Lawrenceoceras larus Kröger & Pohle 2021, sp. nov ...
Lawrenceoceras larus sp. nov urn:lsid:zoobank.org:act: B0503E12-D63A-4656-BAE7-8C22CFB40D5E Figs 5A–C, 6B, 7A Diagnosis Exogastrically curved conch with angle of expansion of conch width of ca 3° and slightly depressed conch cross section (rW = 1.16); conch surface smooth with fine irregularly space...
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Zenodo
2021
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| Online Access: | https://dx.doi.org/10.5281/zenodo.5795787 https://zenodo.org/doi/10.5281/zenodo.5795787 |
| Summary: | Lawrenceoceras larus sp. nov urn:lsid:zoobank.org:act: B0503E12-D63A-4656-BAE7-8C22CFB40D5E Figs 5A–C, 6B, 7A Diagnosis Exogastrically curved conch with angle of expansion of conch width of ca 3° and slightly depressed conch cross section (rW = 1.16); conch surface smooth with fine irregularly spaced growth lines which form shallow hyponomic sinus at convex side of conch curvature; siphuncle small, 0.1 of conch height and near conch margin. Etymology From the gull genus Larus Linnaeus, 1758, a common companion during fieldwork at Profilstranda. Type material Holotype Specimen FMNH-P30351. Paratypes Five specimens (FMNH-P30337, P30338, P30339, P30342, P30355) from bed PO 131, 128 m above base of Olenidsletta Member, V2 b trilobite zone, Blackhillsian, Floian. Type locality and horizon Profilstranda section, adjacent to Hinlopenstretet, Spitsbergen, bed Po123.3, 120.3 m, above base of Olenidsletta Member, V 2a trilobite zone, Blackhillsian, Floian. Description The holotype is a fragment of a curved phragmocone ... : Published as part of Kröger, Björn & Pohle, Alexander, 2021, Early-Middle Ordovician cephalopods from Ny Friesland, Spitsbergen - a pelagic fauna with Laurentian affinities, pp. 1-102 in European Journal of Taxonomy 783 (1) on pages 12-14, DOI: 10.5852/ejt.2021.783.1601, http://zenodo.org/record/5793422 ... |
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