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<br />Species Account - Catostomus latipinnis
<br />
<br />
<br />Fig. 63. Catostomus latipinnis adult (@ Joseph R.
<br />Tomelleri).
<br />
<br />Adult Description: Back without conspicuous predorsal keel.
<br />Caudal peduncle slender, typically <;6% SL. Mouth inferior,
<br />moderate in size; no hard, prominent, cartilaginous ridges along
<br />inside of jaws. Lips large, fleshy, profusely papillose, without
<br />notches at comers; lower lip with a deep median cleft allowing
<br />one or no rows of papillae to span 1he two lobes; lobes extend
<br />beyond vertical from nostrils, often to eyes. Dorsal fin large
<br />and falcate. Scales small. Fontanelle present. TL usually
<br />30-40 cm, up to 60 cm. (Also, Table 21.)
<br />
<br />Reproduction: Non-guarding, open-substrate lithophil.
<br />April to August, mostly May to early July, 6 to at least 130
<br />C (possibly also early fall in Lower Colorado River Basin).
<br />Usually over gravel-cobble bars or riffles, or coarse gravel
<br />under <1.2 m of water. Mayor may not migrate to spawn-
<br />ing grounds. Water-hardened eggs 3.8-3.9 mm diameter,
<br />demersal, initially adhesive.
<br />
<br />Young: Larvae, predominately mesolarvae, drift, mostly
<br />at night. Young typically occupy slow to quiet and shallow
<br />waters along shore and in backwaters or pools; often in the
<br />marginal areas of swift-flowing streams; not common in
<br />sluggish, very warm areas.
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<br />......-.-.-.--_1 ;--.---.-.\--.-----.-.--.
<br />MEXICO ;-.-....l '''\
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<br />
<br />Fig. 64. Recent distribution of Catostomus latipinnis in
<br />Colorado River Basin.
<br />
<br />Table 21. Selected juvenile and adult meristics for Catostomus latipinnis. P = principal rays; R = rudimentary rays; D =
<br />dorsal; V = ventral. Scales are lateral series or line when complete. Four added to vertebral count for Weberian complex. Gill
<br />rakers for exterior row of first arch, specimens >70 mm SL. Mean or modal values underlined if known and noteworthy; rare
<br />or questionable extremes in parentheses.
<br />
<br />Character Original Literature Character Original
<br />Dorsal Fin Rays - P: (11)12-13(14) (10)11-12-13-14(15) Dorsal Fin Rays - R: 3-:1:
<br />Anal Fin Rays - P: 7 7(8) Anal Fin Rays - R: (1g-3
<br />Caudal Fin Rays - P: 18 Caudal Fin Rays - RD: 10-11-14
<br />Pectoral Fin Rays: 15-16-17 18 Caudal Fin Rays - RV: 9-10-11
<br />Pelvic Fin Rays: (9) I 0(11) 9-lQ-ll Lateral Scales:
<br />Vertebrae: 47-50 Gill Rakers:
<br />
<br />Literature
<br />
<br />89-98-105-116(-120)
<br />25-27-31-32(-35)
<br />
<br />Event or
<br />Structure
<br />
<br />Table 22. Size at apparent onset of selected developmental events for Catostomus latipinnis, as observed under low power
<br />magnification. P = principal rays; R = rudimentary rays. Scales are lateral series. Rare or questionable extremes in parentheses.
<br />
<br />Onset or Formation
<br />mm SL mm TL
<br />
<br />Fin Rays
<br />or Scales
<br />
<br />First Formed
<br />mm SL mm TL
<br />
<br />Last Formed
<br />mm SL mm TL
<br />
<br />Hatched: (8-) 10-11 (8-) 1O-1l Dorsal - P: 15 16 17 -18 20-22
<br />Eyes Pigmented: (9)10 or * (9)10 or * Anal- P: 17 18-19 19-20(21) 23-24
<br />Yolk Assimilated: (14)15(16) (15)16-17 Caudal- P: 13 13(14) (14)15(16) (15)16(17)
<br />Finfold Absorbed: 23-24(25) 28-29(31) Caudal - R: (15-) 17 (16-) 18(19) 23 28-29
<br />Pectoral Fin Buds: (9) or * (9) or * Pectoral: 17 18-19 19-22 22-27
<br />Pelvic Fin Buds: (15)16(17) 17-18 Pelvic: 17-18 19-20 23 (28)29
<br />* before hatching Scales: (36)37-39 (44)45-49 39-42 48-51
<br />
<br />References: Baird and Girard 1854, Baxter and Stone 1995, Behnke et a1. 1982, Beckman 1952, Bezzerides and Bestgen 2002,
<br />Carlson et a1. 1979, Douglas and Douglas 2000, Holden 1973, Hubbs and Hubbs 1947, Hubbs and Miller 1953, Hubbs et a1. 1943,
<br />Jordan and Evermann 1896, Joseph et al. 1977, La Rivers 1962, Lee et a1. 1980, McAda 1977, Miller 1952, Minckley 1973, Prewitt
<br />1977, Sigler and Miller 1963, Sublette et a1. 1990, Tyus et al. 1982, Wheeler 1997, Woodling 1985. Personal communication:
<br />2004-G. A. Mueller.
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