Brachiopoda : Eucalathis

Eucalathis


Sous-embranchement (subphylum) des Rhynchonelliformea Classe des Rhynchonellata Ordre des Terebratulida Sous-ordre des Terebratulidina Super-famille des Terebratuloidae Super-famille des Dyscolioidae Super-famille des Cancellothyroidea

Genus Eucalathis Fischer & Œhlert, 1890

[Type species = Terebratulina (?) murrayi Davidson, 1878 (p. 437)]

Small, subtrigonal, auriculate, ventribiconvex, anterior commissure rectimarginate or incipiently uniplicate, hinge straight; surface capillate with rare intercalations or granular; umbo short, obliquely truncate; deltidial plates short, triangular, disjunct. Pedicle collar present, loop chlidonophorid but transverse band dorsally directed, socket ridges as narrow plates uniting with cardinal process, and anteriorly with crural bases; lophophore with 2 single whorl spirals set at angle to plane of symmetry, filaments long.

Eocene - Present

Diagnosis from volume 5 of the
Treatise on Invertebrate Paleontology (2006)

Extant Species of Eucalathis

E. murrayi (Davidson, 1878)

E. tuberata (Jeffreys, 1878)

E. trigona (Jeffreys, 1878)

E. ergastica Fischer et Œl;hlert, 1890

E. rugosa Cooper, 1973

E. fasciculata Cooper, 1973

E. inflata Cooper, 1973

E. macrorhynchus Forster, 1974

E. cubensis Cooper, 1977

E. floridensis Cooper, 1977

E. magna Cooper, 1981

E. daphneae Bitner et Logan, 2016

E. malgachensis Bitner et Logan, 2016
Diagnosis

Diagnosis

Diagnosis
Diagnosis
Diagnosis

FIGURES : Eucalathis

Geographic distribution

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Eucalathis murrayi (Davidson, 1878)

Type locality: near Kermadec Isl. (38°33'S, 177°50'W, 1097 m)
Depth range: 185 - 3374 m m

Terebratulina (?) murrayi Davidson, 1878
Eucalathis costellata Cooper, 1981
Eucalathis rotundata Cooper, 1981

Diagnosis in preparation -

Eucalathis macrorhynchus Foster, 1974

Type locality: 54°51'S, 129° 46'W - 915-1153 m
Depth range: 326 - 1153 m

Diagnosis in preparation -

Eucalathis magna Cooper, 1981

Type locality: off Kergueken Is. (53°20.3'S, 72°29.2'E, 790 m)
Depth range: 207 - 402 et 790 m

Diagnosis in preparation -

Eucalathis daphneae Bitner et Logan, 2016

Type locality: Madagascar, Miriky cruise: st. DW3234, 13°27’S, 47°55’E, 187-247 m.
Depth range: 187-249 m

Diagnosis from Bitner & Logan, 2016

Eucalathis with single, broad, rounded costae nearly smooth in anterior half, and incomplete loop.

Eucalathis malgachensis Bitner et Logan, 2016

Type locality: , South Cap Sainte Marie, South Madagascar: Atimo Vatae cruise, st. CP 3614, 26°14’S, 45°09’E, 250-300 m.
Depth range: 122 - 910 m

Diagnosis from Bitner & Logan, 2016

Eucalathis with single, broad, rounded costae nearly smooth in anterior half, and incomplete loop.


Eucalathis murrayi (Davidson, 1878) Type locality: near Kermadec Isl. (38°33'S, 177°50'W, 1097 m) Depth range: 185 - 3374 m m Terebratulina (?) murrayi Davidson, 1878 Eucalathis costellata Cooper, 1981 Eucalathis rotundata Cooper, 1981 Diagnosis in preparation -

Eucalathis macrorhynchus Foster, 1974 Type locality: 54°51'S, 129° 46'W - 915-1153 m Depth range: 326 - 1153 m Diagnosis in preparation -

Eucalathis magna Cooper, 1981 Type locality: off Kergueken Is. (53°20.3'S, 72°29.2'E, 790 m) Depth range: 207 - 402 et 790 m Diagnosis in preparation -

Eucalathis daphneae Bitner et Logan, 2016 Type locality: Madagascar, Miriky cruise: st. DW3234, 13°27’S, 47°55’E, 187-247 m. Depth range: 187-249 m Diagnosis from Bitner & Logan, 2016 Eucalathis with single, broad, rounded costae nearly smooth in anterior half, and incomplete loop.

Eucalathis malgachensis Bitner et Logan, 2016 Type locality: , South Cap Sainte Marie, South Madagascar: Atimo Vatae cruise, st. CP 3614, 26°14’S, 45°09’E, 250-300 m. Depth range: 122 - 910 m Diagnosis from Bitner & Logan, 2016 Eucalathis with single, broad, rounded costae nearly smooth in anterior half, and incomplete loop.