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Characiformes (Characins) >
Acestrorhamphidae (American tetras) > Megalamphodinae
Etymology: Petitella: French, petit = small, diminituve (Ref. 45335).
Eponymy: Professor Georges Jean-Jacques Petit (1892–1973) was a French marine biologist at the Muséum National d’Histoire Naturelle. [...] Georgette Géry was the wife of the author Dr Jacques Géry (1917–2007) (q.v.). Although the original text was silent, the author later revealed that this was the lady honoured. (Also see Georgia) (Ref. 128868), visit book page.
More on authors: Géry & Boutière.
Taxonomic Remarks
See Géry & Mahnert (1986) for remarks on taxonomy and distribution.
محیط زیست: محیط زیست / منطقه آب و هوایی / تغييرات عمق / محدوده توزیع
بوم شناسي
; آب شيرين سطح زی; pH range: 5.5 - 7.0; dH range: ? - 12. Tropical; 22°C - 26°C (Ref. 1672)
South America: upper Amazon River basin in Peru; Purus, Negro, and Madeira River basins.
اندازه / وزن / سن
بلوغ: Lm ? range ? - ? cm
Max length : 3.9 cm SL جنس نر / بدون خواص جنسي; (Ref. 38376)
This species is distinguished from its congeners by the following characters: maxillary long and wide (vs. very short and round in bleheri and short in rhodostoma); premaxillary teeth in a single row (vs. two in bleheri, rhodostoma); dentary with 9-11 teeth with 5 cuspids (vs. 6, with 6-7 cuspids, followed by 1 or 2 tricuspidate ones in bleheri, and 5-6 with 5 cuspids, usually followed by 4 conical teeth in rhodostoma); black spot on lower posterior border of caudal peduncle absent (vs. present in bleheri, rhodostoma) (Ref. 127081)
Cross section: compressed.
Feeds on worms, small crustaceans and plant matter (Ref. 7020). Aquarium keeping: in groups of 5 or more individuals; minimum aquarium size 80 cm (Ref. 51539).
چرخه زندگی و رفتار جفتگیری
بلوغ | تولید مثل | تخم ریزی | تخم ها | باروری | توزاد ( لارو)
Lima, F.C.T., L.R. Malabarba, P.A. Buckup, J.F. Pezzi da Silva, R.P. Vari, A. Harold, R. Benine, O.T. Oyakawa, C.S. Pavanelli, N.A. Menezes, C.A.S. Lucena, M.C.S.L. Malabarba, Z.M.S. Lucena, R.E. Reis, F. Langeani, C. Moreira et al. …, 2003. Genera Incertae Sedis in Characidae. p. 106-168. In R.E. Reis, S.O. Kullander and C.J. Ferraris, Jr. (eds.) Checklist of the Freshwater Fishes of South and Central America. Porto Alegre: EDIPUCRS, Brasil. (Ref. 38376)
وضعيت در فهرست قرمز IUCN (Ref. 130435: Version 2025-2 (Global))
خطر برای انسان ها
Harmless
استفاده انسانی
ماهي گيري – شيلات: با ارزش تجاري بالا; آكواريوم: با ارزش تجاري بالا
ابزارها
گزارش های ويژه
بارگيری XML
منابع اينترنتي
تخمینها بر اساس مدلها
شاخص تنوع فیلوژنتیکی (مرجع
82804): PD
50 = 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01122 (0.00447 - 0.02817), b=3.07 (2.86 - 3.28), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
سطح تروفیک (مرجع
69278): 3.0 ±0.32 se; based on food items.
جهندگی (مرجع
120179): زياد, كمينه زمان لازم براي دو برابر شدن جمعيت ، كمتر از 15 ماه (Preliminary K or Fecundity.).
آسیبپذیری ماهیگیری (Ref.
59153): Low vulnerability (10 of 100).
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