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GEOREF RECORD

A new early-diverging sphenodontian (Lepidosauria, Rhynchocephalia) from the Upper Triassic of Virginia, U.S.A.

Hans-Dieter Sues and Rainer R. Schoch
A new early-diverging sphenodontian (Lepidosauria, Rhynchocephalia) from the Upper Triassic of Virginia, U.S.A.
Journal of Paleontology (March 2021) 95 (2): 344-350

Abstract

A new taxon of sphenodontian reptile, Micromenodon pitti new genus new species is described from the Upper Triassic (Carnian) Vinita Formation of the Richmond basin of the Newark Supergroup in Virginia. It is diagnosed by a dorsoventrally deep facial process of the maxilla that extends for almost the entire anteroposterior length of the bone and by obtusely conical, strongly ribbed additional teeth in the maxilla that comprise a greatly enlarged tooth followed by smaller teeth posteriorly. Phylogenetic analysis found Micromenodon pitti n. gen. n. sp. as an early-diverging sphenodontian with fully acrodont tooth implantation. The maxillary dentition appears functionally suited for processing hard arthropod exoskeletons and snail shells. UUID: http://zoobank.org/40ed7cb6-4867-464b-8bfb-db07febfe97c


ISSN: 0022-3360
EISSN: 1937-2337
Coden: JPALAZ
Serial Title: Journal of Paleontology
Serial Volume: 95
Serial Issue: 2
Title: A new early-diverging sphenodontian (Lepidosauria, Rhynchocephalia) from the Upper Triassic of Virginia, U.S.A.
Affiliation: Smithsonian Institution National Museum of Natural History, Department of Paleobiology, Washington, DC, United States
Pages: 344-350
Published: 202103
Text Language: English
Publisher: Paleontological Society, Lawrence, KS, United States
References: 43
Accession Number: 2021-045742
Categories: Vertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Annotation: Includes appendix
Illustration Description: illus. incl. geol. sketch map
N37°31'00" - N37°31'00", W77°40'00" - W77°40'00"
Secondary Affiliation: Staatliches Museum fuer Naturkunde Stuttgart, DEU, Germany
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2021, American Geosciences Institute. Abstract, Copyright, The Paleontological Society. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 2021
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