Hudlestoniella hammeri Nakrem 2017, sp. nov. ...
Hudlestoniella hammeri sp. nov. (Fig. 5A–G) 2015 Hudlestoniella sp.; Hryniewicz et al. 2015a, table 1. Diagnosis. Teleoconch high spired. Three earliest teleoconch whorl ornamented with strong opisthocline axial ribs and fine spiral lirae. Ornamentation fading away later in ontogeny. Holotype: PMO 2...
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Zenodo
2017
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| Online Access: | https://dx.doi.org/10.5281/zenodo.6009583 https://zenodo.org/doi/10.5281/zenodo.6009583 |
| Summary: | Hudlestoniella hammeri sp. nov. (Fig. 5A–G) 2015 Hudlestoniella sp.; Hryniewicz et al. 2015a, table 1. Diagnosis. Teleoconch high spired. Three earliest teleoconch whorl ornamented with strong opisthocline axial ribs and fine spiral lirae. Ornamentation fading away later in ontogeny. Holotype: PMO 224.754, H = 3.6 mm. Type locality and age: Seep # 9 in Sassenfjorden area, Svalbard; late Berriasian, Early Cretaceous. Paratype: PMO 224.755, H = 8.8 mm, W = 7.0 mm. Additional material: Seventeen specimens; one from seep #5 (late Berriasian), five specimens from seep #8 (late Tithonian), four specimens (two illustrated PMO 224.756 and PMO 224.757) from seep #9 (late Berriasian), and seven specimens from seep #12 (late Berriasian), Sassenfjorden, Svalbard. Description. Protoconch low spired, seemingly smooth. Demarcation between protoconch and teleoconch not observed. Early teleoconch ornamented with strong, strongly opisthocyrt axial ribs and fine spiral lirae. After the third teleoconch whorl axial ribs absent ... : Published as part of Nakrem, Hans Arne, 2017, Gastropods from the Late Jurassic - Early Cretaceous seep deposits in Spitsbergen, Svalbard, pp. 351-374 in Zootaxa 4329 (4) on pages 360-361, DOI: 10.11646/zootaxa.4329.4.3, http://zenodo.org/record/1003014 ... |
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