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Allodesma

Bivalvia - Modiomorphida - Allodesmatidae

Taxonomy
Allodesma was named by Ulrich (1894) [Sepkoski's age data: O Cara-m]. It is not extant.

It was assigned to Cycloconchidae by Ulrich (1894); to Allodesmatidae by Vokes (1980); and to Modiomorphoida by Sepkoski (2002).

Synonymy list
YearName and author
1894Allodesma Ulrich p. 617
1980Allodesma Vokes p. 71
2002Allodesma Sepkoski, Jr.

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
Schizocoela
phylumMollusca
classBivalvia
Eubivalvia
subclassAutobranchia(Groblen 1894)
RankNameAuthor
infraclassHeteroconchia(Cox 1960)
CardiomorphiFerussac 1822
CardioniFerussac 1822
CardiidiaFerussac 1822
CardiataFerussac 1822
superorderCardiiformiiFerussac 1822
orderModiomorphida(Newell 1969)
superfamilyCycloconchaceaUlrich 1884
familyAllodesmatidaeDall 1895
genusAllodesma

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
E. O. Ulrich 1894Shell small, transversely elongate-elliptical, moderately convex; beaks anterior, small, surface with concentric lines of growth. Hinge apparently with one or two long posterior lateral teeth in each valve, two cardinal teeth in the right valve, and only one in the left; anterior laterals short or wanting. Anterior adductor scar distinct, large, ovate, margined on the inner side by a strong curved ridge extending downward fi'om the hinge at a point immediately in front of the beaks. Just above the adductor impressions and in front of the ridge, a small pedal muscle scar. Posterior adductor impression faint, larger than the anterior, of rounded form, situated near the middle of the posterior cardinal slope. Pallial line simple.