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First Carboniferous protaspid larvae (Trilobita)

Rudy Lerosey-Aubril and Raimund Feist
First Carboniferous protaspid larvae (Trilobita)
Journal of Paleontology (July 2005) 79 (4): 702-718


The recovery of well-preserved silicified larvae from the early Tournaisian of Montagne Noire, southern France, allows the first description of the early ontogeny of proetoid trilobites, survivors of the end-Devonian Hangenberg extinction event. The fauna comprises various taxa that can only partly and tentatively be assigned to the genera Liobolina, Diacoryphe, and Pedinocoryphe without specific attribution. The close resemblance of these larvae to previously described proetoid larvae from the Ordovician and Devonian emphasizes the ontogenetic homogeneity of this superfamily. Moreover, it supports the view that the Proetida is composed of two clades: the Aulacopleuroidea/Bathyuroidea group and the Proetoidea. The Carboniferous anaprotaspides exhibit an unusually wide size-range that may provide evidence of the acquisition of an extended planktonic period in the early ontogeny of at least some Carboniferous proetoids. This change in the ontogenetic strategy may have enabled proetoid trilobites to survive during the end-Devonian biocrises.

ISSN: 0022-3360
EISSN: 1937-2337
Serial Title: Journal of Paleontology
Serial Volume: 79
Serial Issue: 4
Title: First Carboniferous protaspid larvae (Trilobita)
Affiliation: Universite de Montpellier II, Laboratoire de Paleontologie, Paleobiologie et Phylogenie, Montpellier, France
Pages: 702-718
Published: 20050701
Text Language: English
Publisher: Paleontological Society, Lawrence, KS, United States
References: 38
Accession Number: 2005-062466
Categories: Invertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. strat. col., 2 tables, geol. sketch map
N43°15'00" - N44°00'00", E02°30'00" - E04°15'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Abstract, Copyright, The Paleontological Society. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 200521
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