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Author: JAMES ARTHUR PETERS
Publisher:
ISBN:
Category : Snakes
Languages : en
Pages : 792
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Book Description
Author: JAMES ARTHUR PETERS
Publisher:
ISBN:
Category : Snakes
Languages : en
Pages : 792
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Book Description
Author: James Arthur Peters
Publisher:
ISBN:
Category : Colubridae
Languages : en
Pages : 256
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Book Description
Author: Larry David Wilson
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 44
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Book Description
Author: Larry David Wilson
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 84
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Book Description
Author: Charles W. Myers
Publisher:
ISBN:
Category : Amnesteophiini
Languages : en
Pages : 33
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Book Description
The name Enicognathus melanauchen Jan belongs to a currently unrecognized but apparently valid species of small snake described some 140 years ago from an unknown locality in Bahia, Brazil; the unique specimen is in the Nationaal Natuurhistorisch Museum, Leiden. Attempts were unsuccessful to associate it with named genera of the colubrid subfamilies Xenodontinae, Dipsadinae, Colubrinae, and Natricinae; consequently, no basis was found for challenging the provenance. The genus Amnesteophis and tribe Amnesteophiini therefore are erected for the species. (The snake generic name Enicognathus and the emendation Henicognathus are both junior homonyms of bird names.) Assignment to Xenodontinae is partly on geographic grounds as well as on hemipenial and osteological comparisons with the other colubrid subfamilies mentioned. Tribe Amnesteophiini differs from other tribes in Xenodontinae by combination of three unusual character states: (1) straight-line configuration of posterior maxillary teeth; (2) lack of hemipenial calyces; and (3) an unforked sulcus spermaticus. Hemipenial calyces also are absent in the Xenodontini, and an unforked sulcus spermaticus occurs in one species of Echinantherini (Taeniophallus nicagus). Amnesteophis melanauchen somewhat resembles Taeniophallus occipitalis in color pattern and 15 dorsal scale rows, but A. melanauchen differs externally from all Taeniophallus in having feebly keeled dorsal scales. The provenance and taxonomic placement of Amnesteophis needs to be corroborated by new specimens, or refuted by new insight on relationships and geographic origin. Comparisons made for this study shed light on a few groups of dipsadines. The tribal name "Leptodeirini Jenner" auctorum is nomenclaturally unavailable and invalid since it was proposed in an unpublished thesis (Jenner, 1981) that cannot subsequently be used as an indication or bibliographic reference in order to confer availability (contra Dowling et al., 1983). The diagnostic character of a simple sulcus spermaticus does not strictly characterize the type genus Leptodeira as originally assumed. Several molecular studies have failed to corroborate monophyly for the group of genera originally and subsequently assigned to the "Leptodeirini," although two genera (Imantodes + Leptodeira) consistently received strong support. The biogeographically and ecologically successful Imantodes and Leptodeira, which share large geographic ranges between the tropics of Cancer and Capricorn, are placed in the new tribe Imantodini. In addition to molecular support, the loss of bifurcation of the sulcus spermaticus (Imantodes and some Leptodeira) or reduction to a small terminal fork or expanded flat area (other Leptodeira) sets off the mainly scansorial Imantodini from all other Dipsadinae except the terrestrial Mesoamerican-North American night-snakes, which appear to form an unnamed clade. The dipsadine genus Rhadinaea Cope (sensu Myers, 1974) is further partitioned by the resurrection of Rhadinella Smith, 1941, which equates to the godmani species group of 15 Middle American species. The maxillary dentition in Rhadinella is superficially similar to that of Amnesteophis in the straight-line arrangement of several posteriorly enlarged teeth (ultimate fang not offset). Similar apomorphic dentition is shared with Lower Central American Trimetopon, which differs from Rhadinella in tendency toward diminutiveness and lack of a basal nude pocket on the hemipenis. Offset fangs (whether grooved or smooth) appear symplesiomorphic within most genera of Xenodontinae and Dipsadinae, although possibly synapomorphic for these groups combined.
Author: John Wellman
Publisher: Good Press
ISBN:
Category : Nature
Languages : en
Pages : 57
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Book Description
In 'A Revision of Snakes of the Genus Conophis', John Wellman presents a comprehensive analysis of the snakes belonging to the Family Colubridae in Middle America. The book meticulously details the taxonomy, morphology, and distribution of the snakes, providing valuable insights for both herpetologists and nature enthusiasts. Wellman's writing style is both informative and engaging, making the complex subject matter accessible to a wide audience. This book is a must-read for anyone interested in the biodiversity of snakes in this region. Wellman's attention to detail and extensive research set this work apart in the field of herpetology. His revisions and classifications are sure to influence future studies in the area. John Wellman's passion for snakes and dedication to the subject shine through in this scholarly work, making it a valuable addition to the library of any aspiring biologist or avid reader fascinated by the natural world.
Author: Charles W. Myers
Publisher:
ISBN:
Category : Amnesteophiini
Languages : en
Pages : 0
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Book Description
The name Enicognathus melanauchen Jan belongs to a currently unrecognized but apparently valid species of small snake described some 140 years ago from an unknown locality in Bahia, Brazil; the unique specimen is in the Nationaal Natuurhistorisch Museum, Leiden. Attempts were unsuccessful to associate it with named genera of the colubrid subfamilies Xenodontinae, Dipsadinae, Colubrinae, and Natricinae; consequently, no basis was found for challenging the provenance. The genus Amnesteophis and tribe Amnesteophiini therefore are erected for the species. (The snake generic name Enicognathus and the emendation Henicognathus are both junior homonyms of bird names.) Assignment to Xenodontinae is partly on geographic grounds as well as on hemipenial and osteological comparisons with the other colubrid subfamilies mentioned. Tribe Amnesteophiini differs from other tribes in Xenodontinae by combination of three unusual character states: (1) straight-line configuration of posterior maxillary teeth; (2) lack of hemipenial calyces; and (3) an unforked sulcus spermaticus. Hemipenial calyces also are absent in the Xenodontini, and an unforked sulcus spermaticus occurs in one species of Echinantherini (Taeniophallus nicagus). Amnesteophis melanauchen somewhat resembles Taeniophallus occipitalis in color pattern and 15 dorsal scale rows, but A. melanauchen differs externally from all Taeniophallus in having feebly keeled dorsal scales. The provenance and taxonomic placement of Amnesteophis needs to be corroborated by new specimens, or refuted by new insight on relationships and geographic origin. Comparisons made for this study shed light on a few groups of dipsadines. The tribal name "Leptodeirini Jenner" auctorum is nomenclaturally unavailable and invalid since it was proposed in an unpublished thesis (Jenner, 1981) that cannot subsequently be used as an indication or bibliographic reference in order to confer availability (contra Dowling et al., 1983). The diagnostic character of a simple sulcus spermaticus does not strictly characterize the type genus Leptodeira as originally assumed. Several molecular studies have failed to corroborate monophyly for the group of genera originally and subsequently assigned to the "Leptodeirini," although two genera (Imantodes + Leptodeira) consistently received strong support. The biogeographically and ecologically successful Imantodes and Leptodeira, which share large geographic ranges between the tropics of Cancer and Capricorn, are placed in the new tribe Imantodini. In addition to molecular support, the loss of bifurcation of the sulcus spermaticus (Imantodes and some Leptodeira) or reduction to a small terminal fork or expanded flat area (other Leptodeira) sets off the mainly scansorial Imantodini from all other Dipsadinae except the terrestrial Mesoamerican-North American night-snakes, which appear to form an unnamed clade. The dipsadine genus Rhadinaea Cope (sensu Myers, 1974) is further partitioned by the resurrection of Rhadinella Smith, 1941, which equates to the godmani species group of 15 Middle American species. The maxillary dentition in Rhadinella is superficially similar to that of Amnesteophis in the straight-line arrangement of several posteriorly enlarged teeth (ultimate fang not offset). Similar apomorphic dentition is shared with Lower Central American Trimetopon, which differs from Rhadinella in tendency toward diminutiveness and lack of a basal nude pocket on the hemipenis. Offset fangs (whether grooved or smooth) appear symplesiomorphic within most genera of Xenodontinae and Dipsadinae, although possibly synapomorphic for these groups combined.
Author: Mark O'Shea
Publisher: Princeton University Press
ISBN: 0691240663
Category : Nature
Languages : en
Pages : 240
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Book Description
A gorgeously illustrated guide to the incredible diversity of snakes around the world Snakes are found on every continent except Antarctica and have evolved to occupy a vast range of habitats, from mountains to oceans and deserts to rain forests. Snakes of the World explores their extraordinary diversity, with an in-depth introduction covering anatomy, behavior, habitats, reproduction, conservation, and other essential topics. This expert guide also includes profiles of some of the approximately 4,000 species of snakes, featuring examples from every family and subfamily. Each family profile highlights the remarkable appearance, characteristics, and lifestyle of notable snake species. Covering how snakes use venom or constriction to subdue their prey, how a snake’s appearance can aid camouflage or boast of its killing capacity, and how habitat destruction is jeopardizing the future of many species, Snakes of the World is an invaluable guide to these fascinating reptiles. Features more than 200 stunning color photographs Presents species profiles with a commentary, distribution map, and table of information Includes examples from every snake family and subfamily
Author: Charles W. Myers
Publisher:
ISBN:
Category :
Languages : en
Pages : 13
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Book Description
Author: Mark O'Shea
Publisher: University of Chicago Press
ISBN: 0226832864
Category : Science
Languages : en
Pages : 658
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Book Description
Updated to reflect the most recent species classifications, a second edition of the beautifully illustrated and beloved guide to 600 members of the suborder Serpentes. For millennia, humans have regarded snakes with an exceptional combination of fascination and revulsion. Some people recoil in fear at the very suggestion of these creatures, while others happily keep them as pets. Snakes can convey both beauty and menace in a single tongue flick, and so these creatures have held a special place in our cultures. Yet, for as many meanings as we attribute to snakes—from fertility and birth to sin and death—the real-life species represent an even wider array of wonders. Now in a new edition, reflecting the most recent species classifications, The Book of Snakes presents 600 species of snakes from around the world, covering roughly one in seven of all snake species. It will bring greater understanding of a group of reptiles that have existed for more than 160 million years and that now inhabit every continent except Antarctica, as well as two of the great oceans. This volume pairs spectacular photos with easy-to-digest text. It is the first book on these creatures that combines a broad, worldwide sample with full-color, life-size accounts. Entries include close-ups of the snake’s head and a section of the snake at actual size. The detailed images allow readers to examine the intricate scale patterns and rainbow of colors as well as special features like a cobra’s hood or a rattlesnake’s rattle. The text is written for laypeople and includes a glossary of frequently used terms. Herpetologists and herpetoculturists alike will delight in this collection, and even those with a more cautious stance on snakes will find themselves drawn in by the wild diversity of the suborder Serpentes.
