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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).
Environment: milieu / climate zone / depth range / distribution range
Sinh thái học
; Nước ngọt Sống nổi và đáy. Tropical; 13°S - 14°S, 34°E - 35°E
Africa: southern Lake Malawi in Malawi (Ref. 87930).
Bộ gần gũi / Khối lượng (Trọng lượng) / Age
Maturity: Lm ? range ? - ? cm
Max length : 12.8 cm SL con đực/không giới tính; (Ref. 87930)
Short description
Khóa để định loại | Hình thái học | Sinh trắc học
Các tia vây lưng cứng (tổng cộng) : 15 - 16; Các vây lưng mềm (tổng cộng) : 10 - 11; Tia cứng vây hậu môn: 3; Tia mềm vây hậu môn: 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).
Life cycle and mating behavior
Maturities | Sự tái sinh sản | Spawnings | Egg(s) | Fecundities | Ấu trùng
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. 130435)
Threat to humans
Harmless
Human uses
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01514 (0.00700 - 0.03275), b=2.97 (2.80 - 3.14), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Mức dinh dưỡng (Ref.
69278): 4.0 ±0.7 se; based on size and trophs of closest relatives
Thích nghi nhanh (Ref.
120179): Chiêù cao, thời gian nhân đôi của chủng quần tối thiểu là dưới 15 tháng (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
