Archocentrus
Creators: name: Juan J. Schmitter-Soto
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Perciformes
Cichlidae
Archocentrus

description: Key to Archocentrus and allied genera
1a Maxilla very protractile; ascending process of premaxilla extending beyond orbit, contained ininterorbital groove; caudal fin profile strongly rounded .............................................................. Caquetaia
1b Maxilla and premaxilla not as above; caudal fin profile, if rounded, not as strongly as above ......... 2
2a(1b) Caudal fin emarginate ................................................................................................... Hypsophrys (8)
2b Caudal fin rounded or (sub)truncate ................................................................................................. ..3
3a(2b) Genital papilla long, contours mostly parallel, as seen from rostral face, terminal notch rounded; upper symphysial teeth abruptly larger than adjacent teeth; lower symphysial teeth smaller than adjacent teeth, which are enlarged; frenum on lower lip absent ....................................... Parachromis
3b Genital papilla not as above; outer teeth on upper jaw gradually increasing in size anteriorly (symphysial teeth abruptly larger in Rocio, Amatitlania, and some Cryptoheros); frenum on lower lip present or absent ............................................................................................................................. 4
4a(3b) Frenum on lower lip absent; total gill-rakers on first arch 14-20; pharyngeal plate longer than wide. ......................................................................................................................................... Amphilophus
4b Frenum present in lower lip or absent; total gill-rakers on first arch 7-15; pharyngeal plate about as wide as long, or wider.........................................................................................................................5
5a(4b) Lateral stripe extending from snout to a blotch on mid-body; eight bars on sides; ocellated spot on caudal fin, dorsal to lateral line; lower jaw usually extending beyond upper jaw.................. Rocio (9)
5b Lateral stripe absent; usually 6-7 bars on side of body; caudal blotch, if present, not ocellated, not entirely dorsal to lateral line, or not entirely on fin; mouth usually terminal......................................6
6a(5b) First bar on side of body Y-shaped, caudal arm discontinuous; caudal blotch on fin (sometimes obsolete) .......................................................................................................................... Amatitlania (11)
6b First bar on side of body I- or V-shaped (may be Y-shaped in some Cryptoheros, but caudal arm continuous); caudal blotch usually on peduncle (may lie on fin in some Cryptoheros)......................7
7a(6b) A. IX-XII; genital papilla oval, in females opening strongly crenulated; two interorbital bands......... .................................................................................................................................. Archocentrus (14)
7b A. VI-IX; genital papilla not as above; no interorbital bands................................... Cryptoheros (16)
description: Published as part of 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., pp. 1-78 in Zootaxa 1603 on pages 7-8