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Goniasma

Gastropoda - Goniasmatidae

Synonymy list
YearName and author
1930Goniasma Tomlin
1944Murchisonia (Goniasma) Reed p. 335
1960Goniasma Knight et al. p. 293
1995Stegocoelia (Goniasma) Batten p. 22
2000Goniasma Nützel and Bandel
2002Goniasma Bandel p. 96
2002Goniasma Pan and Erwin p. 19
2002Goniasma Sepkoski, Jr.
2005Goniasma Bouchet et al. p. 82
2005Goniasma Nützel and Pan p. 1176
2015Goniasma Mazaev p. 936
2016Goniasma Nützel and Ketwetsuriya p. 504

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
Schizocoela
phylumMollusca
RankNameAuthor
classGastropodaCuvier 1797
subclassProsobranchiaMilne-Edwards 1848
superorderCaenogastropodaCox 1959
superfamilyOrthonematoideaNützel and Bandel 2000
familyGoniasmatidae()
subfamilyGoniasmatinae(Nützel and Bandel 2000)
genusGoniasmaTomlin 1930

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

Diagnosis
ReferenceDiagnosis
R. L. Batten 1995As discussed above, I believe the characters that separate the other subgenera of Stegocoelia apply equally to this subgenus. The generic features of a highspired, turreted shell with a pronounced midwhorl to low whorl periphery with a selenizone located near the periphery apply to this subgenus. The distinctive subgeneric feature which serves to separate S. Goniasma from S. Hypergonia, for example, is the placement of the selenizone just below the periphery.