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Siluriformes (Catfishes) >
Loricariidae (Armored catfishes) > Hypostominae
Etymology: Pseudancistrus: Greek, pseudes = false + Greek, agkistron = hook (Ref. 45335); zawadzkii: Named for Cláudio Henrique Zawadzki, professor at Universidade Estadual de Maringá (UEM), Maringá, Paraná State, Brazil, in recognition of his dedication and remarkable contributions to the study of the family Loricariidae.
Eponymy: Dr Cláudio Henrique Zawadzki is a zoologist, limnologist and ichthyologist who is Associate Professor of Zoology at Universidade Estadual de Maringá, Paraná, Brazil, where he also was awarded his bachelor’s degree (1993), his master’s (1996) and his [...] (Ref. 128868), visit book page.
البيئة: الوسط / المنطقة المناخية / نطاق العمق / نطاق التوزيع
البيئة
; المياه العذبة القاع. Tropical
South America: Rio Tapajós and rio Tracuá of the rio Tapajós basin in Brazil.
الحجم / وزن / العمر
النضج: Lm ? range ? - ? cm
Max length : 11.6 cm SL ذكر/ مختلط الجنس; (Ref. 95679); 12.9 cm SL (female)
وصف مختصر
مفاتيح التعريف | الوصف الخارجي | قياسات المظهر الخارجي
الأشواك الظهرية (المجموع) : 2; الأشعة الظهرية الناعمة (المجموع) : 7; شوكة شرجية: 1; أشعه شرجية لينه: 5. Pseudancistrus zawadzkii can be distinguished from all known congeners, except members of the P. barbatus group, by the possession of hypertrophied odontodes along the snout margin and the absence of evertible cheek plates. It further differs from other congeners by the combination of the following characters: whitish spots that abruptly increase in size between the head (diameter 1.1-1.3 mm) and body (diameter 2.6-3.0 mm); odontodes along margin of snout increasing gradually in length from posterior of snout tip to cheek; longest odontodes on posterior most portion of non-evertible cheek plates.; rounded spots that do not cover more than one plate along the body; head depth 67.0-72.7% of HL; cleithral width 35.2-38.0% of SL; distance between posteromedial margin of supraoccipital and dorsal-fin origin 6.7-9.2% of SL; anal-fin spine length 11.9-13.8% of SL; peduncle depth 12.5-14.2% of SL; and internares distance 12.7-16.6% of HL (Ref. 95679).
Body shape (shape guide): elongated.
Facultative air-breathing in the genus (Ref. 126274); Inhabits clear water rivers, varying from medium to large size, with rocky outcrops forming
small waterfalls and substrates of rocks and sand (Ref. 95679).
دورة الحياة وسلوك التزاوج
النضج | التكاثر | وضع البيض | بيض | الخصوبة | اليرقات
Da Costa E Silva, G. de S., F.F. Roxo, R. Britzke and C. Oliveira, 2014. New species of the Pseudacistrus barbatus group (Siluriformes, Loricariidae) with comments on its biogeography and dispersal routes. ZooKeys 406:1-23. (Ref. 95679)
حالة القائمة الحمراء للاتحاد الدولي لحفظ الطبيعة والموارد الطبيعية (Ref. 130435: Version 2025-2 (Global))
استخدامات بشرية
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تقارير خاصة
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مصادر علي الأنترنت
تقديرات تستند إلى النماذج
مؤشر التنوع الشُعبي الوراثي (مرجع
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01549 (0.00726 - 0.03306), b=2.96 (2.79 - 3.13), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
المرونه (مرجع
120179): وسيط, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع 1.4-4.4 سنة (Preliminary K or Fecundity.).
ضعف الصيد (Ref.
59153): Low vulnerability (10 of 100).
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