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Siluriformes (Catfishes) >
Trichomycteridae (Pencil or parasitic catfishes) > Trichomycterinae
Etymology: Trichomycterus: Greek, thrix = hair + Greek, mykter, -eros = nose (Ref. 45335); igobi: The specific name is based on a mythological character of the Tupi-Guarani Indian legend about the origin of the Iguaçu waterfalls.
البيئة: الوسط / المنطقة المناخية / نطاق العمق / نطاق التوزيع
البيئة
; المياه العذبة القاع. Tropical
South America: Lower rio Jordão of the rio Iguaçu, rio Paraná drainage in Brazil.
الحجم / وزن / العمر
النضج: Lm ?  range ? - ? cm
Max length : 9.0 cm SL ذكر/ مختلط الجنس; (Ref. 75005)
وصف مختصر
مفاتيح التعريف | الوصف الخارجي | قياسات المظهر الخارجي
الأشعة الظهرية الناعمة (المجموع) : 7 - 8; أشعه شرجية لينه: 6 - 7; فقرات: 37. Differs from its congeners by having large head 23.8-26.8% SL, which is proportionally the largest head in any Trichomycteridae. Additional diagnostic characters that distinguished this species from most or all of its congeners are the following: almost entirely cartilaginous second hypobranchial (with only vestigial ossification; mesially expanded palatine ossification; narrow and falciform cleithrum; absence of a proximal posterior concavity on the third ceratobranchial. Can be further distinguished from all congeners, except Trichomycterus stawiarski and T. sp. C, by having rigid spine-like morphology of individual procurrent rays of the caudal fin, extension of the dorsal caudal-fin procurrent rays series (extending for ten neural spine tips), and presence of ten or eleven branchiostegal rays. Dorsal fin situated on a concavity on dorsal profile of trunk, short caudal peduncle (15.4-19.7% SL) and first anal-fin ray base posterior to the vertical through the base of the last dorsal-fin ray are other useful characters for identification shared with various other species of Trichomycterus (Ref. 75005).
Feeds on larvae of Diptera (Simulidae), Ephemeroptera and Trichoptera, indicating benthic feeding habits (Ref. 75005).
دورة الحياة وسلوك التزاوج
النضج | التكاثر | وضع البيض | بيض | الخصوبة | اليرقات
Wosiacki, W.B. and M. de Pinna, 2008. Trichomycterus igobi, a new catfish species from the Rio Iguaçu drainage: the largest head in Trichomycteridae (Siluriformes: Trichomycteridae). Neotrop. Ichthyol. 6(1):17-23. (Ref. 75005)
حالة القائمة الحمراء للاتحاد الدولي لحفظ الطبيعة والموارد الطبيعية (Ref. 130435: Version 2025-2 (Global))
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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=0.00912 (0.00394 - 0.02111), b=2.97 (2.79 - 3.15), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245). |
مستوى غذائي (مرجع 69278) |
3.2 ±0.4 se; based on size and trophs of closest relatives |
ضعف الصيد (Ref. 59153) |
Low vulnerability (10 of 100). 🛈 |