Auchenionchus crinitus (Jenyns 1841)

Chile Central

Auchenionchus crinitus (Jenyns)

Clinus crinitus Jenyns, 1842:90 [Coquimbo, Chile; holotype, BMNH 1917.7.14.55, from the Beagle].

Auchenionchus chalaco DeBuen, 1962:70 [Antofagasta; holotype, EBM 10.022, apparently lost].

DESCRIPTION.—Counts summarized in Table 3. Salient characters are presented in the key. Dorsal fin XXVI,11–12; total dorsal-fin elements 37–38; anal fin II,23–24; pectoral fin 13; pelvic fin I,3; caudal fin 13; lateral-line scales 58–61; vertebrae 13 + 29–30 = 32–33 (7 specimens).

Morphometric characters of eleven specimens examined: SL 25.2–173.0 mm; head length 25.8–34.6; head depth 18.2–24.2; head width 13.8–18.3; upper-jaw length 11.8–15.4; eye diameter 5.8–10.2; snout length 6.3–10.2; interorbital width 3.2–5.9; predorsal length 20.8–28.9; preanal length 46.6–57.3; caudal-peduncle depth 7.1–10.9; caudal-peduncle length 11.4–18.3; first dorsal-fin spine length 5.2–9.0; fourth dorsal-fin spine length 6.9–9.8.

Orbital cirri: 4–8 small cirri, each separate and simple, none enlarged; cirri not well developed in specimens below 30 mm; nape cirri: palmate with 6–13 branches at distal edge (usually 9–10); nasal cirri: 4–10 branches, arborescent or palmate; teeth: single outer row of about 20 enlarged teeth on premaxillary and dentary, patches of small teeth internal to enlarged outer row, patches separated medially by narrow toothless grove; 5–18 teeth on each palatine; vomer covered with small teeth. Membrane at tips of dorsal- and anal-fin rays forms free cirrus-like projections. Anal fin not bound to caudal peduncle. Scales and pores as described for A. microcirrhis.

Color in alcohol: The following is a description of the coloration of the holotype (probably ♀) prepared for us by M.K. Oliver. It is followed by a description of our largest male specimen and significant variations. Holotype (143 mm SL). Ground color brown (lighter in patches where scales are missing), slightly darker on dorsal half of body; operculum with 5 distinct dark brown spots, more or less circular, somewhat smaller in size than pupil; 8–10 similar spots on preopercle and cheek, most following boundary between anterior edge of preopercle and cheek; spots becoming progressively smaller and lighter anteroventrally; lips brown with darker brown rounded spots; branchiostegal membrane light brown with distinct rounded darker brown spots, spots lighter ventromedially; body without vertical bars, with scattered dark brown, circular, pupil-sized spots, almost evenly distributed (and equally dark) dorsoventrally and antero-posteriorly, but lighter on belly; dark brown pupil-sized spots on basal one-third of skin of 17th dorsal-fin spine; similar but lighter spots elsewhere on spinous dorsal fin at various distances from fin base; three vague, dark brown spots, somewhat larger than pupil, in row on soft dorsal fin, two-fifths distance toward ends of rays; caudal fin uniformly dark brown, with darker spot size of eye covering bases of central caudal-fin rays; anal fin brown, with about 7 dark brown circular spots, somewhat larger than pupil, evenly spaced along posterior two-thirds of fin, spots becoming progressively darker and more distinct posteriorly; pectoral fins uniform light brown; pelvic fins brown, innermost ray abruptly darker brown; all cirri dark brown.

SIO 65–678, male, 173 mm SL. Ground color brown to tan, darker on dorsal half of head and body; no distinct markings on head; except lips and chin spotted anteriorly; opercle and branchiostegals unmarked. About 6–7 wide, dark brown bands on dorsal-fin base; bands coalescing at about lateral line, separated dorsally by narrow, short, unpigmented blotches; bands continuing anterodorsally across spinous dorsal fin; body below lateral line indistinctly mottled, no spots present; soft dorsal fin marked with 2 large brown spots on proximal half, each covering 3–4 rays; caudal fin with series of 3–5 large brown spots on distal half and indistinct spotting along proximal edge; anal fin light brown proximally with dark brown to black longitudinal stripe just distal to middle of fin, distal edge unmarked; pectoral fin brown with bands present on proximal half; pelvic fin brown; inner pelvic ray dark brown to black; no markings on belly; all cirri dark brown.

Smaller specimens exhibit both patterns described above but markings more distinct, especially on caudal fin, which bears distinct band, almost at distal fin edge, and somewhat diffuse spot covering central rays near bases. Spots on soft dorsal fin also distinct. Large spots sometimes present on cheek, and scattering of obvious, dark brown spots present on body below lateral line, but well above anal-fin base and in line with caudal-fin spots. One specimen (♂, 147 mm SL) and our only Peruvian specimen (♂, 130 mm SL) with bands on dorsal-fin base continuing vertically almost to anal-fin base. In specimens smaller than 60 mm SL, head spotting sometimes more dispersed, continuing onto branchiostegal membrane, pelvic- and pectoral-fin bases, and body posterior to pectoral fin. Two of our four smallest specimens (24.1 and 28.0 mm SL) have 2 well-developed white bands; anterior band forming rectangular area between preopercle (anteriorly) and middle of pectoral fin (posteriorly), terminating ventrally at level of lowermost pectoral-fin ray; posterior band at caudal fin base anterior to proximal stripe. This last-described coloration is also mentioned by DeBuen (1962:58, figure 13), for a single specimen (37 mm TL). The smaller of these 2 specimens additionally has a midlongitudinal white band extending from tip of snout to dorsal-fin origin. A third small specimen (26.5 mm SL) only vaguely exhibits the vertical body bands, while no white markings are evident on a fourth (28.5 mm SL) specimen.

Auchenionchus crinitus is a species of labrisomid blenny endemic to the Pacific waters off of Chile.

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Auchenionchus crinitus Auchenionchus generoko animalia da. Arrainen barruko Labrisomidae familian sailkatzen da.