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Siluriformes (Catfishes) >
Loricariidae (Armored catfishes) > Hypoptopomatinae
Etymology: Pseudotothyris: Greek, pseudes = false + Greek, ous, otis = ear + Greek, thyris, -idos = little door (Ref. 45335); ignota: Derived from the Latin ignotus, meaning unknown or ignored, because this species has been identified as Pseudotothyris obtusa since the description of the older species in 1911.
البيئة: الوسط / المنطقة المناخية / نطاق العمق / نطاق التوزيع
البيئة
; المياه العذبة القاع. Tropical
South America: coastal drainages from Iguape in São Paulo state to São João do Rio Vermelho in Santa Catarina state, Brazil.
الحجم / وزن / العمر
النضج: Lm ?  range ? - ? cm
Max length : 3.3 cm SL ذكر/ مختلط الجنس; (Ref. 116384)
وصف مختصر
مفاتيح التعريف | الوصف الخارجي | قياسات المظهر الخارجي
الأشعة الظهرية الناعمة (المجموع) : 8 - 9; أشعه شرجية لينه: 6; فقرات: 28 - 29. Pseudotothyris ignota is distinguished from all congeners by possessing the anterior margin of snout with an odontode-free band (vs. anterior margin of snout completely covered by odontodes). It can be further differentiated from Pseudotothyris obtusa by having 32-47 teeth on the upper pharyngeal toothplate (vs. 20-30); 15-31 teeth on ceratobranchial 5 (vs. 12-15); first anal-fin pterygiophore contacting the 13th vertebra (vs. 12th); and metapterygoid-hyomandibula suture complete, the bones contacting each other dorsally to the suture (vs. metapterygoid-hyomandibula suture reduced, the bones not contacting each other dorsally to the suture. It can be further distinguished from Pseudotothyris janeirensis by the presence of three transverse dark saddles on the dorsum (vs. absence); absence of spinelet (vs. presence); generally presence of subocular cheek plate (vs. always absence); and odontodes on lateral plates randomly distributed (vs. odontodes aligned in well-defined series) (Ref. 116384).
Body shape (shape guide): elongated.
Inhabits coastal drainages from Iguape in São Paulo state to São João do Rio Vermelho in Santa
Catarina state, Brazil. Occurs sympatrically with Pseudotothyris obtusa in small coastal drainages in Iguape, Cananéia, and Ilha Comprida, which are adjacent to Ribeira de Iguape basin (Ref. 116384).
دورة الحياة وسلوك التزاوج
النضج | التكاثر | وضع البيض | بيض | الخصوبة | اليرقات
Martins, F.O., H.A. Britski and F. Langeani, 2014. Systematics of Pseudotothyris (Loricariidae: Hypoptopomatinae). Zool. J. Linn. Soc. 170:822-874. (Ref. 116384)
حالة القائمة الحمراء للاتحاد الدولي لحفظ الطبيعة والموارد الطبيعية (Ref. 130435: Version 2025-2 (Global))
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مؤشر التنوع الشُعبي الوراثي (مرجع 82804) |
PD50 = 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00977 (0.00436 - 0.02192), b=3.06 (2.87 - 3.25), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
مستوى غذائي (مرجع 69278) |
2.4 ±0.1 se; based on size and trophs of closest relatives |
المرونه (مرجع 120179) |
عالي, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع أقل من 15 شهر (Preliminary K or Fecundity.). |
ضعف الصيد (Ref. 59153) |
Low vulnerability (10 of 100). 🛈 |