Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Perciformes
(Perch-likes) > Cichlidae
(Cichlids) > Pseudocrenilabrinae
Etymology: Stigmatochromis: Greek, stigma = mark, signal + Greek, chromis = a fish, perhaps a perch (Ref. 45335); macrorhynchos: species (Ref. 87930).
Environment / Climate / Range
Freshwater; benthopelagic; depth range 108 - ? m (Ref. 87930). Tropical, preferred ?; 13°S - 14°S, 34°E - 35°E
Africa: endemic to Lake Malawi, known from Domwe Island and Mumbo Island (Ref. 87930).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 12.8 cm SL male/unsexed; (Ref. 87930)
Morphology | Morphometrics
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. 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 vs. 19.3–20.5% HL) and a shorter snout to pelvic-fin origin (38.4– 40.3% SL) than S. melanchros (42.2–44.6% SL) and S. modestus (42.2–46.9% SL). The distance between the dorsal fin origin and the posterior anal fin insertion is shorter in S. macrorhynchos (51.2–51.8% SL) than in all other Stigmatochromis species (53.5–57.2% SL). The distance between the anterior dorsal fin to pelvic-fin origin of S. macrorhynchos (27.7–30.0% SL) is shorter than in S. modestus (30.3–33.8% SL), S. woodi (31.9–38.1% SL) and S. melanchros (35.7–36.1), and longer than in S. pholidophorus (26.8% SL) and S. pleurospilus (27.5% SL). The snout length of S. macrorhynchos (38.0–41.2% HL) is longer than in S. modestus (33.5–37.4% HL) and S. pholidophorus (37.1% HL). The smaller head depth of S. macrorhynchos (59.8–63.6% HL) further distinguishes it from S. woodi (64.1–75.8% HL) and S. melanchros (67.8–76.8% HL) (Ref. 87930).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
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)
IUCN Red List Status (Ref. 109396)
CITES (Ref. 94142)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01479 (0.00693 - 0.03157), b=2.97 (2.80 - 3.14), based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 4.0 ±0.7 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low vulnerability (17 of 100) .