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First report of a larval shell repair scar on a lingulate brachiopod; evidence of durophagous predation in the Cambrian pelagic realm?

Rebecca L. Freeman and James F. Miller
First report of a larval shell repair scar on a lingulate brachiopod; evidence of durophagous predation in the Cambrian pelagic realm?
Journal of Paleontology (July 2011) 85 (4): 695-702

Abstract

A dorsal valve of an Upper Cambrian lingulate brachiopod exhibits a repair scar on the anterior lateral edge of its larval shell. This species is characterized by an abrupt change in ornamentation from larval to postlarval growth. Shell material secreted in the injured area after the damage occurred exhibits ornamentation that is characteristic of postlarval growth, although equivalent growth exhibits characteristics of the larval stage. A break in the edge of the shell is visible, and the growth lines of the larval and postlarval shell were distorted until the broken area was filled in. Damage to the surface of the shell is interpreted to have been caused by the same event. Modern lingulate brachiopod larvae are planktotrophic and are interpreted to have been so throughout their long geologic history. Therefore, an environmental cause of shell damage seems unlikely and the injuries are interpreted to have been caused by an unknown durophagous predator. This specimen offers evidence that lingulate brachiopod larvae were able to survive shell breakage and repair their shells.


ISSN: 0022-3360
EISSN: 1937-2337
Coden: JPALAZ
Serial Title: Journal of Paleontology
Serial Volume: 85
Serial Issue: 4
Title: First report of a larval shell repair scar on a lingulate brachiopod; evidence of durophagous predation in the Cambrian pelagic realm?
Affiliation: Tulane University, Department of Earth and Environmental Science, New Orleans, LA, United States
Pages: 695-702
Published: 201107
Text Language: English
Publisher: Paleontological Society, Lawrence, KS, United States
References: 60
Accession Number: 2011-066809
Categories: Invertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Annotation: NSF grants EAR-8108621, EAR-8407281, and EAR-8804352
Illustration Description: illus. incl. sketch map
N39°15'00" - N39°15'00", W113°25'00" - W113°25'00"
Secondary Affiliation: Missouri State University, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, The Paleontological Society. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201137
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