DERMAL IRIDOPHORES IN SNAKES; CORRELATIONS WITH HABITAT ADAPTATION AND PHYLOGENY

Persistent Link:
http://hdl.handle.net/10150/289250
Title:
DERMAL IRIDOPHORES IN SNAKES; CORRELATIONS WITH HABITAT ADAPTATION AND PHYLOGENY
Author:
Kleese, William Carl
Issue Date:
1981
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
Deep continuous layers of iridophores were discovered in certain Asian Agkistrodon species. A survey of available snakes showed the banded iridophores to be present in North American Crotalus and Sistrurus also, indicating an unreported morphology to be a possible common phenomenon. Skin samples from 147 species and/or subspecies of snakes of the families Leptotyphlopidae, Boidae, Colubridae, Elapidae and Viperidae were examined and photographed by polarized light microscopy. Dermal iridophore patterns were visually identified and categorized as (1) isolated cells, (2) lightly layered, (3) moderately layered and (4) heavily layered. Selected specimens were examined and photographed by electron microscopy; isolated iridophore ultrastructure and layered iridophore ultrastructure patterns are illustrated and described. Reflectometry of four selected crotalids reveals positive correlation between iridophore quantities and albedo, but habitat adaptation and correlation of individual species/subspecies is difficult to show and only subjectively suggested. Published phylogenies of the species of the genera Agkistrodon, Calloselasma, Deinagkistrodon and Hypnale are revised to reflect taxonomic works and are correlated with iridophore pattern data. Phylogenetic relationships of Crotalus and Sistrurus are also revised with recent publications; they are neither supported nor contradicted because layered iridophores occur in all of their phylogenetic groups.
Type:
text; Dissertation-Reproduction (electronic)
Keywords:
Chromatophores.; Animal pigments.; Snakes.
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Graduate College; Animal Physiology
Degree Grantor:
University of Arizona

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleDERMAL IRIDOPHORES IN SNAKES; CORRELATIONS WITH HABITAT ADAPTATION AND PHYLOGENYen_US
dc.creatorKleese, William Carlen_US
dc.contributor.authorKleese, William Carlen_US
dc.date.issued1981en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractDeep continuous layers of iridophores were discovered in certain Asian Agkistrodon species. A survey of available snakes showed the banded iridophores to be present in North American Crotalus and Sistrurus also, indicating an unreported morphology to be a possible common phenomenon. Skin samples from 147 species and/or subspecies of snakes of the families Leptotyphlopidae, Boidae, Colubridae, Elapidae and Viperidae were examined and photographed by polarized light microscopy. Dermal iridophore patterns were visually identified and categorized as (1) isolated cells, (2) lightly layered, (3) moderately layered and (4) heavily layered. Selected specimens were examined and photographed by electron microscopy; isolated iridophore ultrastructure and layered iridophore ultrastructure patterns are illustrated and described. Reflectometry of four selected crotalids reveals positive correlation between iridophore quantities and albedo, but habitat adaptation and correlation of individual species/subspecies is difficult to show and only subjectively suggested. Published phylogenies of the species of the genera Agkistrodon, Calloselasma, Deinagkistrodon and Hypnale are revised to reflect taxonomic works and are correlated with iridophore pattern data. Phylogenetic relationships of Crotalus and Sistrurus are also revised with recent publications; they are neither supported nor contradicted because layered iridophores occur in all of their phylogenetic groups.en_US
dc.typetexten_US
dc.typeDissertation-Reproduction (electronic)en_US
dc.subjectChromatophores.en_US
dc.subjectAnimal pigments.en_US
dc.subjectSnakes.en_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineAnimal Physiologyen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.identifier.proquest8207900en_US
dc.identifier.oclc8712499en_US
dc.identifier.bibrecord.b13918151en_US
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