Rhinolophus chaseni, Sanborn, 1939

Sanborn, Colin Campbell, 1939, Eight New Bats Of The Genus Rhinolophus, Zoological Series Of Field Museum Of Natural History 24 (5), pp. 37-43 : 38-39

Rhinolophus chaseni sp. nov.

Rhinolophus minor Pousargues , Mission Pavie Indo-Chine, Etudes Diverses, 3, p. 554 ,1904; Kloss, Jour. Nat. Hist. Soc. Siam, 4, p. 80, 1921.

Type from Pulo Condore, off the southeast coast of Cochin China. No. 21.10.8.3 British Museum (Natural History). Adult male in alcohol. Collected November 12, 1920, by C. B. Kloss.

Characters. —An Oriental member of the megaphyllus group related to . malayanus , and with same wing formula.

Metacarpal of third finger shortest; metacarpals of fourth and fifth fingers about equal. Second phalanx of third finger less than one and one-half times the length of the first phalanx.

Like malayanus but sella wider and more constricted, lancet shorter and ear longer. The skull larger in every way but in general similar to that of malayanus . Upper premolar two in the toothrow; lower premolar three external.

Measurements.— Forearm 41.1; third finger, metacarpal 30.6, first phalanx 11.8, second phalanx 17.4; fourth finger, metacarpal 31.4, first phalanx 8.5, second phalanx 10.5;.fifth finger, metacarpal 31.7, first phalanx 9.3, second phalanx 10.9. Ear 21; tibia 20.6; tail 17.7. Base of sella 2.4, tip 2.

Skull: greatest length 18.8; condylo-basal length 16.1; palatal length 2.5; width of nasal swellings 5.4; interorbital width 2.6; zygomatic width 9.8; mastoid width 8.9; width of braincase 7.7; upper toothrow 7.3; width across canines 5; maxillary width 7.1; supraorbital length 5.

1939

Specimens examined.— One, the type. Also the cotypes and large series of . malayanus .

Remarks.— Rhinolophus chaseni , while not appearing to have any very outstanding characters, is different from any of the forms related to borneensis and malayanus and is geographically distant from all except malayanus . It is named for Dr. F. N. Chasen, Director of the Raffles Museum.