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Leptaena (Leptaena) strandi

Strophomenata - Strophomenida - Rafinesquinidae

Taxonomy
Leptaena strandi was named by Spjeldnaes (1957). Its type specimen is PMO 67019, a valve (east of a ventral interior), and it is a 3D body fossil.

It was recombined as Leptaena (Leptaena) strandi by Candela and Harper (2014).

Sister species lacking formal opinion data
L. dicax, L. ingrica

Synonymy list
YearName and author
1957Leptaena strandi Spjeldnaes pp. 176 - 177 figs. Pl. 10, figs. 4-5, textfigs, 38BDE, 39D
1962Leptaena strandi Williams pp. 199 - 200 figs. P1. XIX, figs. 16, 17
1984Leptaena strandi Harper and Owen p. 31 figs. pl. 4 f. 17
2014Leptaena (Leptaena) strandi Candela and Harper pp. Supplement 1

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
—Lophophorata
—PanbrachiopodaCarlson and Cohen 2020
phylumBrachiopodaCuvier 1805
RankNameAuthor
subphylumRhynchonelliformeaWilliams et al. 1996
classStrophomenataWilliams et al 1996
orderStrophomenidaOpik 1934
superfamilyStrophomenoideaKing 1846
familyRafinesquinidaeSchuchert 1893
subfamilyLeptaeninaeHall and Clarke 1894
genusLeptaenaDalman 1828
subgenusLeptaenaDalman 1828
speciesstrandi()

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.

†Leptaena (Leptaena) strandi Spjeldnaes 1957
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Diagnosis
ReferenceDiagnosis
N. Spjeldnaes 1957Leptaena species with abrupt geniculation with no elevated ridge around the disc. Angle between the fringe and disc about 90°, or slightly less. Ventral muscle impressions broad, short, radially striated and well defined.
A. Williams 1962Sharply geniculate, subrectangular Leptaena with a piano-convex disc up to 9 mm. long and ornamented by variably developed rugae; costeUae of equal thickness and coarse, about 4 per millimetre antero-medianly; ventral muscle-scar large and subcircular; dorsal median ridge fused to secondary shell deposit, anterior to socket plates, to form an anchor-shaped structure subtending the adductor muscle-scars.