PBDB Taxon

Basic info	Taxonomic history	Classification	Included Taxa
Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

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).

Sister species lacking formal opinion data

P. africana, P. anderssoni, P. cottai, P. cretacia, P. cuneata, P. ecki, P. fragilis, P. hombresi, P. kauffmani, P. kingi, P. laquata, P. mediokeuperina, P. nobilis, P. refurca, P. socialis, P. varicosa, P. vaughani, P. sandsfootensis, P. kasimirensis

Synonyms

Pinna arkansana was named by Weller (1897). It is a 3D body fossil.

It was recombined as Sulcatipinna arkansana by Girty (1915); it was synonymized subjectively with Sulcatopinna missouriensis by Busanus and Hoare (1991).

Synonymy list

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

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Protostomia
—	Spiralia
superphylum	Lophotrochozoa
phylum	Mollusca
class	Bivalvia
—	Eubivalvia
subclass	Autobranchia	(Groblen 1894)
infraclass	Pteriomorphia	(Beurlen 1944)

Rank	Name	Author
—	Ostreomorphi	Ferussac 1822
—	Ostreioni	Ferussac 1822
—	Ostreata	Ferussac 1822
superorder	Ostreiformii	Ferussac 1822
order	Ostreida	(Fërussac 1822)
suborder	Malleidina	Gray 1854
superfamily	Pinnoidea	Leach 1819
family	Pinnidae	Leach 1819
genus	Pinna	Linnaeus 1758
subgenus	Sulcatopinna	()
species	missouriensis	()

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.

†Pinna (Sulcatopinna) missouriensis Swallow 1863

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Invalid names: Sulcatopinna arkansana Weller 1897 [synonym]

Diagnosis

Reference	Diagnosis
J. W. Busanus and R. D. Hoare 1991	Sulcatopinna 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 1993	Sulcatopinna 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.