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53 results for “Astropectinidae”
FIGURE 10 in Morphological comparison of Astropecten cingulatus and a new species of Astropecten (Paxillosida, Astropectinidae) from the Gulf of Mexico
FIGURE 10. Astropecten cingulatus: Spination of AD plates at mid-arm. Numbers indicate rows from the furrow on an adambulacral plate. Photo: A. Tablado, with permission.
FIGURE 3 in Morphological comparison of Astropecten cingulatus and a new species of Astropecten (Paxillosida, Astropectinidae) from the Gulf of Mexico
FIGURE 3. Astropecten karankawai from off the coast of Texas: Holotype (large specimen), R = 79 mm. Paratype (small specimen), R = 25 mm. Left, Abactinal view. Right, Actinal view.
FIGURE 2. Astropecten cingulatus from off Buenos Aires province, R in Morphological comparison of Astropecten cingulatus and a new species of Astropecten (Paxillosida, Astropectinidae) from the Gulf of Mexico
FIGURE 2. Astropecten cingulatus from off Buenos Aires province, R = 42 mm: Left. abactinal view. Right, actinal view. Modified from Bernasconi (1941, Plate VII).
FIGURE 9 in Morphological comparison of Astropecten cingulatus and a new species of Astropecten (Paxillosida, Astropectinidae) from the Gulf of Mexico
FIGURE 9. Astropecten cingulatus, Holotype. Spination of AD plates: A, Furrow from mid-arm (left) to the interradial area (right). Arrow: enlarged spine of the second row of the AD plates adjacent to ACT plates. B, Enlarged area of the box in panel A. 1–3: Numbers indicate each row on one AD plate.
FIGURE 6 in Morphological comparison of Astropecten cingulatus and a new species of Astropecten (Paxillosida, Astropectinidae) from the Gulf of Mexico
FIGURE 6. Astropecten cingulatus: Holotype (R = 28 mm). A, actinal surface of arm. B, abactinal surface of arm. Fr: fringe spines.
FIGURE 4 in Morphological comparison of Astropecten cingulatus and a new species of Astropecten (Paxillosida, Astropectinidae) from the Gulf of Mexico
FIGURE 4. Superomarginal plates and paxillae: A, B: Astropecten cingulatus. Holotype. A, disk paxillae. B, paxillae at midarm and granulated SM plates. C, D: Astropecten karankawai. C, disk paxillae. D, paxillae at mid-arm with pedicellariae (arrows) and granulated SM plates of a dried specimen.
FIGURE 10 in A new species of Astropecten (Echinodermata: Asteroidea: Paxillosida: Astropectinidae) and a comparison of the Astropecten species from the Gulf of Mexico and the East Florida Shelf
FIGURE 10. Linear regressions of the R:r and R:SM# ratios versus R for A. mcedwardi and A. antillensis.
FIGURE 17 in A new species of Astropecten (Echinodermata: Asteroidea: Paxillosida: Astropectinidae) and a comparison of the Astropecten species from the Gulf of Mexico and the East Florida Shelf
FIGURE 17. Astropecten spp. with thin, acicular paxillar and superomarginal spinelets (A, D), thin rod-shaped, rugose paxillar spinelets and superomaringal spinelets (B, E), and thick rod-shaped, rugose paxillar spinelets and superomarinal plates with granules (C, D). A, A. americanus TCWC 3-0937. B, A. alligator USNM E18467. C, A. cingulatus USNM 18345. D, A. americanus USNM 7701. E, A. alligator MCZ-AST-82, syntype. F, A. cingulatus NMHUK 180.5.7.304, holotype (from Lawrence et al. 2017, Fig. 3A). A–C: scale bars 1 mm. D–F: scale bars 1 cm.
FIGURE 13 in A new species of Astropecten (Echinodermata: Asteroidea: Paxillosida: Astropectinidae) and a comparison of the Astropecten species from the Gulf of Mexico and the East Florida Shelf
FIGURE 13. Shape of the adambulacral spines of Astropecten. Most species have more than one spine shape on a single plate but spines can often be categorized into one of three types (A–C). Spines are typically terete at the base and may be slightly or strongly compressed at the tip, unless otherwise noted. Hooked spines are blunt, curved, and mostly seen only in a few species. Spatulate spines may be compressed or have a depression at the tip, forming a spoon-like scoop. In rare cases spatulate tips can be deep enough to form a half-pipe.
FIGURE 16 in A new species of Astropecten (Echinodermata: Asteroidea: Paxillosida: Astropectinidae) and a comparison of the Astropecten species from the Gulf of Mexico and the East Florida Shelf
FIGURE 16. Astropecten spp. with (A, C) and without (B, D) dense paxillae and numerous superomarginal plates. A & C, A. articulatus USNM E12852, neotype. B & D, A. duplicatus NHMUK 43.2.10.152, syntype. A–B: scale bars 2 mm. C–D: scale bars 2 cm.
FIGURE 9 in A new species of Astropecten (Echinodermata: Asteroidea: Paxillosida: Astropectinidae) and a comparison of the Astropecten species from the Gulf of Mexico and the East Florida Shelf
FIGURE 9. Spination of superomarginal plates along the arms of Astropecten spp. A, A. antillensis ZMUC AST-4-23, syntype (R = 25 mm). B, A. mcedwardi FSBC I 117245, paratype (R = 21 mm). C, A. duplicatus FSBC I 70283 (R = 26 mm). Scale bar 0.5 cm.
FIGURE 8 in A new species of Astropecten (Echinodermata: Asteroidea: Paxillosida: Astropectinidae) and a comparison of the Astropecten species from the Gulf of Mexico and the East Florida Shelf
FIGURE 8. Adambulacral plates and spines (left: proximal, right: distal) of Astropecten spp. A, A. mcedwardi FSBC I 005769 (R = 17 mm). B, A. duplicatus FSBC I 70291 (R = 19 mm). C, A. articulatus FSBC I 125180 (R = 24) with arrows identifying spines offset behind the proximal and slightly enlarged distal spines of the second row. D, A. antillensis ZMUC AST-4-22, syntype (R = 29 mm). E, A. marginatus USNM E18385 (R = 19 mm). F, A. karankawai USNM E22502, paratype (R = 21 mm). Scale bar 0.5 cm.
FIGURE 6 in A new species of Astropecten (Echinodermata: Asteroidea: Paxillosida: Astropectinidae) and a comparison of the Astropecten species from the Gulf of Mexico and the East Florida Shelf
FIGURE 6. Inferomarginal plates with fringe spines (left: distal, right: proximal). A, A. mcedwardi FSBC I 005769 (R = 17 mm). B, A. duplicatus FSBC I 070291 (R = 19). C, A. articulatus FSBC I 125180 (R = 24). D, A. antillensis ZMUC AST-4-22, syntype (R = 29). E, A. marginatus USNM E18385 (R = 22mm). F, A. karankawai USNM E22502, paratype (R = 21mm). Scale bar 0.5 cm.
FIGURE 5 in A new species of Astropecten (Echinodermata: Asteroidea: Paxillosida: Astropectinidae) and a comparison of the Astropecten species from the Gulf of Mexico and the East Florida Shelf
FIGURE 5. Comparison of Astropecten spp. body shapes where R = 24.3–25.7 mm. A, A. mcedwardi FSBC I 117245, paratype (R:r 2.9, R:SM# 1.6). B, A. duplicatus FSBC I 70285 (R:r 3.4, R:SM# 1.6). C, A. articulatus FSBC I 125180 (R:r 3.5, R:SM# 1.0). D, A. antillensis ZMUC AST-4-23, syntype (R:r 4.4, R:SM# 1.2). E, A. marginatus USNM E18385 (R:r 3.5, R:SM# 0.9). F, A. karankawai FSBC I 134511 (R:r 3.8, R:SM# 1.5). Scale bar 1 cm.
FIGURE 3 in A new species of Astropecten (Echinodermata: Asteroidea: Paxillosida: Astropectinidae) and a comparison of the Astropecten species from the Gulf of Mexico and the East Florida Shelf
FIGURE 3. Maximum-likelihood tree resulting from the analysis of the 16S sequences for 26 exemplars of Astropecten. The final maximum likelihood optimization likelihood was −1913.827863. Bootstrap values are provided for nodes that subtend consequential branches. Bootstrap support values>60 indicated at nodes. The scale bar indicates the mean number of nucleotide substitutions per site for that length of branch.
FIGURE 15 in A new species of Astropecten (Echinodermata: Asteroidea: Paxillosida: Astropectinidae) and a comparison of the Astropecten species from the Gulf of Mexico and the East Florida Shelf
FIGURE 15. Astropecten spp. adambulacral plates bearing, in the second row, a distal spine that is wider and longer than adjacent spines (A, B), and plates with spines of equal length and width in the second row (C, D). A, A. articulatus USNM E12852, neotype. B, A. duplicatus FSBC I 070291. C, A. cingulatus USNM 18344 (as A. nitidus, holotype). D, A. alligator MCZ-AST- 82, syntype, with hook-shaped spines in the first and second rows.
FIGURE 2. Astropecten mcedwardi color variations. A, USNM 1551002 in A new species of Astropecten (Echinodermata: Asteroidea: Paxillosida: Astropectinidae) and a comparison of the Astropecten species from the Gulf of Mexico and the East Florida Shelf
FIGURE 2. Astropecten mcedwardi color variations. A, USNM 1551002, holotype (left, largest), USNM 1551004, paratype (upper right) and USNM 1551005, paratype (lower right). B, FSBC I 122364, paratype. C, FSBC I 131421, paratype. D, FSBC I 131433, paratype. E–G, FSBC I 131436, paratypes. Scale: 1 cm. Photographs: FWC Fisheries Independent Monitoring staff (A–B), Robert Lasley (C), and Janessa Cobb (D–G).
FIGURE 1. Astropecten mcedwardi n in A new species of Astropecten (Echinodermata: Asteroidea: Paxillosida: Astropectinidae) and a comparison of the Astropecten species from the Gulf of Mexico and the East Florida Shelf
FIGURE 1. Astropecten mcedwardi n. sp. A–B, USNM 1551002, holotype (below, largest), USNM 1551004, paratype (upper left) and USNM 1551005, paratype (upper right). A, Abactinal surface. B, Actinal surfaces. C–D, USNM 1551005. Rugose paxillar spinelets (C) and the abactinal surface (D) showing the madreporite (arrow) and large spine on interradial superomarginal plate, paxillar area at the base of an arm, and one interradial superomarginal spine. E–F, USNM 1551002. Actinal surface of the inferomarginal plates (E) and the adambulacral plates (F). Scale bars: A–B, 1 cm; C, 0.2 mm; D, 0.5 mm; E–F, 1 mm.
FIGURE 7 in A new species of Astropecten (Echinodermata: Asteroidea: Paxillosida: Astropectinidae) and a comparison of the Astropecten species from the Gulf of Mexico and the East Florida Shelf
FIGURE 7. Astropecten cingulatus modified from Sladen (1889, Plate 19c), illustrating the spination of the adambulacral plates (AD) and the inferomarginal (IM) plates with squamules (SQ), long spines (LS), and inferomarginal fringe spines (FS). Rows of adambulacral spines are labeled 1–3. Spines of row 1 are the furrow spines.
FIGURE 4 in A new species of Astropecten (Echinodermata: Asteroidea: Paxillosida: Astropectinidae) and a comparison of the Astropecten species from the Gulf of Mexico and the East Florida Shelf
FIGURE 4. Maximum-likelihood tree resulting from the analysis of the COI sequences for 16 exemplars of Astropecten. The final maximum likelihood optimization likelihood was −2817.230680. Bootstrap values are provided for nodes that subtend consequential branches. Bootstrap support values>60 indicated at nodes. The scale bar indicates the mean number of nucleotide substitutions per site for that length of branch.
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