分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Cichliformes (Cichlids, convict blennies)
鱸形目 (Cichlids, convict blennies) >
Cichlidae (Cichlids)
慈鯛科魚類 (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
生態學
; 淡水 底中水層性.
South America: Rio Negro, Amazon drainage in Brazil.
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 7.1 cm SL 雄魚/尚未辨別雌雄; (Ref. 85095); 4.5 cm SL (female)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
背棘 (總數) : 15 - 16; 背的軟條 (總數) : 6 - 7; 臀棘: 3; 臀鰭軟條: 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 | 仔魚
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)
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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).
營養階層 (Ref.
69278): 3.2 ±0.5 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
