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Exilitheca

Orthothecida - Allathecidae

Taxonomy
Exilitheca is a genus. It is not extant.

It was assigned to Exilithecida by Sepkoski (2002); and to Allathecidae by Parkhaev and Demidenko (2010).

Species lacking formal opinion data

View classification of included taxa

Synonyms
Synonymy list
YearName and author
2002Egdetheca Sepkoski, Jr.
2002Exilitheca Sepkoski, Jr.
2010Exilitheca Parkhaev and Demidenko p. 939

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Eutriploblastica
Neotriploblastica
Eucoelomata
superphylumLophotrochozoa
RankNameAuthor
Lophophorata
phylumHyolitha
orderOrthothecida
familyAllathecidae
genusExilitheca

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
P. Y. Parkhaev and Y. Demidenko 2010"Shell conical, long, and curved. Expansion angle changes from 8° in apical part to 22° in middle part, then towards aperture decreases to 9° (Sysoev, 1972). Cross-section rounded-triangular, sometimes rounded-trapeziform. Apical part of shell pointed. Aperture straight or almost straight. Shell smooth or with slightly developed longitudinal and transverse ribs."