Hyalogyrina Marshall, 1988

Nakrem, Hans Arne, 2017, Gastropods from the Late Jurassic - Early Cretaceous seep deposits in Spitsbergen, Svalbard, Zootaxa 4329 (4), pp. 351-374 : 364

publication ID

https://doi.org/ 10.11646/zootaxa.4329.4.3

publication LSID

lsid:zoobank.org:pub:A0552Ffb-Fe2B-4Fad-809A-A1274Ac86Bcc

DOI

https://doi.org/10.5281/zenodo.6009605

persistent identifier

https://treatment.plazi.org/id/B5525419-D02D-FFFA-FF7B-FC44FDA8FA53

treatment provided by

Plazi

scientific name

Hyalogyrina Marshall, 1988
status

 

Genus Hyalogyrina Marshall, 1988 View in CoL

Type species. Hyalogyrina glabra Marshall, 1988 ; original designation. New Zealand, Recent.

Remarks. Hyalogyrinidae unite small, largely smooth-shelled lower heterobranchs which differ from each other mostly in radular characters. Warén & Bouchet (1993) argue that Hyalogyrina Marshall, 1988 , and Hyalogyra Marshall, 1988 differ in the type of protoconch ― hyperstrophic and not hyperstrophic, respectively. Our shells seem to have a hyperstrophic protoconch and this is why we classify them in Hyalogyrina . There are a number of similar genera described from the fossil record: Bandellina Schröder, 1995 , Alexogyra Bandel, 1996, Carboninia Bandel, 1996 and Doggerostra Gründel, 1998 , which differ from each other only in minor details. This led Kaim (2004) to synonymize them all in the genus Bandellina Schröder, 1995 . It seems, however, that the majority of these forms might instead be classified in Hyalogyrina Marshall, 1988 as they form a continuum of morphologically similar forms with a hyperstrophic protoconch, with the name Hyalogyrina having priority. Bandel (1996) stated that his Triassic genus Alexogyra differs from the Recent genus Hyalogyra in being smaller and having more protoconch whorls.

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