Cryptoheros nanoluteus (Allgayer, 1994)

Juan J. Schmitter-Soto, 2007, A systematic revision of the genus Archocentrus (Perciformes: Cichlidae), with the description of two new genera and six new species., Zootaxa 1603, pp. 1-78: 46-47

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Cryptoheros nanoluteus (Allgayer, 1994)


Cryptoheros nanoluteus (Allgayer, 1994) 

Figures 5, 15

Archocentrus nanoluteus Allgayer, 1994  ZBK  : 9 (original description).

Cryptoheros nanoluteus  , Allgayer 2001: 16 ( new combination).

Holotype. MNHN 1993-0260, 64 mm SL (Fig. 15), J.-C. Nourissat, Feb. 3, 1993. Rio Guarumo, “Boca del Toro” (Bocas del Toro), Chiriqui Grande , Panama. 

Paratypes. MNHN 1993-0261-0263 (3, 52-62 mm SL). 

Diagnosis. Unique autapomorphies (Schmitter-Soto, in press): one spot on opercle, not at angle; first bar on sides of body, Y- or V-shaped, arms continuous and never coalesced, rostral arm curved forward. Further distinguished from all other species of subgenus Bussingius  by intense yellow, in life, on breast, fins and throat (vs. yellowish or differently coloured); caudal blotch diffuse and entirely confined to caudal fin (vs. caudal blotch at least partly on peduncle); sum of dorsal and anal-fin spines 28 (vs. 27 or fewer).

Description. D. XVII-XVIII,10-11; A. VIII-IX,8-9. Gill rakers on lower limb of first arch 6-7; gill rakers digitiform, serrated. Scales strongly ctenoid. Predorsal scales 14; pored lateral-line scales (not counting scales overlapping between the two segments of the lateral line) 28-29; scales from lateral line to base of first dorsal-fin ray 2.5; circumpeduncular scales 16-17 (further meristic data appear in Table 3).

Largest specimen examined and maximum known length, 64 mm SL. Body moderately deep, 44-52% of SL; head length 29-35% of SL; orbital diameter 27-32% of head length (further morphometric data appear in Table 4). Head profile concave above orbits, convex on nape. Teeth moderately embedded; upper symphysial teeth spatulate, sides concave, tip triangular, labiolingually compressed. Upper symphysial teeth not abruptly larger, almost subequal to adjacent teeth; lower symphysial teeth subequal to adjacent teeth. Lips not medially narrow; lower lip not tapering at corner, even sometimes expanded, squarish.

Pectoral and pelvic fins always reaching caudad beyond 4th anal-fin spine. Filamentous rays of dorsal fin to distal third of caudal fin. One or two pored scales continuing lateral line on caudal fin, Subsidiary pores on caudal fin, usually two on each scale. Dorsal- and anal-fin interradial scale rows, imbricated (i.e. with supplementary scales), up to 8 scales long.

Genital papilla rather oval but wider at base, pigmented on base and sides.

Suborbital streak, if visible, anteriorly sharp; one opercular spot. Eyes greenish, bluish, greyish. Longitudinal stripe incomplete, reaching just to base of pectoral fin. Bars on side of body intensified medially, rather as series of spots, with a second series dorsally, darker posteriorly; 1st bar Y- or V-shaped, arms never coalescent, intensified medially and dorsally, rostral arm inclined on head; medial intensification of 3rd bar, discernible as an oval spot; 4th bar weakest. Bars not extending onto dorsal fin. Ocellus on dorsal fin of mature females starting on on 8th or 9th spine, ending between 10th and 14th spine. Dorsal and anal fins immaculate, just bases darkened. About nine rows of light spots on sides, smaller than scales; breast, dorsal and anal fins and isthmus intensely yellow in life. Axil of pectoral fin lighter than breast; base of pectoral fin whitish. Caudal blotch on fin, two-thirds above lateral line, coalescent with last bar.

Distribution. Ríos Guarumo and Pejebobo, Atlantic Panama (Fig. 5).

Remarks. See Remarks for Cr. altoflavus  ZBK  . Allgayer (1994) considered it “assez proche de l’ espèce A. nigrofasciatus  .