Sairocaris centurion Schram & Horner, 1978

Taxonomy

Phyllocarid

Kingdom: Animalia
Phylum: Arthropoda
Class: Malacostraca
Order: Hoplostraca
Family: Sairocarididae
Genus: Sairocaris
Species: Sairocaris centurion
Author Citation Schram & Horner, 1978

Geological Time Scale

Eon: Phanerozoic
Era: Paleozoic
Period: Carboniferous
Sub Period: Mississippian
Epoch: Late
International Age: Serpukhovian

Stratigraphy

Big Snowy Group
Heath Formation
Bear Gulch Bed

Provenance

Acquired by: Purchase/Trade

Dimensions

Length: 10 cm

Location

Bear Gulch
Fergus County
Montana
United States

• bear gulch
• carboniferous
• heath shale
• montana
• sairocaris
• tff-oilshale-ar1112

Comments

Taxonomy from Factor & Feldman 1985.

Diagnosis from Factor & Feldman 1985,  p. 328: "Bivalved phyllocarid. Elongate telson with medial longitudinal carina, longer than pretelson segment, dorsally flexed at posterior end. Uropods reduced, blade-like, pretelson segment elongate. Fifth abdominal segment with circular notch in antero-ventral corner of pleuron.

Line drawing from Factor & Feldman 1985, p. 328;

Line bar represents 1 cm.
Identified by oilshale using Factor & Feldman 1985.

References:
Frederick R. Schram & John Horner (1978). "Crustacea of the Mississippian Bear Gulch Limestone of Central Montana". Journal of Paleontology 52 (2): 394–406.
Factor, D. F., and Feldmann, R. M. (1985) Systematics and paleoecology of malacostracan arthropods in the Bear Gulch Limestone (Namurian) of Central Montana. Annals of Carnegie Museum 54, p. 319-356.