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Cichliformes (Cichlids, convict blennies) >
Cichlidae (Cichlids) > Pseudocrenilabrinae
Etymology: Stigmatochromis: Greek, stigma = mark, signal + Greek, chromis = a fish, perhaps a perch (Ref. 45335); macrorhynchos: Specific epithet a noun in apposition from Greek makros meaning 'long' and rhynchos meaning 'snout', referring to the elongated snout of this species (Ref. 87930).
Environnement : milieu / zone climatique / profondeur / gamme de distribution
Écologie
; eau douce benthopélagique. Tropical; 13°S - 14°S, 34°E - 35°E
Africa: southern Lake Malawi in Malawi (Ref. 87930).
Taille / Poids / Âge
Maturité: Lm ?  range ? - ? cm
Max length : 12.8 cm SL mâle / non sexé; (Ref. 87930)
Description synthétique
Clés d'identification | Morphologie | Morphométrie
Épines dorsales (Total) : 15 - 16; Rayons mous dorsaux (Total) : 10 - 11; Épines anales: 3; Rayons mous anaux: 8 - 9. Diagnosis: The presence of supra-pectoral and supra-anal spots, which do not extend to the base of the dorsal fin, combined with a snout length longer than the post-orbital head length distinguishes this species as a member of Stigmatochromis (Ref. 87930). It is further diagnosed by the presence of mostly unicuspid teeth in the outer rows of the lower jaws; Stigmatochromis macrorhynchos has a narrower interorbital width than S. melanchros, 13.7–16.2% of head length vs. 19.3–20.5%, and a shorter snout to pelvic-fin origin than S. melanchros and S. modestus, 38.4-40.3% of standard length vs. 42.2-44.6% and 42.2-46.9% respectively; the distance between the dorsal fin origin and the posterior anal fin insertion is shorter in S. macrorhynchos, 51.2–51.8% of standard length, than in all other Stigmatochromis species, 53.5–57.2%; the distance between the anterior dorsal fin to pelvic-fin origin of S. macrorhynchos, 27.7–30.0% of standard length, is shorter than in S. modestus, 30.3–33.8%, S. woodi, 31.9–38.1%, and S. melanchros, 35.7–36.1%, and longer than in S. pholidophorus, 26.8%, and S. pleurospilus, 27.5%; the snout length of S. macrorhynchos, 38.0–41.2% of head length, is longer than in S. modestus, 33.5–37.4%, and S. pholidophorus, 37.1%; the smaller head depth of S. macrorhynchos, 59.8–63.6% of head length, further distinguishes it from S. woodi, 64.1–75.8%, and S. melanchros, 67.8–76.8% (Ref. 87930).
Body shape (shape guide): fusiform / normal.
Cycle de vie et comportement reproducteur
Maturité | Reproduction | Frai | Œufs | Fécondité | Larves
Stauffer, J.R. Jr., R.M. Cleaver-Yoder and A.F. Konings, 2011. Two new species of Stigmatochromis (Teleostei: Cichlidae) from Lake Malawi, Africa. Proc. Biol. Soc. Wash. 124(3): 212-222. (Ref. 87930)
Statut dans la liste rouge de l'IUCN (Ref. 130435: Version 2025-2 (Global))
Menace pour l'homme
Harmless
Utilisations par l'homme
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Estimations basées sur des modèles
Indice de diversité phylogénétique (Réf.
82804): PD
50 = 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01445 (0.00671 - 0.03113), b=2.99 (2.82 - 3.16), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Niveau trophique (Réf.
69278): 4.0 ±0.7 se; based on size and trophs of closest relatives
Résilience (Réf.
120179): Haut, temps minimum de doublement de population inférieur à 15 mois (Preliminary K or Fecundity.).
Vulnérabilité de la pêche (Ref.
59153): Low vulnerability (10 of 100).
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