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Gymnotiformes (Knifefishes) >
Sternopygidae (Glass knifefishes) > Eigenmanninae
Etymology: Eigenmannia: From Eigenmann, 1910, researcher of faunistic studies (Ref. 45335); sirius: Name is an allusion to the alpha star of the Canis Major constellation that represents the state of Mato Grosso in the Brazilian national flag, referring to the state of occurrence of the new taxon; noun in apposition.
Eponymy: Professor Dr Carl Henry Eigenmann (1863–1927) was a German-born American ichthyologist. [...] (Ref. 128868), visit book page.
البيئة: الوسط / المنطقة المناخية / نطاق العمق / نطاق التوزيع
البيئة
; المياه العذبة قاعية التغذية و المعيشة; نطاق العمق 0 - 2 m (Ref. 105010). Tropical
التوزيع
الأقاليم | مناطق الفاو | النظام البيئي | الظهور | نقطة علي الخريطة | مقدمة | Faunafri
South America: Brazil.
الحجم / وزن / العمر
النضج: Lm ?  range ? - ? cm
Max length : 16.6 cm TL ذكر/ مختلط الجنس; (Ref. 105010)
وصف مختصر
مفاتيح التعريف | الوصف الخارجي | قياسات المظهر الخارجي
This species is distinguished by the following characters: presence of superior midlateral stripe; mouth subterminal; depth of posterodorsal expansion on infraorbitals 1+2 corresponding to 70% length of infraorbitals 1+2; precaudal vertebrae 15; origin of the superior midlateral stripe at vertical between base of 23rd to 31st anal-fin ray; mouth width, 13.1-22.4% HL; premaxillary teeth, 15-24; dentary teeth, 15-33; scale rows above lateral line 9-12; coronomeckelian bone corresponding to 20–25% of length of Meckel’s cartilage; eye completely covered by thin membrane; snout rounded; absence of alternating dark bands on flanks; region above the lateral line on the anterior portion of the body covered by scales (Ref. 105010).
Body shape (shape guide): elongated; Cross section: compressed.
The type-locality where the specimens were collected from a clearwater river up to c. 3-6 m wide and 0.5-2.5 m deep, with preserved riparian vegetation, swift current, and sand, pebbles and dead leaves on the bottom. Several types of microenvironment were sampled exhaustively, but this species was captured only between root and subaquatic vegetation. Associated species sampled syntopically were Aequidens cf. rondoni, Erythrinus erythrinus, Hemigrammus skolioplatus, Hyphessobrycon hexastichos, H. melanostichos, Hasemania nambiquara, Hoplerythrinus unitaeniatus; and no other Gymnotiformes were collected with this species (Ref. 105010).
دورة الحياة وسلوك التزاوج
النضج | التكاثر | وضع البيض | بيض | الخصوبة | اليرقات
Peixoto, L.A.W. and W.M. Ohara, 2019. A new species of Eigenmannia Jordan & Evermann (Gymnotiformes: Sternopygidae) from rio Tapajós, Brazil, with discussion on its species group and the myology within Eigenmanniinae. PLoS ONE 14(8):e0220287:1-30. (Ref. 105010)
حالة القائمة الحمراء للاتحاد الدولي لحفظ الطبيعة والموارد الطبيعية (Ref. 130435: Version 2025-2 (Global))
استخدامات بشرية
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تقارير خاصة
تنزيل XML
مصادر علي الأنترنت
تقديرات تستند إلى النماذج
مؤشر التنوع الشُعبي الوراثي (مرجع 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00355 (0.00161 - 0.00782), b=2.97 (2.77 - 3.17), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
مستوى غذائي (مرجع 69278) |
3.1 ±0.3 se; based on size and trophs of closest relatives |
ضعف الصيد (Ref. 59153) |
Low vulnerability (10 of 100). 🛈 |