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Thierachella

Gastropoda - Rissoidae

Taxonomy
Thierachella was named by Fischer (1969) [Sepkoski's age data: J Bath Sepkoski's reference number: 650].

It was assigned to Rissoidae by Ponder (1984); and to Neotaenioglossa by Sepkoski (2002).

Synonymy list
YearName and author
1969Thierachella Fischer
1984Thierachella Ponder p. 99
2002Thierachella Sepkoski, Jr.

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
Schizocoela
phylumMollusca
RankNameAuthor
classGastropodaCuvier 1797
superorderHypsogastropoda(Ponder and Lindberg 1997)
infraorderLittorinimorphaGolikov and Starobogtov 1975
Discopoda(Fischer 1884)
superfamilyRissooideaGray 1847
familyRissoidaeGray 1847
genusThierachellaFischer 1969

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
W. F. Ponder 1984Species in this group have tall-spired, smooth shells with a prosocline outer lip. Fischer also includes T. microstoma (Piette, 1855 nom. nud.) Fischer, 1969. There is little in the shell characters of Thierachella indicative of its relationships although they may be with the Rissoidae or, possibly, Barleeidae.