|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Gastropoda - Goniasmatidae
It was reranked as Murchisonia (Goniasma) by Reed (1944); it was reranked as Stegocoelia (Goniasma) by Batten (1995).
It was assigned to Murchisonia by Reed (1944); to Stegocoelia by Batten (1995); to Goniasmidae by Nützel and Bandel (2000); to Orthonemidae by Bandel (2002); to Murchisoniidae by Knight et al. (1960) and Pan and Erwin (2002); to Archaeogastropoda by Sepkoski (2002); to Goniasmatidae by Bouchet et al. (2005) and Mazaev (2015); and to Goniasmatinae by Nützel and Pan (2005) and Nützel and Ketwetsuriya (2016).
|Year||Name and author|
|1944||Murchisonia (Goniasma) Reed p. 335|
|1960||Goniasma Knight et al. p. 293|
|1995||Stegocoelia (Goniasma) Batten p. 22|
|2000||Goniasma Nützel and Bandel|
|2002||Goniasma Bandel p. 96|
|2002||Goniasma Pan and Erwin p. 19|
|2002||Goniasma Sepkoski, Jr.|
|2005||Goniasma Bouchet et al. p. 82|
|2005||Goniasma Nützel and Pan p. 1176|
|2015||Goniasma Mazaev p. 936|
|2016||Goniasma Nützel and Ketwetsuriya p. 504|
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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.
|R. L. Batten 1995||As 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.|