Chondrichthyan life history styles as revealed by the 320 million years old Mississippian of Montana

@article{Lund2004ChondrichthyanLH,
  title={Chondrichthyan life history styles as revealed by the 320 million years old Mississippian of Montana},
  author={Richard Lund},
  journal={Environmental Biology of Fishes},
  year={2004},
  volume={27},
  pages={1-19}
}
  • R. Lund
  • Published 2004
  • Environmental Science
  • Environmental Biology of Fishes
SynopsisChondrichthyans comprise 55 of the 94 vertebrate species found to date in the Mississippian marine Bear Gulch Limestone 6 km by 19 km tropical bay. The chondrichthyan-osteichthyan faunal proportions differ strongly from those of modern marine fish faunas. Secondary sexual dimorphism, size partitioning, life period segregation, and sexual segregation, reinforce the considerable morphological specializations among the chondrichthyans that were involved in the maintenance of this diversity… 

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

TLDR
These analyses lend new insight into the adaptive radiations of Chondrichthyes and Osteichthyes subsequent to the Upper Devonian mass extinctions.

Late Viséan Pelagic Chondrichthyans from Northern Europe

The relatively rich assemblages of shark teeth from pelagic limestone (Mississippian, late Viséan, late Asbian—middle Brigantian) of three northern European regions: the Rhenish Mountains (Westenfeld

High-latitude Chondrichthyans from the Late Devonian (Famennian) Witpoort formation of South Africa

Abstract New material from the Late Devonian Witpoort Formation (Witteberg Group, Cape Supergroup) of Waterloo Farm (Grahamstown, South Africa) includes teeth, spines, and rare endoskeletal remains

The earliest chimaeriform fish from the Carboniferous of Central Russia

The ancestry of chimaeriform chondrichthyan fishes can be traced back to the Late Triassic (∼220 Ma). To date, only one chimaeriform suborder, the Echinochimaeroidei, has been recognized from the

From AdAPTiVe rAdiATions T o BioTic crises in PAlAeoZoic Ver TeBrATes: A GeoBioloGicAl APProAch

  • A. Blieck
  • Environmental Science, Geography
  • 2011
TLDR
At least two of the bioevents which are characteristic for the rise of Palaeozoic vertebrates may be related with an increase in the global marine oxygen rate, viz., appearance of euvertebrates during the Great Ordovician Biodiversification Event (GOBE), and the radiation of large gnathostomes (in particular placoderms) during the Devonian adaptive radiation and Predation Revolution of vertebrates.

Relationships of the Chimaeriformes and the basal radiation of the Chondrichthyes

  • R. LundE. Grogan
  • Environmental Science
    Reviews in Fish Biology and Fisheries
  • 2004
TLDR
Morphological examination of fossil chondrichthyans indicates that the plesiomorphous state of the gnathostome suspensorium is autodiastylic and that complex labial cartilages are primitive and likely to have been critical to the mechanical architecture of the first jaws.

Two new iniopterygians (Chondrichthyes) from the Mississippian (Serpukhovian) Bear Gulch Limestone of Montana with evidence of a new form of chondrichthyan neurocranium

TLDR
The neurocranium is unique among known chondrichthyans in presenting anterior ethmosphenoid and posterior otico-occipital units separated by an intracranial joint.

Utilisation of a tropical bay as a nursery area by sharks of the families Carcharhinidae and Sphyrnidae

TLDR
At least eight species of sharks of the families Carcharhinidae and Sphyrnidae use Cleveland Bay in northern Australia as a communal nursery area, with the highest numbers of juveniles occur when prey species are the most abundant, and when temporal separation of some seasonally-occurring species of shark in effect.

The geological and biological environment of the Bear Gulch Limestone (Mississippian of Montana, USA) and a model for its deposition

The Bear Gulch Limestone (Heath Formation, Big Snowy Group, Fergus County, Montana, USA) is a Serpukhovian (upper Mississippian, Namurian E 2 b) Konservat lagerstatte, deposited in the Central

References

SHOWING 1-10 OF 36 REFERENCES

Evolutionary Aspects of Reproduction in Cyclostomes and Cartilaginous Fishes

TLDR
What is known of selected morphological and physiological aspects of reproduction in cyclostomes and chondrichthyan fishes is examined and the contribution this makes to the authors' knowledge of the ways in which reproduction may have evolved in these animals and in general is evaluated.

Deposition of the Bear Gulch Limestone: a Carboniferous Plattenkalk from central Montana

The Carboniferous Bear Gulch Limestone of the central Montana Big Snowy Trough is a lithographic limestone analogous to the plattenkalk carbonates of the Mesozoic European/Middle Eastern Tethyan

The asteroid, Lepidasterella montanensis n. sp., from the Upper Mississippian Bear Gulch Limestone of Montana

TLDR
This is the first many-armed asteroid reported from the interval between the Upper Devonian and the Lower Jurassic, and Lepidasterella is removed from the Taeniactinidae and reassigned to the Helianthas- teridae.

Preliminary report on the age and palynology of the Bear Gulch Limestone (Mississippian, Montana)

  • Robt S. Cox
  • Geology, Environmental Science
    Journal of Paleontology
  • 1986
Palynostratigraphic study of the Bear Gulch Member of the Heath Formation, central Montana, indicates an Upper Mississippian age for the deposit corresponding to Carboniferous palynofloral zone TK

The morphology of Falcatus falcatus (St. John and Worthen), a Mississippian stethacanthid chondrichthyan from the Bear Gulch Limestone of Montana

TLDR
Falcatus falcatus, with many more males than females, fits a behavioral model of male display-courtship and female choice, and is erected for the species and for the related F. hamatus and F. proclivus.

On Damocles serratus, nov. gen. et sp. (Elasmobranchii: Cladodontida) from the Upper Mississippian Bear Gulch Limestone of Montana

TLDR
The specimens, from the Upper Mississippian Bear Gulch Limestone of Montana, are closest to the Stethacanthidae although they lack a modified dorsal fin following the spine and have prominent metapterygia in the pelvic fins.

Reproduction and Development in Chondrichthyan Fishes

TLDR
Phylogenetic position, geographical distribution, benthic vs. pelagic habitat, adult size, egg-embryo size, feeding ecology, and embryonic osmoregulation are factors in the retention of oviparity or the evolution of viviparity.

Hardistiella montanensis n. gen. et sp. (Petromyzontida) from the Lower Carboniferous of Montana, with remarks on the affinities of the lampreys

ABSTRACT Hardistiella montanensis n. gen. et sp. from the Lower Carboniferous (Namurian) Bear Gulch Limestone Member of the Heath Formation, Montana, is the only lamprey known to retain a clearly

The determinants of sexual segregation in the scalloped hammerhead shark,Sphyrna lewini

  • A. Klimley
  • Environmental Science, Biology
    Environmental Biology of Fishes
  • 2004
TLDR
It is suggested that female segregation increases fitness, resulting in more rapid growth for the former sex, matching the female reproductive lifetime to that of males.