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Pinna (Sulcatopinna) missouriensis

Bivalvia - Ostreida - Pinnidae

Taxonomy
Pinna missouriensis was named by Swallow (1863). It is a 3D body fossil.

It was recombined as Sulcatopinna missouriensis by Butts (1917), Weller (1920), Butts (1940), Busanus and Hoare (1991) and Hoare (1993); it was recombined as Pinna (Sulcatopinna) missouriensis by Hoare (2007).

Synonyms
Synonymy list
YearName and author
1863Pinna missouriensis Swallow p. 97
1894Pinna missouriensis Keyes p. 116
1897Pinna arkansana Weller p. 260 figs. Pl. 20 f. 1-2
1915Sulcatipinna arkansana Girty p. 87 figs. pl. 7 f. 1
1917Sulcatopinna missouriensis Butts figs. Pl. 28, fig. 14
1920Sulcatopinna missouriensis Weller p. 375 figs. Pl. 11 f. 1-2
1940Sulcatopinna missouriensis Butts p. 242 figs. Pl. 130 f. 37
1991Sulcatopinna missouriensis Busanus and Hoare p. 468 fig. 3.24–3.25
1993Sulcatopinna missouriensis Hoare p. 379 fig. 3.12
2007Pinna (Sulcatopinna) missouriensis Hoare p. 67 figs. 3.26 – 3.27

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
Schizocoela
phylumMollusca
classBivalvia
Eubivalvia
subclassAutobranchia(Groblen 1894)
infraclassPteriomorphia(Beurlen 1944)
RankNameAuthor
OstreomorphiFerussac 1822
OstreioniFerussac 1822
OstreataFerussac 1822
superorderOstreiformiiFerussac 1822
orderOstreida(Fërussac 1822)
suborderMalleidinaGray 1854
superfamilyPinnoideaLeach 1819
familyPinnidaeLeach 1819
genusPinnaLinnaeus 1758
subgenusSulcatopinna()
speciesmissouriensis()

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
J. W. Busanus and R. D. Hoare 1991Sulcatopinna with narrow, wedge-shaped shell; apical angle about 23˚; deep, rounded groove just dorsal to ridge paralleling hingeline; surface ornamented by up to 27 irregular and slightly sinuous, radial ribs crossed by comarginal growth lines.

Sulcatopinna inexpectens (Walcott, 1884) differs in having spine bases on the valves, S. maxvillensis (Whitfield, 1882b) has a greater number of radial ribs, and S. ludlovi (Whitfield, 1876) has a smaller apical angle and grooved radial ribs.
R. D. Hoare 1993Sulcatopinna with straight dorsal margin, groove paralleling margin on internal molds; valves ornamented with 16 slightly irregular, radiating ribs; anterior cross section subcircular, posterior cross section suboval; anterior angle approximately 17˚; growth lines in anterior portion meet dorsal margin at slightly more than 90? then curve posteriorly before swinging strongly anteriorly on ventral portion of valve.