分類 / Names
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Cichliformes (Cichlids, convict blennies) >
Cichlidae (Cichlids) > Geophaginae
Etymology: Dicrossus: Greek, di = two + Greek, krossoi = tassel (Ref. 45335); foirni: Named for Federacão das Organizações Indígenas do Rio Negro, officially abbreviated as FOIRN. This acknowledges FOIRN for giving repeatedly permission to travel on the tribal land of the village communities of different indigenous groups in the middle and upper Rio Negro and its affluent rivers, as well as for carrying out observations on wildlife, especially insects and fish, in these areas. This permitted the observation and collection of this new species..
Environment: milieu / climate zone / depth range / distribution range
生態学
; 新鮮な水 底生の漂泳性. Tropical
South America: Rio Negro, Amazon drainage in Brazil.
サイズ / 重さ / 年齢
Maturity: Lm ? range ? - ? cm
Max length : 7.1 cm SL オス/雌雄の選別がない; (Ref. 85095); 4.5 cm SL (female)
簡単な記述
検索表 | 形態学 | 形態計測学
背面の脊椎 (合計) : 15 - 16; 背鰭 (合計) : 6 - 7; 肛門の骨: 3; 臀鰭: 6 - 7. Can be distinguished readily by having three rows of round to vertical-ovoid, alternating dark grey to blackish, double or triple spots on the sides of the body; adult males with a black spot on the dorsum and basal part of the dorsal fin at the position of hard rays 7 to 8, and a pointed rhombic caudal fin. Exhibits pronounced sexual size and color dimorphism (Ref. 85095).
Inhabits all types of water. Juveniles occur exclusively in very soft and acid, clear and black water while sub-adults occur in whitewater brooks (Ref. 85095).
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 幼生
Römer, U., I.J. Hahn and P.M. Vergara, 2010. Description of Discrossus foirni sp. n. and Dicrossus warzeli sp. n. (Teleostei: Perciformes: Cichlidae), two new cichlid species from the Rio Negro and the Rio Tapajós, Amazon drainage, Brazil. Verteb. Zool. 60(2):123-138. (Ref. 85095)
Human uses
用具
特記事項
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インターネットの情報源
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00724 (0.00283 - 0.01852), b=3.13 (2.91 - 3.35), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
栄養段階 (Ref.
69278): 3.2 ±0.5 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
