LT) > OF THE U N I VERSITY OF ILLINOIS S90-5 FI v.34 BIOLOGY -, Return this book on or before the Latest Date stamped below. Theft, mutilation, and underlining of books are reasons for disciplinary action and may result in dismissal from the University. University of Illinois Library L161— O-1096 'X 34' FIELDIANA • ZOOLOGY Published by CHICAGO NATURAL HISTORY MUSEUM Volume 34 JULY 23, 1954 No. 27 BATS FROM CHIMANTA-TEPUf, VENEZUELA WITH REMARKS ON CHOERONISCUS COLIN CAMPBELL SANBORN CURATOR, DIVISION OF MAMMALS The 1953 Venezuela Botanical Expedition of Chicago Natural History Museum explored the base and summit of the table moun- tain Chimanta-tepui. The expedition was in charge of Dr. Julian A. Steyermark, Curator of the Phanerogamic Herbarium. During the first month he was accompanied by Mr. Charles Griffin, who made a small but most interesting collection of five species of bats. These were taken on the west side of Chimanta-tepui at 1,300 feet (Camp 1) and 3,900 feet (Camp 3). Rhynchiscus naso Prince zu Wied Vespertilio naso Prince zu Wied, 1820, Reise Bras., 1: 251 (footnote). A series of seven females, including two juveniles, was taken at Camp 1. The forearms of the adults measure from 37.5 to 40.4 mm. Anoura geoffroyi geoffroyi Gray Anoura geoffroyi Gray, 1838, Mag. Zool. Bot., 2: 490. This genus appears to have been recorded but once from Vene- zuela, when a male was taken in Merida (Sanborn, 1933). Mr. Griffin collected a male and female at Camp 3 on April 9. The fore- arms measure 42.6 and 44.3 mm. in length, the latter measurement slightly larger than the maximum known in the subspecies. Lionycteris spurrelli Thomas Lionycteris spurrelli Thomas, 1913, Ann. Mag. Nat. Hist., (8), 12: 270— Colombia; Sanborn, 1941, Field Mus. Nat. Hist., Zool. Ser., 27: 376 — British Guiana. No. 734 289 ~ QF WE AUG 3 OF Illinois 290 FIELDIANA: ZOOLOGY, VOLUME 34 One female, collected at Camp 3, represents the third record and fourth known specimen of this bat. It is dull brown in color and the hairs are nearly uniform from base to tip. Artibeus jamaicensis jamaicensis Leach Artibeus Jamaicensis Leach, 1821, Trans. Linn. Soc. London, 13, pt. 1, p. 75 — Jamaica. A male was taken at Camp 1 in a bat net. Its forearm measures 58.5 mm. Choeroniscus sp. The expedition collected a series of eight (two males and six females) of this genus. They were found roosting on the under side of a fallen tree that lay over a stream flowing through a deep gully or ditch. All the specimens are preserved in alcohol. In color they are close to Blackish Brown No. 3 (Ridgway) above. The tips of the hairs are almost black, the bases close to Mummy Brown. The under parts are lighter, being more brownish and less black. The males are much smaller than the females. The forearms are 34.6-35.0 mm. as against 36.8-37.5 mm., and the skull length and the length of the tooth row are also shorter. This series has been compared with specimens of C. godmani only, a species that is smaller and in which there is no great difference in size between the sexes. The color in godmani is a little lighter. The female type of intermedia from Trinidad has an upper tooth row length of 7.7 mm. — a millimeter shorter than in the Venezuela females. This measurement in the male type of inca from south- eastern Peru is 7.8 mm., or almost equal to that of the male from Venezuela. Two specimens from Kartabo, British Guiana, a female in alcohol with the skull removed and cleaned, and an unsexed skull only, lent by the American Museum of Natural History, are about the size of the Venezuelan series. The teeth appear to be subject to changes; for example, one female from Venezuela has an extra molar on one side of the lower jaw, half the size of the other molars. One male has two lower middle molars, pressed together, with only the opposite ends of each tooth erupted above the jaw bone. A very old female has lost half the teeth on one side above and below. There is so little comparative material available and so much information lacking about the known species that the naming of /,„ SANBORN: BATS FROM CHIMANTA-TEPUf, VENEZUELA 291 another does not seem justifiable at this time. The notes on this series are given as a matter of record. It is believed that the speci- mens may prove to be C. inca from southeastern Peru. We wish to thank Mr. George G. Goodwin for the loan of speci- mens in the American Museum of Natural History. Measurements. — (Male and 2 females): forearm 34.1, 36.8, 37.1 mm.; tibia 13.0, 13.3, 13.6, calcar 7.1, 6.9, 6.0; tail 9.0, 7.9, 9.5; third finger, metacarpal 35.6, 36.6, 37.6, first phalanx 12.8, 14.0, 13.4, second phalanx 16.7, 18.2, 17.7; fourth finger, metacarpal 32.9, 34.2, 34.0, first phalanx 8.5, 9.2, 9.1, second phalanx 11.3, 13.1, 11.8; fifth finger 30.8, 32.5, 30.5, first phalanx 7.5, 8.2, 8.3, second phalanx 10.8, 12.4, 12.2; nose leaf 3.4 x 5.5, 3.7 x 6.0, 3.6 x 5.7. Skull (male and 3 females) : greatest length 22.9, 24.0, 24.5, 24.5; condylo- basal length 22.1, 22.9, 23.6, 23.6; palatal length 14.6, 15.0, 15.9, 15.8; interorbital width 3.8, 3.6, 3.4, 3.4; mastoid width 8.5, 8.8, 8.6, 8.9; width of brain case 8.5, 9.0, 8.9, 8.9; upper tooth row C-M3' 7.9, 8.9, 8.7, 8.8; width across base of canines 3.6, 3.8, 3.9, 3.9; width across last molars 4.4, 4.8, 4.6, 4.7; length of teeth (1 female) PM3 1.1, PM4 0.9, Ml 0.9, M2 0.9, pml 1.2, ml 1.2. REMARKS ON CHOERONISCUS The genus Choeroniscus with minor as the genotype was founded by Oldfield Thomas in 1928 for the species minor, intermedia, godmani, and inca, which had previously been in the genus Choero- nycteris. In Choeroniscus the skull is of normal shape with the muzzle shorter than the brain case, and the cusps of the lower premolars are subequal. There have been recorded but 18 specimens of Choeroniscus; minor 5; intermedia 3; godmani 9, and inca 1. The known range of the genus includes Guatemala, Honduras, Costa Rica (godmani); Trinidad (intermedia); Dutch Guiana, Ecuador, Rios Jurua and Tapajos, Amazonas, Brazil (minor); and Department of Cuzco, Peru (inca). The species are much alike in size, with forearms of 32.4 to 36.1 mm. They are similar in color, all being described above as "dark brown" (minor), snuff brown (intermedia), "dull uniform brown" and "uniform Mummy Brown" (godmani), and "the usual dark brown" (inca). In all, the bases of the hairs above are lighter and the under parts of the body lighter. Our knowledge of the genus and its species is far from complete, but the species are undoubtedly very closely related. Thomas has suggested that intermedia may be the same as minor. 292 FIELDIANA: ZOOLOGY, VOLUME 34 Choeroniscus Thomas Choeroniscus Thomas, 1928, Ann. Mag. Nat. Hist., (10), 1: 120; Sanborn, 1943, Field Mus. Nat. Hist., Zool. Ser., 24: 272, 274 (external characters). Choeroniscus minor Peters Choeronycteris minor Peters, 1868, Monatsber. Akad. Wiss. Berlin, 1868: 366— Dutch Guiana; Dobson, 1878, Cat. Chirop., p. 511, pi. 27, figs. 6, 6a (teeth) — Brazil (Rio Cupari, Rio Tapajos, Province of Aveiro) ; Festa, 1906, Boll. Mus. Zool. Anat. Comp. Torino, 21, no. 524, p. 5 — Ecuador; Lima, 1926, Rev. Mus. Paulista, 14: 76 — Brazil (Rio Jurua; meas.); Cunha Vieira, 1942, Arq. Zool. Est. Sao Paulo, 3: 322 (Lima specimen). Measurements. — Forearm 34.0 mm. (Peters); 1.35 inches=34.5 mm. (Dobson); male 34.0 mm. (Lima). No skull measurements appear to have been published. Choeroniscus intermedia Allen and Chapman Choeronycteris intermedia Allen and Chapman, 1893, Bull. Amer. Mus. Nat. Hist., 5: 207— Princetown, Trinidad; Thomas, 1912, Ann. Mag. Nat. Hist., (8), 10: 404 (may equal minor Dobson); Vesey-Fitzgerald, 1936, Trop. Agr., 13: 161— Trinidad; Goodwin, 1953, Bull. Amer. Mus. Nat. Hist., 102: 248 (type meas.). Measurements. — Forearm: male 33.5 mm., female 34.5 (Allen and Chapman), 36.0 (Goodwin). Skull: greatest length 22.5; greatest breadth 8.4; length of maxillary tooth row 7.7 (Goodwin). Choeroniscus godmani Thomas Choeronycteris minor Dobson, 1880, Rep. British Asso., p. 28 — Guatemala. Choeronycteris Godmani Thomas, 1903, Ann. Mag. Nat. Hist., (7), 1: 288— Guatemala. Choeroniscus godmani Thomas, 1928, Ann. Mag. Nat. Hist., (10), 11: 122; Goodwin, 1942, Bull. Amer. Mus. Nat. Hist., 79: 129— Honduras; 1946, Bull. Amer. Mus. Nat. Hist., 87: 312— Costa Rica. Measurements. — Forearm (8 specimens) 32.5-35.0 mm. Skull (2 specimens, male and female): greatest length 19.8-21.0 mm., condylo-basal length 19.3-20.3; palatal length 12.0-12.3; interorbital width 3.7-3.9; mastoid width 8.0-8.4; width of brain case 7.9; length of upper tooth row (7 specimens) 6.9-7.5. Specimens examined. — HONDURAS: La Flor Archaga, 2 males; Cantoral, 1 male. COSTA RICA: San Jose", 2 males, 2 females, 1 no sex. All lent by the American Museum of Natural History. Choeroniscus inca Thomas Choeronycteris inca Thomas, 1912, Ann. Mag. Nat. Hist., (8), 10: 404— Peru. Choeroniscus inca Thomas, 1928, Ann. Mag. Nat. Hist., (10), 1: 122. SANBORN: BATS FROM CHIMANTA-TEPUf, VENEZUELA 293 Measurements of male type (after Thomas). — Forearm 33.0 mm. Skull: greatest breadth (brain case?) 8.0 mm.; interorbital breadth 4.0; front of canine to back of M3 7.8; length of P3 0.8, P4 0.9, Ml 1.1, M2 1.1, p4 0.9, ml 1.0. REFERENCES GOODWIN, GEORGE G. 1953. Catalogue of type specimens of recent mammals in the American Mu- seum of Natural History. Bull. Amer. Mus. Nat. Hist., 102: 207-412. RIDGWAY, ROBERT 1912. Color standards and color nomenclature. Washington, D.C. SANBORN, COLIN CAMPBELL 1933. Bats of the genera Anoura and Lonchoglossa. Field Mus. Nat. Hist., Zool. Ser., 20: 23-28. LIBRARY UNIVERSITY OF ILLINOIS-URBANA