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Cichliformes (Cichlids, convict blennies) >
Cichlidae (Cichlids) > Ptychochrominae
Etymology: Ptychochromis: Greek, ptyx, = fold + Greek, chromis = a fish, perhaps a perch (Ref. 45335); ernestmagnusi: Named in honor of Mr. Ernest Magnus of Berlin, Germany, and New York City, at the request of the family of Dr. Rudolph G. Arndt, whose support of ichthyological exploration and research at the American Museum of Natural History is gratefully acknowledged (Ref. 83427).
Eponymy: Ernest Magnus (1908–1983) was honoured at the request of the family of Rudolf G Arndt, a German-American marine biologist and ichthyologist, whose ‘generous gift’ supported the authors’ research (Magnus was Arndt’s uncle and was instrumental in help [...] (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
Ekologi
; air tawar bentopelagis. Tropical
Africa: Mananara (du nord) River in northeastern Madagascar (Ref. 83427).
Size / Weight / umur
Maturity: Lm ? range ? - ? cm
Max length : 14.7 cm SL jantan/; (Ref. 83427)
deskripsi pendek
Kunci identifiaksi (pengenalan) | Morfologi | Morfometrik
Duri punggung (Keseluruhan (total)) : 12 - 13; duri punggung lunak (Keseluruhan (total)) : 11 - 13; Duri dubur: 3; Sirip dubur lunak: 7 - 9; vertebrata, bertulang belakang: 27 - 28. Diagnosis: Ptychochromis ernestmagnusi is a Ptychochromis exhibiting the eastern-type palatine morphology and is further distinguished from all congeners except P. grandidieri, P. loisellei, P. makira and P. curvidens by an anterior displacement of the first supraneural such that it overlies the dorsoposterior margin of the supraoccipital (Ref. 83427). Among eastern group Ptychochromis, P. makira shares with P. ernestmagnusi the possession of supraneurals with a characteristically flattened dorsal profile, which is interpreted here as a synapomorphy uniting these two geographically proximate species; also shared with P. makira is the presence of strong, paired, lateral barring as a prominent component of pigmentation patterning; however, P. makira can be distinguished by distinctively V-shaped lateral flank bars, whereas in P. ernestmagnusi the bars are oriented vertically; Ptychochromis ernestmagnusi is further distinguished from P. makira by conspicious iridescent spangling on the flank and dorsal fin near its base, dusky grayish-green base colouration vs. whitish, four lachrymal laterosensory foramina vs. three, and a total of seven infraorbital bones vs. six (Ref. 83427).
Found in a region which is characterized by humid, lowland rainforest; with a steep overall profile, and a generally rocky to sandy substrate (Ref. 83427).
Life cycle and mating behavior
Kematangan | Reproduksi, perkembang biakan | Pemijahan | telur-telur | Fecundity | Larva
Sparks, J.S. and M.L.J. Stiassny, 2010. A new species of Ptychochromis from northeastern Madagascar (Teleostei: Cichlidae), with an updated phylogeny and revised diagnosis for the genus. Zootaxa 2341:33-51. (Ref. 83427)
Status IUCN Red List (Ref. 130435: Version 2024-2)
ancaman kepada manusia
Harmless
penggunaan manusia
Alat, peralatan
laporan khas
muat turun XML
Sumber internet
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5010 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
Trophic level (Ref.
69278): 3.4 ±0.5 se; based on size and trophs of closest relatives
Daya lenting (Ref.
120179): Tinggi, Waktu penggandaan populasi minimum kurang dari 15 bulan (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
