Axinulus croulinensis Jeffreys 1847 ...
Axinulus aff. croulinensis Jeffreys, 1847 Fig. 4A Material. Two specimens, Off Ras Madrakah, southern Oman, Discovery cruise 211 st. 12719#1, 19°08´N 58°39´E, 3150 m, collected P.G. Oliver, 31 October 1994. NMW.Z. 1995.009.18. Description. To 2 mm in height. Very thin shelled. Equivalve. Equilateral...
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Zenodo
2015
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| Online Access: | https://dx.doi.org/10.5281/zenodo.6098586 https://zenodo.org/doi/10.5281/zenodo.6098586 |
| Summary: | Axinulus aff. croulinensis Jeffreys, 1847 Fig. 4A Material. Two specimens, Off Ras Madrakah, southern Oman, Discovery cruise 211 st. 12719#1, 19°08´N 58°39´E, 3150 m, collected P.G. Oliver, 31 October 1994. NMW.Z. 1995.009.18. Description. To 2 mm in height. Very thin shelled. Equivalve. Equilateral. Outline almost circular a little higher than long; anterior dorsal margin very short, horizontal; anterior curved, ventral slightly extended, posterior curved; posterior dorsal short sloping gently. Hinge plate smooth, edentulous. Remarks. In every respect these shells are identical with A. croulinensis from the Atlantic Ocean (Fig. 4 B). In the Atlantic A. croulinensis has been recorded throughout and from depths a little as 40 m to 3861 m (Payne & Allen 1991). Zelaya (2010) separated off the Antarctic populations as A. antarcticus Zelaya, 2010 but from shell characters there is little difference. The Atlantic abyssal A. brevis (Fig. 4 E) has a more tear-drop shaped shell with a distinct anterior slope ... : Published as part of Oliver, P. Graham, 2015, Deep-water Thyasiridae (Mollusca: Bivalvia) from the Oman Margin, Arabian Sea, new species and examples of endemism and cosmopolitanism, pp. 252-263 in Zootaxa 3995 (1) on page 259, DOI: 10.11646/zootaxa.3995.1.21, http://zenodo.org/record/236857 ... |
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