS, ultrafast bootstrap. New taxa and new combinations indicated.
Figure 5 in Phylogenetic analyses of a new freshwater amphipod reveal polyphyly within the Holarctic family Crangonyctidae, with revision of the genus Synurella
Figure 5. Sicifera cahawba; holotype male, Old Cahawba Prairie, Dallas County, AL, USA (USNM 1660542), 6.38 mm. A, upper lip. B, lower lip. C, maxilla 1 (outer plate spine teeth enlarged). D, maxilla 2. E, maxilliped (apical margin of inner plate enlarged). Scale bars: 0.5 mm.
Figure 4 in Phylogenetic analyses of a new freshwater amphipod reveal polyphyly within the Holarctic family Crangonyctidae, with revision of the genus Synurella
Figure 4. Sicifera cahawba; holotype male, Old Cahawba Prairie, Dallas County, Alabama (USNM 1660542), 6.38 mm. A, antenna 1 (single aesthetasc enlarged). B, antenna 2 (single calceolus enlarged). C, left mandible (lacinia mobilis enlarged). D, right mandible (palp omitted, lacinia mobilis enlarged). Scale bars: 1 mm in A, B; 0.5 mm in C, D.
Figure 7 in Phylogenetic analyses of a new freshwater amphipod reveal polyphyly within the Holarctic family Crangonyctidae, with revision of the genus Synurella
Figure 7. Sicifera cahawba; holotype male, Old Cahawba Prairie, Dallas County, AL, USA (USNM 1660542), 6.38 mm. A, pereopod 3. B, pereopod 4. C, pereopod 5. D, pereopod 6. E, pereopod 7. Scale bar: 1 mm.
Figure 10 in Phylogenetic analyses of a new freshwater amphipod reveal polyphyly within the Holarctic family Crangonyctidae, with revision of the genus Synurella
Figure 10. Sicifera cahawba; allotype female, Old Cahawba Prairie, Dallas County, AL, USA (USNM 1660543), 8.27 mm. A, uropod 1. B, uropod 2. C, uropod 3. D, telson. Scale bars: 1 mm.
Figure 9 in Phylogenetic analyses of a new freshwater amphipod reveal polyphyly within the Holarctic family Crangonyctidae, with revision of the genus Synurella
Figure 9. Sicifera cahawba; allotype female, Old Cahawba Prairie, Dallas County, AL, USA (USNM 1660543), 8.27 mm. The arrows in this figure associate the enlargement of the palmar margin/dactylus with the respective gnathopod. A, gnathopod 1 (palmar margin and dactylus enlarged). B, gnathopod 2 (palmar margin and dactylus enlarged). Scale bar: 1 mm.
Fig. 8 Crangonyx parhobbsi n in A new species rises from beneath Florida: molecular phylogenetic analyses reveal cryptic diversity among the metapopulation of Crangonyx hobbsi Shoemaker, 1941 (Amphipoda: Crangonyctidae)
Fig. 8 Crangonyx parhobbsi n. sp.; holotype female, Madison Blue Spring, Madison County, Florida (UFID 051869), 7.25 mm: A, pereopod 4. Crangonyx parhobbsi n. sp.; paratype female, Madison Blue Spring, Madison County, Florida (UFID 051869), 7.45 mm: B, pereopod 5; C, pereopod 6; D, pereopod 7. Scale bars represent 1 mm
Fig. 1 in A new species rises from beneath Florida: molecular phylogenetic analyses reveal cryptic diversity among the metapopulation of Crangonyx hobbsi Shoemaker, 1941 (Amphipoda: Crangonyctidae)
Fig. 1 Multilocus Bayesian phylogeny of selected members of the Crangonyctoidea. Posterior probability is indicated by colored diamonds (black 0.90–1.0, gray 0.89–0.80, white 0.79–0.70). Inset (upper) Crangonyx hobbsi, female, Devil's Eye Spring, Gilchrist County, Florida (YPM IZ 105321), 8.82 mm, scale bar represents
Fig. 6 Crangonyx parhobbsi n in A new species rises from beneath Florida: molecular phylogenetic analyses reveal cryptic diversity among the metapopulation of Crangonyx hobbsi Shoemaker, 1941 (Amphipoda: Crangonyctidae)
Fig. 6 Crangonyx parhobbsi n. sp.; holotype female, Madison Blue Spring, Madison County, Florida (UFID 051869), 7.25 mm: A, upper lip; B, lower lip; C, maxilla 1 (outer plate spine-teeth enlarged); D, maxilla 2 (outer plate apical serrate seta enlarged); E, maxilliped (inner plate apical margin enlarged). Scale bars represent 0.5 mm
Fig. 10 Crangonyx parhobbsi n in A new species rises from beneath Florida: molecular phylogenetic analyses reveal cryptic diversity among the metapopulation of Crangonyx hobbsi Shoemaker, 1941 (Amphipoda: Crangonyctidae)
Fig. 10 Crangonyx parhobbsi n. sp.; allotype male, Madison Blue Spring, Madison County, Florida (UFID 051870), 5.87 mm: A, antenna 1 accessory flagellum; B, antenna 2 (single calceolus enlarged); C, gnathopod 1 (palmar margin and dactylus enlarged); D, gnathopod 2 (palmar margin and dactylus enlarged). Scale bars 0.5 mm (A), 1 mm (B–D)
FIGURE 4. Crangonyx ephemerus n in Two new species of the genus Crangonyx Bate, 1859 (Amphipoda: Crangonyctidae) from the St. Marks River Basin with notes on the "Crangonyx floridanus complex "
FIGURE 4. Crangonyx ephemerus n. sp.; Holotype female, St. Marks Headwaters Greenway, Leon County, Florida (UFID 52586), 6.21 mm: A, upper lip; B, lower lip; C, maxilla 1 (outer plate spine-teeth enlarged); D, maxilla 2; E, maxilliped (inner plate apical margin enlarged). Scale bars represent 0.5 mm.
FIGURE 17 in Two new species of the genus Crangonyx Bate, 1859 (Amphipoda: Crangonyctidae) from the St. Marks River Basin with notes on the "Crangonyx floridanus complex "
FIGURE 17. Principal component analysis (PCA) scatterplot based on 16 morphometric variables collected from Crangonyx ephemerus n. sp., C. pseudoephemerus n. sp., and populations of C. floridanus. Axes PC 1 (uropod 1 peduncle outer robust setae number) and PC 2 (body length) explain 59.2% and 16.8% of variation, respectively.
FIGURE 13. Crangonyx pseudoephemerus n in Two new species of the genus Crangonyx Bate, 1859 (Amphipoda: Crangonyctidae) from the St. Marks River Basin with notes on the "Crangonyx floridanus complex "
FIGURE 13. Crangonyx pseudoephemerus n. sp.; Holotype female, St. Marks Headwaters Greenway, Leon County, Florida (UFID 52591), 6.24 mm: A, pereopod 4; B, pereopod 5; C, pereopod 6; D, pereopod 7; E, pleopod 1 (coupling hooks enlarged); F, pleopod 2 coupling hooks; G, pleopod 3 coupling hooks. Scale bars represent 1 mm.
FIGURE 2 in Two new species of the genus Crangonyx Bate, 1859 (Amphipoda: Crangonyctidae) from the St. Marks River Basin with notes on the "Crangonyx floridanus complex "
FIGURE 2. Habitus images of Crangonyx spp. examined. A, Crangonyx ephemerus n. sp.; Holotype female, St. Marks Headwaters Greenway, Leon County, Florida (UFID 52586), 6.21 mm; Crangonyx ephemerus n. sp.; B, Allotype male, St. Marks Headwaters Greenway, Leon County, Florida (UFID 52587), 3.85 mm; C, Crangonyx pseudoephemerus n. sp.; Holotype female, St. Marks Headwaters Greenway, Leon County, Florida (UFID 52591), 6.24 mm; D, Crangonyx pseudoephemerus n. sp.; Allotype male, St. Marks Headwaters Greenway, Leon County, Florida (UFID 52594), 4.16 mm. Scale bar represents 1 mm.
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