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Notiosorex tataticuli

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Ticul's Gray Shrew
(Notiosorex tataticuli)
Range
Taxonomic classification
Order:Eulipotyphla
Suborder:Erinaceota
Family:Soricidae
Subfamily:Soricinae
Tribe:Notiosoricini
Genus:Notiosorex
Binomial details
Notiosorex tataticuli Camargo & Álvarez-Castañeda, 2020

Recognized as a separate species by Camargo & Álvarez-Castañeda (2020), based on populations previously attributed to Notiosorex crawfordi.

Description

From Camargo & Álvarez-Castañeda (2020): "Notiosorex tataticuli is small, gray coloration in different tones; scent gland on flanks; large ears; tail short, less than one-third of total length. Dorsal coloration is light gray (7.5YR 7/1), being slightly darker gray (7.5YR 5/1) in individuals collected in Sierra de La Laguna; ventral coloration ranges from pinkish gray (7.5YR 6/2) to pinkish white (7.5YR 8/2); tail is dark brown (10YR 2/1) to brown (7.5YR 4/2)."

Notiosorex tataticuli observed in Cabrillo National Monument, California, by sidesplotch.

External measurements

Length measurements are in millimeters (mm) and weight measurements are in grams (g), unless stated otherwise. If available, the sample size (n=) is provided. If a range is not provided and n= is not given, then the listed measurement represents an average.

Part of range Reference Total length Tail length Hindfoot length Ear length Mass
California Jameson & Peeters (2004) 81–90 24–26 9–11 8–9 3–5


Skull

Only three unicuspids in upper jaw; whereas Sorex have four or five.

From Camargo & Álvarez-Castañeda (2020): "The teeth are proportionally smaller than in the other species of Notiosorex, in particular the lower molars; the dentary is shallow. Notiosorex tataticuli has the largest mean condylobasal length within the genus Notiosorex." Additionally, "Anterior teeth are slightly pigmented in labial view; there are three upper unicuspid teeth, and the socket of the first lower incisor extends below the paraconid first molar. From the lingual view, both upper molars are nonpigmented."

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Similar species

From Camargo & Álvarez-Castañeda (2020): "Notiosorex tataticuli has a distribution that is allopatric with respect to all remaining species of Notiosorex. It can be differentiated from N. crawfordi only by DNA sequence data; the uncorrected patristic distances between the two taxa are: 15.58% in Cytb, 13.13% in Co1, 11.26% in Co3, and 5.27% in Fgb. We found no morphological characters that could be used to differentiate between these two species. Craniodental measurements of N. tataticuli in general are smaller. Notiosorex tataticuli can be distinguished from N. cockrumi by genetic characters. It differs from N. cockrumi by: 14.16% in Cytb; 7.64% in Co1, 10.97% in Co3, and 5.34% in Fgb. We found no morphological characters that could be used to differentiate between these two species. The craniodental measurements of N. tataticuli in general are smaller."

References

Camargo I, Álvarez-Castañeda ST. 2020. A new species and three subspecies of the desert shrew (Notiosorex) from the Baja California peninsula and California. Journal of Mammalogy 101(3):pp.872-886.

Jameson EW, Peeters HJ. 2004. Mammals of California (No. 66). Berkeley (CA, USA): University of California Press.

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