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<br />characteristics of this subspecies are intermediate between the large bodied albivallis
<br />and grandis subspecies and the small bodied C. b. thermophilus.
<br />Meristics and Morphometrics.- The following values are based on30 C. baileyi (5 male,
<br />25 female) from Ash Spring, 27.2-38.5 mm SL. Typical fin ray numbers: dorsal 10, anal
<br />12, caudal 17, and left pectoral 16 (Table 3). Lateral line scales typically 28 and candal
<br />peduncle circumference scales typically 17 (Table 4). Predorsal length: (J 720.80
<br />(704-729), ~ 705.00 (685-736). Anal to caudal length: (J 357.00 (331-380), ~ 340.28
<br />(315-365). Greatest body depth: (J 355.20 (317-412), ~ 300.04 (259-352). Greatest body
<br />width: (J 226.00 (207-244), ~ 214.68 (192-238). Head length: (J 334.20 (314-357), ~
<br />323.88 (301-357). Head depth: (J 245.00 (234-261), ~ 255.36 (205-252). Head width: (J
<br />235:60(220-244), ~ 225.88 (208-252). Least bony interorbital width: (J 156.80(151-162),
<br />~ 156.48 (141-178). Snout length: (J 84.40 (77-90), ~ 82.16 (79-99). Orbit length: (J
<br />86.80 (76-103), ~ 81.16 (79-92). Depressed dorsal fin length: (J 218.80 (199-231), ~
<br />195.28 (164-223). Depressed anal fin length: (J 220.80 (192-241), ~ 206.08 (180-234).
<br />Middle ray caudal fin length: (J 191.40 (172-210), ~ 191.72 (170-208). The following
<br />vertebral counts are based on 20 specimens (UMMZ MI25006), with frequency of each
<br />count given in parenthesis; precaudal: 11(5), 12(15), avg.ll.8; caudal: 1,5(1),16(6),17(13),
<br />avg. 16.6; total: 27(5),28(.3),29(12), avg. 28.4.
<br />Etymology.-Gilbert (1893) named the fish in honor of V. Bailey, one of the collectors
<br />of the type specimens.
<br />
<br />Crenichthys b. moapae, n. subsp. Moapa White River springfish (Fig. 11).
<br />Diagnosis.- This subspecies is separable from C. b. albivallis in having a longer head
<br />and greater least bony interorbital width (Figs. 2, 3). Crenichthys b. moapae differs from
<br />C. b. thermophilus in possessing a longer anal to caudal length (Fig. 4). Crenichthys b.
<br />moapae can be distinguished from C. b. grandis by coloration. The deep green middorsal
<br />stripe and the bright blue bands to either side are less prominent in C. b. moapae than in
<br />C. b. grandis. The yellow color on males of C. b. moapae is reduced, being displayed only
<br />as orange-yellow pectoral fin bases and occasionally in parts of the caudal peduncle. The
<br />belly and lower parts of the head are lemon yellow on males of C. b. grandis. Crenichthys
<br />b. moapae is separable from C. b. baileyi in the former having more fin rays (Table 3).
<br />Type Material.-Holotype, male (UMMZ 203338), 47.8 mm SL and allotype (UMMZ
<br />203339),41.9 mm; collected 26 Feb. 1967 by M. Belcher from Cardy Lamb Spring along
<br />with 61 paratopotypes ASU-5231 (16.8-56.8 mm).
<br />Distribution.-Crenichthys b. moapae inhabits headwater springs of the Moapa River
<br />(T 14 S, R 65 E) in Clark Co., Nevada. An apparently introduced population exists in a
<br />spring near Anderson Dairy Farm along the Moapa River (T 15 S, R 66 E, See 3). The type
<br />locality, Cardy Lamb Spring, is located in the SW1f4 of section 9 (T 14 S, R 65 E).
<br />
<br />Species Associates and Status.-Several native species (Rhinichthys osculus moapae,
<br />Moapa coriacea), the local form of Gila robusta, and Crenichthys baileyi moapae inhabit
<br />headwater areas of the Moapa River (Cross 1976, Williams 1978). Exotic species
<br />(Gambusia affinis, Poecilia mexicana, and Pimephales promelas) also inhabit Moapa
<br />River headwater areas. Crenichthys b. moapae is still abundant in many headwater
<br />springs of the Moapa River.
<br />Meristics and Morphometrics.- The following values are based on 30 Crenichthys
<br />baileyi (10 male, 20 female) from Cardy Lamb Spring, 29.2-57.1 mm SL. Typical fin ray
<br />numbers: dorsal 11, anal 13, caudal 18, and left pectoral 17 (Table 3). Lateral line scales
<br />typically 28 and caudal peduncle circumference scales typically 17 (Table 4). Predorsal
<br />length: (J 709.00 (687-729), ~ 711.05 (682-734). Anal to caudal length: (J .347.36
<br />(329-363), ~ 337.21 (316-359). Greatest body depth: (J 330.55 (303-360), ~ 30.3.84
<br />(276-335). Greatest body width: (J 204.82 (191-228), ~ 211.68 (188-252). Head length:
<br />(J 305.64 (292-339), ~ 301.00 (269-331). Head depth: (J 253.27 (231-284), ~ 241.16
<br />
<br />497
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