Notiosorex evolis (Coues, 1877)

Russell A. Mittermeier & Don E. Wilson, 2018, Soricidae, Handbook of the Mammals of the World – Volume 8 Insectivores, Sloths and Colugos, Barcelona: Lynx Edicions, pp. 332-551 : 449

150.

Large-eared Gray Shrew

Notiosorex evolis

French: Musaraigne a oreilles longues / German: GroRohrWiistenspitzmaus / Spanish: Musarana gris de orejas largas

Taxonomy. Sorex (Notiosorex) evotis Coues, 1877 ,

“ Mazatlan [Sinaloa], Mexico.” Restricted by L. N. Carraway in 2007 to “lati- tude 23-21°N, longitude 106-42°W.”

Notiosorex evotis was previously included in N. crawford : but was recognized as a distinct species based primarily on morphometrics. Distributional limits of all species of Notiosorex are still somewhat unknown; additional sampling is needed. Monotypic.

Distribution. Sinaloa, Nayarit, Jalisco, and Michoacan (W Mexico).

Descriptive notes. Head-body 54-73 mm, tail 23-32 mm, ear 7-9 mm, hindfoot 11-13 mm; weight 5-6-3 g. The Large-eared Gray Shrew is the largest of the four species of Notiosorex . Dorsum is light grayish brown, and venter is white or pale gray. Feet are broad, with relatively short claws. Tail is ¢.33% of head-body length, unicolored pale gray, and covered with very short hairs. Ears are long and conspicuous, being the same color as dorsal pelage externally and pinkish internally; eyes are small but large compared with other shrews; and snout is pink with dark line on ridge extending to tip of rostrum. Females have three inguinal mammae. Paroccipitals are low set and extend at an oblique angle from cranium; coronoid processes are broad relative to their height; prominent lateral ridge on cranium is formed by extension of roof of glenoid fossa; and zygomatic plate is wider and relatively longer than in other species of Notiosorex . There are three unicuspids, and teeth are entirely white with no pigmentation, as in all species of Notiosorex .

Habitat. Wide variety of dry arid habitats, including fallow fields bordered by scattered cacti, thornbush, and mesquite, and shrublands from sea level to elevations of ¢.550 m. Large-eared Gray Shrews can be found in damp microhabitats within dry ecosystems, such as under rocky ledges, rocks, and logs.

Food and Feeding. No information.

Breeding. A pregnant Large-eared Gray Shrew with five embryos was captured in July 1962.

Activity patterns. No information.

Movements, Home range and Social organization. No information.

Status and Conservation. Classified as Least Concern on The IUCN Red List. The Largeeared Gray Shrew has a relatively wide distribution encompassing multiple protected areas and seems common, although it is somewhat threatened by conversion of mesquite areas into agriculturalfields.

Bibliography. Baker et al. (2003), Carraway (2007, 2014e), Carraway & Timm (2000), Castro-Arellano et al. (2016).

Figures

136. Elliot’s Short-tailed Shrew (Blarina hulophaga), 137. Northern Short-tailed Shrew (Blarina brevicaudus), 138. Southern Short-tailed Shrew (Blarina carolinensis), 139. Everglades Short-tailed Shrew (Blarina peninsulae), 140. Sherman’s Short-tailed Shrew (Blarina shermani), 141. Sichuan Short-tailed Shrew (Blarinella quadraticauda), 142. Burmese Short-tailed Shrew (Blarinella wardi), 143. Indochinese Short-tailed Shrew (Blarinella griselda), 144. Chinese Mole Shrew (Anourosorex squamaipes), 145. Taiwanese Mole Shrew (Anowrosorex yamashinai), 146. Assam Mole Shrew (Anowrosorex assamensis), 147. Giant Mole Shrew (Anourosorex schmid), 148. Desert Gray Shrew (Notiosorex crawfordi), 149. Cockrum’s Gray Shrew (Notiosorex cockrumi), 150. Large-eared Gray Shrew (Notiosorex evolis), 151. Villa’s Gray Shrew (Notiosorex villa), 152. Mexican Shrew (Megasorex gigas), 153. Taiwanese Brown-toothed (Shrew Epusoriculusfumidus), 154. Arboreal Brown-toothed Shrew (Episoriculus macrurus), 155. Bailey's Brown-toothed Shrew (Episoriculus baileyi), 156. Long-tailed Brown-toothed Shrew (Episoriculus leucops), 157. Hodgson’s Brown-toothed Shrew (Episoriculus caudatus), 158. Sichuan Brown-toothed Shrew (Episoriculus sacratus), 159. Hidden Brown-toothed Shrew (Episoriculus umbrinus), 160. Nepalese Brown-toothed Shrew (Episoriculus soluensis), 161. Himalayan Shrew (Soriculus nigrescens), 162. De Winton’s Brown-toothed Shrew (Chodsigoa hypsibia), 163. Pygmy Brown-toothed Shrew (Chodsigoa parva), 164. Smith’s Brown-toothed Shrew (Chodsigoa smithii), 165. Salenski’s Brown-toothed Shrew (Chodsigoa salenskii), 166. Dusky Brown-toothed Shrew (Chodsigoa furva), 167. Lesser Taiwanese Brown-toothed Shrew (Chodsigoa sodalis), 168. Van Sung’s Brown-toothed Shrew (Chodsigoa caovansunga), 169. Hoffmann’s Brown-toothed Shrew (Chodsigoa hoffmanni), 170. Lowe’s Brown-toothed Shrew (Chodsigoa parca), 171. Bornean Water Shrew (Chimarrogale phaeura), 172. Sumatran Water Shrew (Chimarrogale sumatrana), 173. Malayan Water Shrew (Chimarrogale hantu), 174. Chinese Water Shrew (Chimarrogale styani), 175. Himalayan Water Shrew (Chimarrogale himalayica), 176. Leander’s Water Shrew (Chimarrogale leander), 177. Japanese Water Shrew (Chimarrogale platycephala), 178. Elegant Water Shrew (Nectogale elegans), 179. Mediterranean Water Shrew (Neomys anomalus), 180. Transcaucasian Water (Shrew Neomysteres), 181. Eurasian Water Shrew (Neomys fodiens)

Distribution. Sinaloa, Nayarit, Jalisco, and Michoacan (W Mexico).