Proceedings of the United States National Museum . Kane County:Crocodile Cave, 4 miles north of Kanab (Hardy, 1941, p. 293). San Juan County:5 miles northwest of Monticello* (Benson, 1954, p. 117). Idaho: Canyon County:15 miles southwest of Caldwell* (Tucker, 1957, p. 406). Montana: YellowstoneCounty: Billings* (Nicholson, 1950, p. 197). Genus Plecotus E. Geoffroy Saint-Hilaire The synonymy is given under the subgenera. Type species: Vespertilio auritus Linnaeus. Distribution: Temperate parts of North America, Eurasia, andnorthern Africa (Palaearctic and Nearctic regions) (fig. 11). Descriptio
Proceedings of the United States National Museum . Kane County:Crocodile Cave, 4 miles north of Kanab (Hardy, 1941, p. 293). San Juan County:5 miles northwest of Monticello* (Benson, 1954, p. 117). Idaho: Canyon County:15 miles southwest of Caldwell* (Tucker, 1957, p. 406). Montana: YellowstoneCounty: Billings* (Nicholson, 1950, p. 197). Genus Plecotus E. Geoffroy Saint-Hilaire The synonymy is given under the subgenera. Type species: Vespertilio auritus Linnaeus. Distribution: Temperate parts of North America, Eurasia, andnorthern Africa (Palaearctic and Nearctic regions) (fig. 11). Description: Supraorbital region sharply ridged or smoothlyrounded (fig. 4); temporal ridges remain apart or coalesce to formsagittal crest; brain case relatively short; zygoma relatively heavy orlight, with postorbital expansion in middle or posterior third of arch;median postpalatal process absent or a spine-like prominence; auditorybulla rouglily circular in outline; presternum wider than long. 49725&—59 3 128 PROCEEDINGS OF THE NATIONAL MUSEUM7CP. Figure 11.—Distribution of Plecotus, showing coincidence with the North Temperate Zone(here defined as a region having an average annual temperature between 35° and70° F.). Upper incisors not in line with remainder of tooth row (lingual);I^ simple or bifid (fig. 2), much larger than P; P not touching canine;P^ small; hypocone absent and protocone reduced posteriorly in M^and M^; size of third commissure and metacone variable in M^; lowercanine much exceeding P4 in height, and possessing a well defined, al-though small, anterointernal basal cusp; Pi and P3 small and crowdedor not; P4 single-rooted or double-rooted and lacking a weU definedmetaconid cusp. Muzzle provided with dorsolateral glandular masses which in someforms rise above the muzzle as peculiar lumps (fig. 7); nostril openingssmall and of primitive vespertilionid type or large, opening upward,and peculiarly extended posteriorly (fig. 8); auricle and tragus large(fig. 9); tr
Size: 2088px × 1197px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
