Feracrinus heinzelleri Bohn
Feracrinus heinzelleri Bohn in Eléaume et al., 2012 Figures 4–8, Tables 5–8. Synonymy: Ptilocrinus antarcticus John, 1937: 3 –8, fig. 3; Gislén, 1939: 3–5, figs. 1–7; Feracrinus heinzelleri Bohn in Eléaume et al., 2012: 8–12, figs. 4–6; Eléaume et al., 2014: 210–211. Material examined. USNM E 48124,...
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| Format: | Other/Unknown Material |
| Language: | unknown |
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2015
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| Online Access: | https://zenodo.org/record/6095273 https://doi.org/10.5281/zenodo.6095273 |
| Summary: | Feracrinus heinzelleri Bohn in Eléaume et al., 2012 Figures 4–8, Tables 5–8. Synonymy: Ptilocrinus antarcticus John, 1937: 3 –8, fig. 3; Gislén, 1939: 3–5, figs. 1–7; Feracrinus heinzelleri Bohn in Eléaume et al., 2012: 8–12, figs. 4–6; Eléaume et al., 2014: 210–211. Material examined. USNM E 48124, Weddell Sea, Queen Maud Land, W of Cape Norwegia, 71 ° 40 ’S – 15 ° 35 ’W, depth 1,445 m (1 specimen with nearly complete stalk and broken calyx and arms); USNM 1005435, Ross Sea, Marie Byrd Land, E of Pennell Bank, 74 °06’ to 74 °06’S – 175 °05’ to 174 ° 58 ’W, depth 2,350 m (1 well-preserved crown with proximal stalk); USNM 1126892, Shetland Islands, 57 ° 50 ’ to 57 ° 54 ’S – 56 ° 51 ’ to 56 ° 51 ’W, depth 3,788–3,944 m (1 crown with proximal stalk, and isolated arms only from one larger specimen); USNM 1126896, center of Ross Sea, 75 ° 46 ’ to 75 ° 52 ’S – 168 ° 51 ’ to 168 ° 53 ’W, depth 2,049–2,089 m (2 specimens; one calyx with proximal arms, another with proximal arms and proximal half of stalk); USNM 1126873, Weddell Sea, 72 ° 49 ’ 36 ”S – 30 ° 29 ’ 42 ”W, depth 3,697 m (1 theca with proximal arms and proximal half of stalk). Emended diagnosis. A small to moderate size species with robust arms of proximal pattern 1 + 2 3 4 5 + 6 (92 % of arms), with first pinnule on Br 4 (6 % on Br 5); first free brachial beyond Br 4 varying from Br 7 to Br 15 and usually fewer than 4 successive muscular articulations. Pinnules relatively robust and rigid; ratio of pinnule to arm length about 0.4; insertion deep, carved on arm side and indenting the following brachial; synarthrial articulation on brachial with strong symmorphy; concave cover plates varying from lanceolate to rounded; genital pinnule inflated with one row of additional H-shaped plates. Ratio of distal radial to primibrachial width 1.2–1.8 (usually 1.3–1.5). Tegmen with orals large and erect around mouth; anal cone more or less conspicuous in C–D inter-ray and bearing large bulging plates; ratio of anal cone to oral cone height 0.7–1.3 (usually 0.8–1.1). ... |
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