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Open Access PDF - Sven Kullander

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304<br />

ance present in males from 236 mm SL. Maxilla<br />

reaching to below about middle of orbit. Lower<br />

jaw prognathous, articulation below about middle<br />

or posterior margin of orbit. Lateral line discontinuous<br />

in 12, continuous in 26 of 38 specimens.<br />

Dorsal-fin spines 4-6 longest. Soft dorsal fin<br />

rounded, extending to middle of caudal peduncle<br />

in smallest, little longer in large specimens, but<br />

not reaching to caudal-fin base. Soft anal fin<br />

rounded; in smallest specimens reaching to middle<br />

of caudal peduncle, in larger specimens further,<br />

but not attaining caudal-fin base. Caudal-fin<br />

hind margin slightly emarginate in smallest<br />

specimens; in larger specimens truncate with<br />

squared upper corner and rounded lower corner.<br />

Pectoral fin short, rounded in young, becoming<br />

rather acuminate in large specimens; extending<br />

halfway to end of anal-fin base. Pelvic-fin tip<br />

rounded; hind edge straight in young, becoming<br />

slightly concave in large specimens; first and<br />

second rays subequal in extension or second<br />

longest.<br />

Scales present on soft dorsal fin in specimens<br />

over 150 mm SL, from behind last spine to behind<br />

11th ray, in one or two rows close behind preceding<br />

spine or ray; anterior rows reaching to near<br />

tips of rays, posteriorly successively shorter, last<br />

to ~ of ray length; interradial scales also on<br />

membranes between major ray branches, to near<br />

fin margin. Anal fin with heavy basal sheath of<br />

ctenoid scales; interradial scales proximally in<br />

dense sheath, distad narrower; no scales between<br />

ray branches; medially scale sheath slightly<br />

wider than half length of longest rays. Caudal fin<br />

densely scaled from 140 mm SL, but middle<br />

membranes (rays D3-V3) naked along middle,<br />

distally narrow zone of cycloid scales and narrow<br />

naked fin edge. Scales present or absent from base<br />

of pectoral fin. Medial aspect of pelvic fin with<br />

basal layer of scales and double series of cycloid<br />

interradial scales, extending anteriorly to spine<br />

tip, but posteriorly shorter; on lateral side double<br />

interradial series of cycloid scales on first two<br />

membranes to level of spine tips.<br />

Juveniles about 50 mm SL (Fig. 5) elongate,<br />

caudal fin slightly emarginate. Scales absent from<br />

fins except bases of caudal and anal fins. At about<br />

170 mm SL, scale cover on dorsal fin almost fully<br />

developed in some specimens, but specimens up<br />

to almost 200 mm SL may possess only a few<br />

scales; at about 140 mm SL anal fin densely<br />

scaled.<br />

Colouration in preservative. Juveniles about<br />

50 mm SL (Fig. 5) yellowish white on underside<br />

and lower part of head, trunk and caudal peduncle,<br />

up to pectoral axilla level. Dorsum brown<br />

grey, side lighter. Nape and forehead brownish<br />

grey. Cheek silvery dorsally; opercle, preopercle<br />

and subopercle greyish with some silver especially<br />

anteriorly on opercle and subopercle. Pre-<br />

and postorbital dark stripes absent. Pale narrow<br />

stripe obliquely dorsad-rostrad across nape from<br />

gill cleft. Along middle of side dark brown roundish<br />

blotch just posterior to pectoral axilla level,<br />

below upper lateral line section, with faint narrow<br />

dorsal extension; faint brown blotch above vent,<br />

with fainter extensions dorsad and ventrad; dark<br />

brown horizontally extended blotch above soft<br />

anal fin, with fainter extension along caudal peduncle<br />

middle to caudal base blotch. Spinous<br />

dorsal fin smoky, soft fin hyaline with dark spot<br />

on each ray base. Anal fin hyaline, base narrowly<br />

dusky. Pelvic fin hyaline. Caudal fin smoky,<br />

especially medially; roundish midbasal blotch,<br />

slightly extended caudad; large whitish spot<br />

dorsocaudal and ventrocaudal to base blotch.<br />

Short vertical bars develop from 55 mm SL,<br />

bar 1 with first blotch in centre, bar 2 replacing<br />

second blotch. Specimens about 60-70 mm SL<br />

develop large light spots on dorsum, two horizontal<br />

dark bands distally in soft dorsal fin; bars<br />

1a and 2a occasionally present as narrow dark<br />

vertical shades; bar 3 may show through anterior<br />

part of blotch 3; light spots anterior to caudal<br />

blotch still indistinct. Specimens about 70-80 mm<br />

SL with light spots also on side (or only on side),<br />

well-developed vertical bars (1, 1a, 2, 2a, 3; but a<br />

bars 1a and 2a not always apparent); blotch 3<br />

tends to become incorporated in bar 3, caudal<br />

base blotch tends to be isolated from caudal peduncle<br />

pigment and lighter spots around it<br />

brighten.<br />

At about 90-100 mm SL (Fig. 6), no clearly<br />

defined flank blotches remain, soft dorsal fin<br />

light-spotted and isolated caudal base blotch tends<br />

to more dorsal position. Specimens about 130 mm<br />

SL with light spots on dorsum, flank spots whitish<br />

or silvery, caudal blotch ocellated and dorsal<br />

to lateral line, bars 1a and 2a always distinguishable.<br />

Specimens 160 mm SL and larger with ocellated<br />

blotch dorsally in bar 3 (Figs. 7-8) and abdominal<br />

blotches appear posterior to pectoral-fin<br />

base. Light spots on dorsum and side absent in<br />

specimens over 200 mm SL.<br />

<strong>Kullander</strong> & Ferreira: Review of Cichla

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