Eoastropecten sechuanensis, Gale, 2020
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publication ID |
https://doi.org/ 10.11646/zootaxa.4861.1.10 |
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publication LSID |
lsid:zoobank.org:pub:DA9B3880-5E5C-4D27-A4F6-4A37860CBE18 |
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DOI |
https://doi.org/10.5281/zenodo.4414433 |
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persistent identifier |
https://treatment.plazi.org/id/03CC0A29-5A43-AA5E-6BB6-DD0DFBE219ED |
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treatment provided by |
Plazi |
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scientific name |
Eoastropecten sechuanensis |
| status |
sp. nov. |
Eoastropecten sechuanensis sp. nov.
Figure 2 View FIGURE 2 A–H
Diagnosis. As for genus.
Type material. The superomarginal figured ( Fig. 2A, E View FIGURE 2 ) is the holotype (Muschelkalkmuseum, Ingelfingen, Germany, MHI 2183/1), the other figured ossicles are paratypes (MHI 2183/2-6) .
Additional material. 25 marginal ossicles (MHI).
Type locality. Jiancougou , Sechuan Province, China .
Type stratum. Maantang Formation (sample C30 of Forel et al. 2019), Carnian (Upper Triassic) .
Etymology. Named after the Sechuan Province.
Description. External surfaces of marginals with well-defined, depressed rim of even width. Sculpture of raised central region consisting of fine, evenly sized rugosities, partly conjoined by narrow, radiating strips of stereom ( Fig. 2G View FIGURE 2 ). Rugosities non-aligned and evenly spaced on superomarginals, but arranged into irregular, oblique rows on the inferomarginals ( Fig. 2C View FIGURE 2 ). Interradial superomarginals short, median ossicles wedging slightly towards lateral border ( Fig. 2G View FIGURE 2 ); distal superomarginals broad, rectangular ( Fig. 2A, F, H View FIGURE 2 ). In proximal/distal view, external face evenly curved. Inferomarginals ( Fig. 2C, D View FIGURE 2 ) broad, short, with low profile, strongly convex at abactinolateral margin. Proximal actinal surface embayed for articulation of actinal ossicles. The rectangular abactinal outline of the marginals can be taken as evidence that the interradial arcs were evenly concave.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.