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Leptaena orhor

Strophomenata - Strophomenida - Rafinesquinidae

Taxonomy
Orhoria orhor was named by Havlicek and Storch (1990). Its type specimen is VH 4406b, a valve (Pedicle valve), and it is a 3D body fossil.

It was recombined as Leptaena orhor by Havlicek and Storch (1999).

Sister species lacking formal opinion data

View classification of included taxa

Synonymy list
YearName and author
1990Orhoria orhor Havlicek and Storch pp. 74 - 75 figs. Pl. XVI, fig. 18
1999Leptaena orhor Havlicek and Storch

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Eutriploblastica
Neotriploblastica
Eucoelomata
superphylumLophotrochozoa
Lophophorata
phylumBrachiopodaCuvier 1805
RankNameAuthor
subphylumRhynchonelliformeaWilliams et al. 1996
classStrophomenataWilliams et al 1996
orderStrophomenidaOpik 1934
superfamilyStrophomenoideaKing 1846
familyRafinesquinidaeSchuchert 1893
subfamilyLeptaeninaeHall and Clarke 1894
genusLeptaenaDalman 1828
speciesorhor()

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
V. Havlicek and P. Storch 1990Shell small for the genus, 7.5--:-10.0 Il1m wide, anteriorly geniculate. Disc ofpedicle valve gently convex umbonally but flat to slightly concave near anterior margin; peripheral rim clearly developed only at antero-lateral sides of the. disc but indistinct in the median sector where it 'is substituted by a prominent edge at the disc/trail boundary. Disc rectrangular in outline, 52-60% as long as wide, with nearly parallel sides. Hinge line extends into short ears. Pseudodeltidium and pedicle foramen not examined. Trail short; nearly perpendicular to the disc.

Brachial valve gently convex around periphery of its disc but gently concave in area surrounding the elongate protegular node. Dorsal disc separated by a rather deep furrow from the ventrally directed trail.

Ribs low, rounded, 3-4 per 1 mm at anterior margin of the disc, crossed by somewhat stronger rugellae (about 2 per 1 mm anteriorly). When partly exfoliated, the rather coarse radially disposed papillae are exposed for examination.