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A new genus and species of scalpellomorph cirriped from the Fairport Member, Carlile Shale (middle Turonian) of Kansas

Published online by Cambridge University Press:  14 July 2015

David S. Hirt
David S. Hirt*
Affiliation:
Department of Geological Sciences, Indiana University, Bloomington 47405
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Abstract

A proposed new genus of scalpellomorph cirriped, Tetrinis n. gen., based on T. serenuportus n. sp., is known from three Kansas localities in the middle part of the Fairport Member of the Carlile Shale where it is epizoic on the bivalve Inoceramus cuvieri. The stalked cirriped Stramentum elegans coexisted with T. serenuportus and the bryozoan Proboscina sp. was epizoic on S. elegans but not on T. serenuportus. The genus is readily distinguished from all other scalpellomorph cirripeds in the character of the capitulum, which comprises 28 slightly overlapping plates arranged in four whorls. Tetrinis serenuportus displays a large rostrum and an upper latus that is situated low in the capitulum between the scutum and tergum, allowing the two latter plates to touch. All umbos are apical except for that of the scutum, which is subapical and closer to the apex than to the base. The new form apparently has a narrow stratigraphic range and has potential as a biostratigraphic marker.

Type
Research Article
Information
Journal of Paleontology , Volume 66 , Issue 3 , May 1992 , pp. 454 - 461
Copyright
Copyright © The Paleontological Society 

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