>
Osteoglossiformes (Bony tongues) >
Mormyridae (Elephantfishes)
Etymology: Paramormyrops: Greek, para = near + Greek, mormyros = a fish (Sparus sp) (Ref. 45335); ntotom: The species name, ntotom, is the word for mormyrid fish in the language of the Fang people from northern Gabon, Equatorial Guinea and southern Cameroon (Ref. 116799).
Môi trường: môi trường / vùng khí hậu / Mức độ sâu / phạm vi phân phối
Sinh thái học
; nước ngọt sống nổi và đáy. Tropical
Africa: Ogowe River in Gabon (Ref. 116799).
Bộ gần gũi / Khối lượng (Trọng lượng) / Tuổi
Chín muồi sinh dục: Lm ?  range ? - ? cm
Max length : 18.3 cm SL con đực/không giới tính; (Ref. 116799)
Mô tả ngắn gọn
Khóa để định loại | Hình thái học | Sinh trắc học
Các tia vây lưng cứng (tổng cộng) : 0; Các vây lưng mềm (tổng cộng) : 19 - 21; Tia cứng vây hậu môn: 0; Tia mềm vây hậu môn: 24 - 26; Động vật có xương sống: 41 - 44. Diagnosis: Paramormyrops ntotom is distinguished from all other Lower-Guinea Paramormyrops by a combination of morphological and electrical characteristics: 5 teeth in upper-jaw, 6 in lower; 12 circumpeduncular scales; V-shaped snout profile viewed from above, snout angle 38-50°, corresponding to an interorbital width 0.8-1.05 times the snout length; body depth 14.9-18.1% of standard length, 81-91.6% of body depth at urogenital pore; eye diameter 12.4-14.7% of head length measured to end of opercular bone; snout length 23.8-28.3% of head length; ratio of head length to depth 1.25-1.40; head length 20.4-24.6% of standard length; EOD waveform with two phases, head positive then negative, duration 4.78 ± 1.10 ms with a corresponding peak power spectral frequency, 265 ± 67 Hz; electric organ composed of type NPp electrocytes (Ref. 116799). With its 5/6 teeth, 12 circumpeduncular scales and sharp snout, Paramormyrops ntotom differs from all other described Paramormyrops except P. curvifrons and P. spekodes (Ref. 116799). Five morphological characters distinguish P. ntotom from P. curvifrons: ratio of head length to standard length shorter in P. ntotom compared with P. curvifrons; slight concave depression in the forehead in advance of the orbit and a relatively compact snout compared to P. curvifrons which has a longer snout, downward sloping, often with a slightly protruding chin and upper lip; shorter prepectoral distance relative to predorsal distance; snout angle greater in P. ntotom than P. curvifrons; and the head depth relative to head length greater in P. ntotom than in P. curvifrons; EOD duration slightly longer in P. ntotom compared with P. curvifrons, with extensive overlap; both species have type NPp electrocytes in the electric organ and both exhibit sex differences in EOD duration (Ref. 116799). Paramormyrops ntotom differs from P. sphekodes in the six following morphological characters: larger overall size at sexual maturity; head more elongate and less rounded; snout reduced; larger caudal peduncle depth to length ratio; the smaller eye diameter relative to head length; and the greater EOD duration; when alive P. ntotom is most easily distinguished from P. sphekodes by its longer EOD duration and a correspondingly lower peak spectral frequency; the EODs of P. ntotom and P. sphekodes also differ in shape, with the width of first and second phase being equal for P. ntotom, while W1 is longer than W2 in P. sphekodes; living specimens of these two species also differ in colouration: dorsal and anal fin pigmentation tends to be darker in P. ntotom than P. sphekodes, and the ground colour of the skin tends to be darker chocolate brown compared to yellow brown in P. sphekodes (Ref. 116799).
Body shape (shape guide): elongated.
Vòng đời và hành vi giao phối
Chín muồi sinh dục | Sự tái sinh sản | Đẻ trứng | Các trứng | Sự sinh sản | Ấu trùng
Rich, M., J.P. Sullivan and C.D. Hopkins, 2017. Rediscovery and description of Paramormyrops sphekodes (Sauvage, 1879) and a new cryptic Paramormyrops (Mormyridae: Osteoglossiformes) from the Ogooué River of Gabon using morphometrics, DNA sequencing and electrophysiology. Zool. J. Linn. Soc. 180:613-646. (Ref. 116799)
Tình trạng Sách đỏ IUCN (Ref. 130435: Version 2025-2 (Global))
Mối đe dọa đối với con người
Harmless
Sử dụng của con người
Các công cụ
Báo cáo đặc biệt
Tải xuống XML
Các nguồn internet
Ước tính dựa trên mô hình
Chỉ số đa dạng phát sinh loài (Tài liệu tham khảo
82804): PD
50 = 0.5010 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00562 (0.00248 - 0.01273), b=3.05 (2.85 - 3.25), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Mức dinh dưỡng (Tài liệu tham khảo
69278): 3.2 ±0.3 se; based on size and trophs of closest relatives
Thích nghi nhanh (Tài liệu tham khảo
120179): Chiêù cao, thời gian nhân đôi của chủng quần tối thiểu là dưới 15 tháng (Preliminary K or Fecundity.).
Sự dễ bị tổn thương của nghề đánh cá (Ref.
59153): Low vulnerability (12 of 100).
🛈