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Leptaena (Leptaena) infrunita

Strophomenata - Strophomenida - Rafinesquinidae

Taxonomy
Leptaena infrunita was named by Williams (1962). Its type specimen is BB.26084, a valve (Internal and external mould of brachial valve), and it is a 3D body fossil.

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

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

Synonymy list
YearName and author
1962Leptaena infrunita Williams pp. 198 - 199 figs. Pl. XIX, figs. 11-15
2014Leptaena (Leptaena) infrunita 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
speciesinfrunita()

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.

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Diagnosis
ReferenceDiagnosis
A. Williams 1962Diagnosis.--Leptaena with a concavo-convex, subquadrate disc, on an average almost 9 mm. long and just under two-thirds as long as wide, defined by a sharply geniculate zone the antero-median portion of which is broadly sulcate dorsally; radial ornamentation consisting of unequally thickened and cancellated costellae, commonly spaced at 6 per millimetre antero-medianly, 10-12 strong and continuously concentric rugae corrugate the disc; teeth strong with short, obscure dental lamellae, ventral muscle-scar longer than wide and oval, contained by a low boundary of secondary shell deposit except anteriorly; cardinal process lobes parallel-sided, divergent, sockets small with their plates embedded in a prominent bar of secondary shell substance which is continuous with a short median ridge to form an anchor-shaped structure embracing a pair of muscle impressions antero-laterally.