Ophiologimus martynovi Thuy 2013, sp. nov.
Ophiologimus martynovi sp. nov. urn:lsid:zoobank.org:act: F05FA7AB-4BE9-43BE-B1D1-693D08CAE2D2 Fig. 11: 2-4 Diagnosis Species of Ophiologimus with large LAPs; well-developed vertical striation composed of overlapping lamellae at least in proximal LAPs; up to three large, ear-shaped spine articulatio...
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| Format: | Other/Unknown Material |
| Language: | unknown |
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2013
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| Online Access: | https://zenodo.org/record/3844169 https://doi.org/10.5281/zenodo.3844169 |
| Summary: | Ophiologimus martynovi sp. nov. urn:lsid:zoobank.org:act: F05FA7AB-4BE9-43BE-B1D1-693D08CAE2D2 Fig. 11: 2-4 Diagnosis Species of Ophiologimus with large LAPs; well-developed vertical striation composed of overlapping lamellae at least in proximal LAPs; up to three large, ear-shaped spine articulations; ventral lobe more slender than dorsal one and projecting ventro-distalwards beyond latter; inner side of LAP with moderately wide, straight, oblique ridge ventrally not merged with ventral portion of LAP; tentacle notch very deeply incised. Etymology Species named in honour of Alexander Martynov, who generously provided SEM pictures of lateral arm plates of Recent species of Ophiologimus for comparison. Type material Holotype GZG.INV.78532. Paratypes GZG.INV.78533 and GZG.INV.78534. Type locality and horizon Blake Nose, borehole ODP 171B 1049C 12x6, tropical northeast Atlantic; latest Aptian to earliest Albian, Hedbergella trochoidea to Microhedbergella rischi planktonic foraminifer zones, Early Cretaceous. Additional material GZG.INV.78535 (45 dissociated LAPs). Description of holotype Holotype GZG.INV.78532 is a dissociated, large proximal LAP; nearly as high as wide; dorso-proximal tip fragmentary; outline of dorsal edge not determinable; distal edge gently convex; proximal edge irregularly concave, devoid of spurs; ventral third of LAP strongly protruding ventro-proximalwards; ventro-distal tip of LAP strongly protruding ventralwards, tongue shaped; outer surface with well-developed, rather irregular, coarse vertical striation composed of overlapping lamellae with proximalward decrease in size and replaced by moderately coarsely to finely meshed stereom in proximal half of outer surface. Three large, equal-sized and equidistant, ear-shaped, nearly round spine articulations freestanding on non-elevated distal portion of LAP; dorsal and ventral lobes merged into continuous volute; ventral lobe more slender and smaller than dorsal one, ventro-distalwards projecting beyond dorsal lobe; gap between spine ... |
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