NDLI: Ecomorphology of the Mississippian fishes of the Bear Gulch Limestone (Heath formation, Montana, USA)

Content Provider	Springer Nature Link
Author	Lund, Richard Greenfest Allen, Emily Grogan, Eileen D.
Copyright Year	2014
Abstract	The 323 million year old Bear Gulch Lens is recognized for the preservational quality and diversity of its fauna. Here we capitalize on these factors and 45 years of field data collection to test and evaluate the relationship between functional morphology and habitat in this Upper Mississippian marine fish fauna. The fishes are members of the Coelacanthiformes, Actinopterygii, Chondrichthyes, and Acanthodii. Fish were scored for 12 size-free morphological characters of functional significance that reflect habitat preference and resource utilization among extant fishes. Based on similarities in eco-coding, taxa are grouped into 13 ecomorphotypes, only one of which contained both actinopterygian and chondrichthyan taxa. Chondrichthyans are partitioned into nine highly diverse ecomorphotypes, spanning a spectrum of grossly different feeding, propulsive, and sexually dimorphic adaptations. These ecomorphotypes exhibit strong distributional trends relative to bay habitats. In contrast, Bear Gulch actinopterygians display few ecologically sensitive morphological deviations from a fusiform body plan and generalized feeding mechanism at this scale of analysis. The relative distribution of actinopterygian ecomorphotypes varies little across the bay habitats. The coelacanth ecomorphotype is restricted to lower bay habitats. These analyses lend new insight into the adaptive radiations of Chondrichthyes and Osteichthyes subsequent to the Upper Devonian mass extinctions.
Starting Page	739
Ending Page	754
Page Count	16
File Format	PDF
ISSN	03781909
Journal	Environmental Biology of Fishes
Volume Number	98
Issue Number	2
e-ISSN	15735133
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-07-30
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ecomorphology Chondrichthyes Actinopterygii Coelacanthiformes Adaptive radiation Paleoecology Paleozoic era Freshwater & Marine Ecology Zoology Animal Systematics/Taxonomy/Biogeography Environment Nature Conservation
Content Type	Text
Resource Type	Article
Subject	Aquatic Science Ecology, Evolution, Behavior and Systematics

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