Typhlokorynetes

Typhlokorynetes; Temporal range: Early Tremadocian PreꞒ Ꞓ O S D C P T J K Pg N
	T. plana
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Trilobita
Order:	Asaphida
Suborder:	Trinucleina
Family:	Raphiophoridae
Subfamily:	Endymioniinae
Genus:	Typhlokorynetes; Shaw, 1966
Binomial name
	Typhlokorynetes plana; (Raymond, 1937)
Synonyms
	Warburgella plana Raymond, 1937; Raymondaspis (in part);

Typhlokorynetes plana is a species of small, button-shaped asaphid trilobites of the family Raphiophoridae that lived during the Early Tremadocian of Vermont, United States.

Etymology

The generic epithet is a compound word of the Greek words "Typhlos," meaning "blind," and "Korynetes," which means "club-bearer," in reference to the animal's eyeless state, and the glabellum that is shaped in the outline of a club or bowling pin.^[1] The specific name "plana" refers to the flattened nature of the body.

History of taxonomy

The first fossils of this trilobite were described by P. E. Raymond in 1937 as a blind proetid that he named "Warburgella" plana.^[2] In 1959, "W." plana would be redescribed by H. B. Whittington as a species of Raymondaspis in the family Styginidae.^[3] Alan Shaw voiced a similar opinion when he moved it into its own genus and family, Typhlokorynetes in Typhlokorynetidae, in that it maybe a specialized styginid with unusual or aberrant sutures and hypostome anatomy.^[1] During the 1970s, it was then reappraised as a relative of Endymion in Raphiophoridae.

Occurrence

Specimens are known from the Highgate Formation in northwestern Vermont.

References

^ ^a ^b ^c Shaw, Alan B. "Paleontology of Northwestern Vermont. XII. Fossils from the Ordovician Highgate Formation." Journal of Paleontology (1966): 1312-1330.
^ RAYMOND, P.E., 1937, Upper Cambrian and Lower Ordovician Trilobita and Ostracoda from Vermont: Geol. Soc. America, Bull., v. 48, p. 1079-1146, 4 pls
^ WHITTINGTON, H. B., 1959a, Family Styginidae, in Treatise on invertebrate paleontology, pt. 0, Arthropoda 1: Lawrence, Kansas, Geol. Soc. America and Kansas Univ. Press, p. 365-367, Figs. 275-277

[shaw1966-1] Shaw, Alan B. "Paleontology of Northwestern Vermont. XII. Fossils from the Ordovician Highgate Formation." Journal of Paleontology (1966): 1312-1330.

[raymond-2] RAYMOND, P.E., 1937, Upper Cambrian and Lower Ordovician Trilobita and Ostracoda from Vermont: Geol. Soc. America, Bull., v. 48, p. 1079-1146, 4 pls

[whittington-3] WHITTINGTON, H. B., 1959a, Family Styginidae, in Treatise on invertebrate paleontology, pt. 0, Arthropoda 1: Lawrence, Kansas, Geol. Soc. America and Kansas Univ. Press, p. 365-367, Figs. 275-277

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