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Hemithecella

Polyplacophora - Mattheviidae

Taxonomy
Hemithecella was named by Butts (1941) [Ulrich & Bridge in Butts 1941; Sepkoski's age data: Cm Trep-l O Trem-l Sepkoski's reference number: 274]. It is the type genus of Hemithecellidae.

It was assigned to Hemithecellidae by Stinchcomb and Darrough (1995); to Paleoloricata by Sepkoski (2002); and to Mattheviidae by Runnegar et al. (1979) and Pojeta et al. (2010).

Synonyms
Synonymy list
YearName and author
1941Hemithecella Butts
1979Hemithecella Runnegar et al. p. 1389
1995Elongata Stinchcomb and Darrough
1995Hemithecella Stinchcomb and Darrough p. 58
1995Elongata Stinchcomb and Darrough p. 62
2002Elongata Sepkoski, Jr.
2002Hemithecella Sepkoski, Jr.
2010Hemithecella Pojeta et al. p. 8

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
Schizocoela
RankNameAuthor
phylumMollusca
Serialia
classPolyplacophorade Blainville 1816
subclassPaleoloricata()
familyMattheviidae
genusHemithecella

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
B. Runnegar et al. 1979Relatively large chiton with body valves like those of Chelodes except that each may have a sizeable hole (muscle insertion?) beneath the posterior edge of the plate (Pl. 1, fig. 32); head and tail valves unknown.