Palaeoglossa, Cockerell, 1911
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publication ID |
https://doi.org/ 10.11646/zootaxa.3076.1.1 |
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persistent identifier |
https://treatment.plazi.org/id/A87D878B-FFE4-FFEF-0BA8-FA7AFD5CFBB6 |
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treatment provided by |
Felipe |
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scientific name |
Palaeoglossa |
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Palaeoglossa ? sp.
Pl. 2, Figs. 6–7
Material. Three ventral fragments and seven undetermined and poorly preserved specimens from samples F3477, F5273, JH-7 and JH-25. The figured specimen is TSGF 16789.
Description. Shell thin-walled, slightly convex, with acuminate egg-shaped outline. L/W ratio about 1.33. Largest measured specimen 2.8 mm long and 2.1 mm wide. Larval shell with pointed umbo. Micro-ornamentation absent but fine growth lines present. Ventral pseudointerarea low, orthocline and smooth. Pseudointerarea declining toward but separated from valve floor. Flexure lines well defined. Inner propareas broad, triangular, with gently convex to slightly concave posterolateral border. Pedicle groove narrow and shallow to moderately deep, not or weakly raised above valve floor. Muscle scars obscure. Pedicle nerve impressions more than 30% as long as valve. Valve floor not pitted.
Remarks. The lack of dorsal valves and the small number and poor preservation of specimens prohibits any meaningful comparison with the described species of Palaeoglossa .
Occurrence. 17, 50 and 57 m above base of Profilbekken Member, Valhallfonna Formation, Basissletta in northeastern Ny Friesland, Spitsbergen.
Plate 2
Ectenoglossa ? oviforma sp. nov.
Valhallfonna Formation.
1. F3840, paratype, impression of dorsal valve interior. Olenidsletta Member, 76 m above base. Coll. G. Vallance & R. Fortey, 1967, sample F3840 .
2. F3028/3678, holotype, impression of ventral valve interior and part of exterior. Olenidsletta Member, 85 m above base. Coll. G. Vallance & R. Fortey, 1967, sample F3028/F3678 .
3–4. TSGF16935 , paratype, juvenile ventral valve interior and oblique anterolateral view thereof. Profilbekken Member, 21 m above base. Coll. J. Hansen, 19.07.2008, sample JH-23 .
5. TSGF17005 , paratype, detail of pedicle groove and ridge. Olenidsletta Member, 97 m above base. Coll. J. Hansen, 28.07.2008, sample JH-136 .
Palaeoglossa ? sp.
Valhallfonna Formation, Profilbekken Member, 17 m above base.
6–7. TSGF16789 , ventral valve interior and detail of exterior. Coll. J. Hansen, 19.07.2008, sample JH-25 .
Pachyglossella ? sp.
Valhallfonna Formation, Profilbekken Member, 67 m above base. Coll. J. Hansen, 24.07.2008, sample JH-95.
8. TSGF16775, detail of postlarval ornamentation.
9–10. TSGF16777, valve exterior and detail of postlarval ornamentation.
11. TSGF16778, valve interior.
12. TSGF16776, ventral pseudointerarea.
Glossella ? sp.
Valhallfonna Formation.
13–14. TSGF16781 , valve exterior and detail of postlarval ornamentation. Olenidsletta Member, 90 m above base. Coll. J. Hansen, 20.07.2008, sample JH-45 .
15–16. TSGF16945 , valve exterior and detail of postlarval ornamentation. Profilbekken Member, 26 m above base. Coll. J. Hansen, 04.08.2008, sample JH-184 .
17–18. TSGF16780 , valve exterior and detail of postlarval ornamentation. Profilbekken Member, 67 m above base. Coll. J. Hansen, 24.07.2008, sample JH-95 .
19. TSGF16782 , valve exterior. Olenidsletta Member, 90 m above base. Coll. J. Hansen, 20.07.2008, sample JH-45 .
| R |
Departamento de Geologia, Universidad de Chile |
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.