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Foliomena xinjiangensis

Strophomenata - Strophomenida - Foliomenidae

Taxonomy
Foliomena xinjiangensis was named by Zhan et al. (2014). Its type specimen is NIGP 158456, a valve (dorsal internal mould), and it is a 3D body fossil. Its type locality is AFT- X145. Querqueke, Kuruktag, which is in a Katian marine mudstone in the Yinpingshan Formation of China.

Sister species lacking formal opinion data

View classification of included taxa

Synonymy list
YearName and author
2014Foliomena xinjiangensis Zhan et al. pp. 133 - 134 figs. 8F–K, 9

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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
familyFoliomenidaeWilliams 1965
genusFoliomenaHavlicek 1952
speciesxinjiangensis

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
R. B. Zhan et al. 2014Foliomena with relatively elongate shell and a pairof posteriorly connected side septa in dorsal interior.

Tiny shell usually smaller than 5 mm, slightlyelongated semicircular, with length/width ratio average at 0.66and 0.78 for dorsal and ventral valves respectively, gentlyconcavo-convex in lateral profile; cardinal extremities rectan-gular or rounded, maximum shell width along hinge line orslightly in front of it. Ventral valve unevenly convex, deepestin posteromedial portion; ventral interarea planar, apsacline,about 6 percent of ventral length; delthyrium wide, without any covering plates observed. Apical spine in one small ventralvalve (Fig. 8H), about 15 percent of ventral length. Dorsal valve gently concave to nearly flat; dorsal interarea linear. Ornament of concentric growth lines, evenly distributed on entire shell shell surface, interrupted by some irregularly spaced coarse concentric undulations.Teeth small, wedge-like, without dental plates. Muscle field and other interior features not observed.