Basic info Taxonomic history Classification Included Taxa
Morphology Ecology and taphonomy External Literature Search Age range and collections

Dactylogonia

Strophomenata - Strophomenida - Furcitellidae

Synonyms
Synonymy list
YearName and author
1942Dactylogonia Ulrich and Cooper
1956Cyphomena Cooper pp. 840 - 841
1976Blyskavomena Havlicek p. 369
1977Cyphomena Mitchell
1977Dactylogonia Mitchell
2000Dactylogonia Williams et al. p. 227
2002Blyskavomena Sepkoski
2002Cyphomena Sepkoski
2002Dactylogonia Sepkoski
2017Dactylogonia Liljeroth et al.

Is something missing? Join the Paleobiology Database and enter the data

RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
superphylumLophotrochozoa
Lophophorata
PanbrachiopodaCarlson and Cohen 2020
RankNameAuthor
phylumBrachiopodaCuvier 1805
subphylumRhynchonelliformeaWilliams et al. 1996
classStrophomenataWilliams et al 1996
orderStrophomenidaOpik 1934
superfamilyStrophomenoideaKing 1846
familyFurcitellidae(Williams 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. †Dactylogonia Ulrich and Cooper 1942
show all | hide all
Dactylogonia alternata Cooper 1956
Dactylogonia blyskavensis Havlicek 1967
Dactylogonia costellata Liljeroth et al. 2017
Dactylogonia extensa Cooper 1956
Dactylogonia geniculata Ulrich and Cooper 1942
Dactylogonia obsoleta Butts 1926
Dactylogonia palustris Willard 1928
Dactylogonia semiglobosina Davidson 1870
Invalid names: Blyskavomena Havlicek 1976 [synonym], Cyphomena Cooper 1956 [synonym]
Diagnosis
ReferenceDiagnosis
G. A. Cooper 1956 (Cyphomena)Shell generally transversely subrectangular in outline, concavo-convex in profile; valves strongly geniculated toward the brachial valve. Surface marked by fine subequal radial costellae crossed by fine concentric lines. Costellae not grouped into zones of different sizes as in Dactylogonia. Pseudopimctate.

Pedicle valve with small but stout teeth ; thick plates extend as a rim nearly completely around the suboval muscle field. Diductor scars subcrescentic, elongate, located on each side of a short, low median ridge which divides the muscle field but is extended anteriorly for a short distance only. Incipient vascula media extend directly anteriorly from the anterior ends of the diductors. Foramen and pseudodeltidium leptaenoid.

Brachial interior with broad, shallow sockets, the inner wall of which is formed by the outer face of a broad, flat brachiophore ; notothyrial cavity filled by a thick platform which supports the cardinal process and nearly buries the brachiophore with lateral extensions. Median ridge short, extending from notothyrial platform and dividing the posterior adductors. Cardinal process formed of 2 narrow, short-shafted pieces with flat myophores. Chilidium strongly convex and covering part of the myophore surfaces. Adductor field narrowly triangular or arrow shaped in outline with the apex directed anteriorly; posterior adductors the larger, located outside the anterior pair and apparently divided into pairs by a more or less thick oblique ridge. Anterior pair elongate and separated by a short, low median ridge.