7950

• UCREFRP Catalog Number: 7950
• Author: Williams, J. E. and G. R. Wilde
• Title: Taxonomic Status And Morphology Of Isolated Populations Of The White River Springfish,
• USFW Year: 1981
• Copyright Material: YES

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ANAL TO CAUDAL LENGTHISTANDARD LENGTH
Fig. 4. Comparison of anal to caudal length in populations of Crenichthys baileyi. See text
for explanation of figure.

Crenichthys baileyi thennophilus, n. subsp. Mormon White River springfish (fig. 8).
Diagnosis.- This subspecies differs from other C. baileyi subspecies in having the most posteriorly
positioned median fins, resulting in a shorter anal to caudal length (Fig. 4). Crenichthys b.
thennophilus also is characterized by a long snout (Fig. 5).
Type Material.-Holotype, male (UMMZ 203334), 32.4 mm SL collected 4 Apr. 1965 by J. E.
Deacon from Mormon Spring along with 6 paratopotypes, UNLV-124 (15.8-29.8 mm). Allotype
(UMMZ 203335), 31.6 mm; collected 29 Jan. 1965 by J. E. Deacon from Mormon Spring along with
12 paratopotypes, UNL V -123 (19.1-33.6 mm). Other paratopotypes collected from Mormon Spring
as follows: 4, UNLV-121 (16.8-32.1 mm); 6, UNLV-122 (18.5-30.0).
Distribution.-Crenichthys baileyi thermophilus is restricted to three springs in Nye Co., Nevada.
The type locality is Mormon Spring (T 9 N, R 61 E, See 32). This subspecies also occurs in Hot Creek
Spring (T 6 N, R 61 E, See 18) and Moon River Spring (T 6 N, R 60 E, See 25). On rare occasions, C.
baileyi is collected in Adams-McGill Reservoir. These fish apparently are washed down from Hot
Creek and/or Moon River Springs during floods or are transported by fishermen. No viable
population of springfish exist in Adams-McGill Reservoir.

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