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Pleistocene Bats from San Josecito Cave, Nuevo Leon, Mexico By: J. Knox Jones (1929-1992) |
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Volume 9, No. 14, pp. 389 396
December 19, 1958
Pleistocene Bats from San Josecito Cave,
Nuevo León, México
BY J. KNOX JONES, JR.
UNIVERSITY OF KANSAS LAWRENCE 1958
UNIVERSITY OF KANSAS PUBLICATIONS, MUSEUM OF NATURAL HISTORY Editors: E. Raymond Hall, Chairman, Henry S. Fitch,
Robert W. Wilson
Volume 9, No. 14, pp. 389 396
Published December 19, 1958
UNIVERSITY OF KANSAS
Lawrence, Kansas
PRINTED IN
THE STATE PRINTING PLANT
TOPEKA, KANSAS 1958 27 5516
Pleistocene Bats from San Josecito Cave,
Nuevo León, México BY J. KNOX JONES, JR.
Some of the Pleistocene mammals from San Josecito Cave, near Aramberri,
Nuevo León, México, collected by field parties of the California
Institute of Technology under the direction of the late Professor
Chester Stock, have been reported previously (see Furlong, 1943;
Cushing, 1945; Stock, 1950; Hooper, 1952; Findley, 1953; Stock, 1953;
Handley, 1955; Jackway, 1958). In 1950, Professor Stock loaned a
portion of the San Josecito material to the University of Kansas for
identification. Included therein were 89 crania and rami of bats,
representing three families (Phyllostomidae, Desmodontidae and
Vespertilionidae) and five genera, each represented by a single
species. One of the species is here described as new. Three of the
kinds are known only from the Pleistocene and two are Recent species. The only previous mention of fossil bats from México known to me
concerns material from San Josecito Cave. Cushing (1945:182) mentioned
a "vampire bat" from the cave (see also Maldonado Koerdell, 1948:17),
and Handley (1955:48) based his description of Corynorhinus
tetralophodon on a specimen from San Josecito. Brief descriptions of the cave have been published by Miller (1943) and
Stock (1943). The precise age of the deposits is unknown;
stratification data did not accompany the material sent on loan to the
University of Kansas. However, most of the micro fauna is thought to
have come from the higher levels in the cave and is probably late
Pleistocene. The San Josecito Cave collections are currently the property of the Los
Angeles County Museum. I am grateful to Dr. E. Raymond Hall for permission to study the bats
from San Josecito Cave, to Dr. Robert W. Wilson for criticism of the
manuscript, and to Mr. Philip Hershkovitz for permission to use
comparative material at the Chicago Natural History Museum. Lucy Rempel
made the drawings from photographs by John M. Legler.
Leptonycteris nivalis (Saussure) Referred material. Seventy crania, LACM (CIT) 2951 54,
2956 64, 3114 22, 3124 25, 3127, 3131 35, 3137 41, 3143 55,
3942, 21 unnumbered, of which 35 are nearly complete,
lacking zygomatic arches, auditory bullae and some teeth;
three rami, one right, LACM (CIT) 3126, and two left,
unnumbered. Remarks. The long nosed bats from San Josecito Cave do not differ
appreciably from Leptonycteris nivalis longala Stains, the largest
Recent subspecies of the species, and the subspecies that occurs in the
same geographic area today. Average and extremes of three cranial
measurements of 22 specimens from San Josecito Cave, followed in
parentheses by the average and extreme measurements of 23 adult L. n.
longala from the type locality, 12 mi. S and 2 mi. E Arteaga, 7500
ft., Coahuila (after Stains, 1957: 356), are: Greatest length of skull,
28.2, 27.2 28.9 (27.5, 26.1 29.0); least interorbital constriction,
5.0, 4.8 5.4 (4.8, 4.1 5.4); breadth of braincase, 11.1, 10.6 11.6
(10.7, 10.1 11.2). The San Josecito specimens average larger than the
series of Recent specimens in all of these measurements, especially
breadth of braincase, but there is considerable overlap in each case
and the extremes of greatest length of skull and of least interorbital
constriction do not exceed the extremes in the Recent series.
Desmodus stocki , new species Holotype. Cranium, lacking post incisor dentition on the
left side, zygomatic arches and auditory bullae; Los Angeles
County Museum (CIT) No... Continue reading book >>
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