Hyalogyrina knorringfjelletensis, Nakrem, 2017
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publication ID |
https://doi.org/ 10.11646/zootaxa.4329.4.3 |
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publication LSID |
lsid:zoobank.org:pub:A0552Ffb-Fe2B-4Fad-809A-A1274Ac86Bcc |
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DOI |
https://doi.org/10.5281/zenodo.6009611 |
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persistent identifier |
https://treatment.plazi.org/id/B5525419-D02D-FFF9-FF7B-FA06FC4CF8DD |
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treatment provided by |
Plazi |
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scientific name |
Hyalogyrina knorringfjelletensis |
| status |
sp. nov. |
Hyalogyrina knorringfjelletensis View in CoL sp. nov.
( Fig. 9 View FIGURE 9 )
2015 Hyalogyrinidae ? gen. et sp. indet.; Hryniewicz et al. 2015a, table 1.
Diagnosis. Relatively large low-spired hyalogyrinid with delicate lirate ornamentation on the shell flank.
Holotype: PMO 217. 511a, H = 2.6 mm, W = 4.3 mm.
Paratype: PMO 217.510, W = 5.2 mm.
Type locality and age: Seep #12, Sassenfjorden , Svalbard; late Berriasian (Early Cretaceous).
Other material: Two specimens, both illustrated. One from seep #9 ( Fig. 9G View FIGURE 9 ; PMO 224.763) and one from seep #12 ( Fig. 9A, F View FIGURE 9 ; PMO 217.508); Sassenfjorden, Svalbard; late Berriasian (Early Cretaceous).
Description. Protoconch poorly preserved but apparently hyperstrophic ( Fig. 9G, H View FIGURE 9 ). Shell turbinateskeneiform, large for the genus. Teleoconch formed of up to four whorls, strongly and evenly convex and ornamented with delicate lirate ornamentation. Growth lines prosocline. Umbilicus and umbilical wall obscured by rock matrix in available specimens. Aperture sub-circular, complete.
Remarks. Hyalogyrina knorringfjelleti differs from other similar taxa, both fossil and modern, in having a relatively large size and delicately ornamented shell flanks, recollecting the ornament seen on the umbilical wall of modern hyalogyrinids ( Marshall 1988). Hyalogyrina knorringfjelletensis is strongly reminiscent of Alexogyra Bandel, 1996 (synonymized with Bandellina Schröder, 1995 by Kaim 2004) and modern species of Hyalogyrina Marshall, 1988 .
Distribution: Seeps #9 and #12, Sassenfjorden, Svalbard. Late Berriasian, Early Cretaceous. Etymology: After Knorringfjellet, a mountain above the type locality.
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.