Categories
- Antiques & Collectibles 13
- Architecture 36
- Art 47
- Bibles 22
- Biography & Autobiography 809
- Body, Mind & Spirit 47
- Business & Economics 24
- Computers 4
- Cooking 94
- Crafts & Hobbies 3
- Drama 346
- Education 45
- Family & Relationships 34
- Fiction 11809
- Games 19
- Gardening 17
- Health & Fitness 31
- History 1377
- House & Home 1
- Humor 147
- Juvenile Fiction 1873
- Juvenile Nonfiction 202
- Language Arts & Disciplines 88
- Law 16
- Literary Collections 686
- Literary Criticism 179
- Mathematics 13
- Medical 41
- Music 39
- Nature 179
- Non-Classifiable 1768
- Performing Arts 7
- Periodicals 1453
- Philosophy 62
- Photography 2
- Poetry 896
- Political Science 202
- Psychology 40
- Reference 154
- Religion 446
- Science 126
- Self-Help 6
- Social Science 80
- Sports & Recreation 34
- Study Aids 3
- Technology & Engineering 59
- Transportation 23
- Travel 463
- True Crime 29
Pleistocene Bats from San Josecito Cave, Nuevo Leon, Mexico
by: J. Knox Jones
Description:
Excerpt
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.
Holotype.—Cranium, lacking post-incisor dentition on the left side, zygomatic arches and auditory bullae; Los Angeles County Museum (CIT) No. 3129; from Pleistocene deposits of San Josecito Cave, near Aramberri, Nuevo León, México.
Referred material.—Twelve additional partial crania, LACM (CIT) 2946-50, 3127-30, 3940-41, 2 unnumbered.
Diagnosis.—Resembling the Recent Desmodus rotundus but differing from it as follows: Skull larger (see measurements and ), heavier and more massive; rostrum and braincase relatively as well as actually broader, interorbital region relatively more constricted; braincase more rounded (less elongate) as viewed from above; nasals less concave in lateral view; narial vacuity broader in relation to greatest length of skull, more nearly heart-shaped; palate broad, less concave medially; mesopterygoid fossa relatively and actually broader anteriorly, the sides nearly parallel; zygomatic arches (judging from No....