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Eoplectodonta (Eoplectodonta) semirugata plicata

Strophomenata - Strophomenida - Sowerbyellidae

Taxonomy
Eoplectodonta semirugata plicata was named by Williams (1962). Its type specimen is BB.26050, a valve (Exterior of pedicle valve), and it is a 3D body fossil.

It was recombined as Eoplectodonta (Eoplectodonta) semirugata plicata by Candela and Harper (2014).

Sister species lacking formal opinion data
E. estriatacostatus, E. paracostata

Synonymy list
YearName and author
1962Eoplectodonta semirugata plicata Williams p. 182 figs. PI. XVII, figs. 28-31, 33-35
2014Eoplectodonta (Eoplectodonta) semirugata plicata 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
subphylumRhynchonelliformeaWilliams et al. 1996
RankNameAuthor
classStrophomenataWilliams et al 1996
orderStrophomenidaOpik 1934
superfamilyPlectambonitoideaJones 1928
familySowerbyellidaeOpik 1930
subfamilySowerbyellinaeOpik 1930
genusEoplectodontaKozlowski 1929
subgenusEoplectodontaKozlowski 1929
speciessemirugata()
subspeciesplicata()

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 1962Semicircular, concavo-convex Eoplectodonta most commonly subcarinate in transverse profile with a pair of lateral plicae, pedicle valve over one-half as long as wide; radial ornamentation consisting of differentially thickened parvicostellae, with a modal count of 15 costellae per 2 mm. in the median portions of pedicle valves about 5 mm. anterior of the umbones; postero-lateral rugae paired, acutely inclined to the hinge-line and most commonly numbering less than 7 within 5 mm. of the right side of the ventral umbo; hinge-line denticulate in adult stages of growth; dental lamellae short and divergent, elliptical impressions of ventral muscle-field separated by median ridge and about one-sixth as long as the pedicle valve; median septum of brachial valve developing later than the lateral pair, becoming strong and high.