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Dactylogonia homostriata

Strophomenata - Strophomenida - Strophomenidae

Leptaena homostriata was named by Butts (1941). Its type specimen is USNM 97545, a shell, and it is a 3D body fossil.

It was recombined as Cyphomena homostriata by Cooper (1956) and Williams (1962); it was recombined as Dactylogonia homostriata by Candela and Harper (2014).

Synonymy list
YearName and author
1941Leptaena homostriata Butts p. 110 figs. pl. 95 f. 24, 25
1956Cyphomena homostriata Cooper p. 843 figs. pl. 223D f. 7; pl. 224B f. 9-20
1962Cyphomena homostriata Williams p. 203 figs. Pl. XX, figs. 3, 4
2014Dactylogonia homostriata Candela and Harper pp. Supplement 1

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phylumBrachiopodaCuvier 1805
subphylumRhynchonelliformeaWilliams et al. 1996
classStrophomenataWilliams et al 1996
orderStrophomenidaOpik 1934
superfamilyStrophomenoideaKing 1846
familyStrophomenidaeKing 1846
subfamilyFurcitellinaeWilliams 1965
genusDactylogoniaUlrich and Cooper 1942

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.

G. A. Cooper 1956Small, subrectangular in outline and with the hinge forming the widest part; sides gently oblique; anterolateral extremities narrowly rounded; anterior margin gently convex to truncated. Surface finely costellate, 4 to 6 costellae in a millimeter at the front margin of an adult.

Pedicle valve strongly convex in lateral profile, the greatest convexity located at about the middle ; anterior profile domed and with steep sides but the median part depressed by a sulcus. Visceral region nearly flat in profile; geniculated part narrowly rounded; trail gently convex in lateral profile. Visceral region gently convex ; trail moderately long and marked by a prominent sulcus. Flanks of trail bounding sulcus rounded and somewhat swollen.

Brachial valve gently concave, the deepest part located near the place of geniculation. Visceral region gently concave. Trail short, marked medianly by a low and inconspicuous fold. Muscle area narrowly arrow shaped, moderately thickened.
A. Williams 1962Subquadrate Cyphomena, about two-thirds as long as wide, strongly concavo-convex and sharply geniculate dorsally at about the 7-mm. growth-stage, with a well-developed median sulcus and a complementary fold in the ventral and dorsal portions of the geniculate trail; ornamentation consisting of fine costellae, numbering 5 per millimetre and cancellated by concentric lamellae, and also a few obscure rugae.