Mastacembelus ubangipaucispinis

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Mastacembelus ubangipaucispinis Roberts, 2020

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drawing shows typical species in Mastacembelidae.

Classification / Names ຊື່ສາມັນ | ຄຳສັບຄ້າຍຄືກັນ | Catalog of Fishes(ຕະກຸນ, ຊະນິດ) | ITIS | CoL | WoRMS | Cloffa

> Synbranchiformes (Spiny eels) > Mastacembelidae (Spiny eels)
Etymology: Mastacembelus: Greek, mastax, -agos = bite + Greek, emballo = to throw oneself (Ref. 45335).

Environment: milieu / climate zone / depth range / distribution range ນິເວດວິທະຍາ

; ນ້ຳຈືດ ກ່ຽວກັບ (ຢູ່)ເທິງຊັ້ນພື້ນດິນໃນທະເລເປີດ. Tropical

ການແຜ່ກະຈາຍ ປະເທດ | ເຂດ FAO | ລະບົບນິເວດ | ການປະກົດຕົວ | Point map | ການແນະນຳ | Faunafri

Africa: Ubangi River, Congo River basin, in Central African Republic (Ref. 123814).

ຂະໜາດ / ນ້ຳໜັກ / Age

Maturity: Lm ?  range ? - ? cm
Max length : 20.7 cm SL ຕົວຜູ້/ບໍ່ມີເພດ; (Ref. 123814)

Short description ສະລີລະວິທະຍາ | ການວັດແທກຮູບຮ່າງລັກສະນະພາຍນອກຂອງດິນ,ສັດ,ປາ…

ຄີ (ໜາມ)ແຂງຢູ່ຫຼັງປາ (ທັງໝົດ): 10; ຄີຫຼັງຂອງປາ (ຄີອ່ອນ) (ທັງໝົດ): 101; ສັດທີ່ມີກະດູກສັນຫຼັງ: 81. Diagnosis: Mastacembelus ubangipaucispinis is most similar to M. paucispinis in having 10 dorsal-fin spines, vs. 6-10, only 101 soft dorsal-fin rays, vs. 115-123, in having a well-developed colour pattern instead of a colouration largely reduced or absent in some specimens (Ref. 123814). Base of first dorsal-fin spine above vertebra 7, base of last dorsal fin spine above vertebra 17, base of first anal-fin spine below vertebrae 31, vs. 6 and 14, and below 30 in M. paucispinis; vertebrae 27+54=81, vs. 28-29+51-55=80-84 in M. paucispinis; to the extent colouration of M. paucispinis is visible it resembles that of M. ubangipaucispinis, particularly in the presence of about 15 small dark spots along the dorsal-fin base, and faint vertical bars on the side of the body for its entire length (Ref. 123814). Similarities of M. ubangipaucispinis and M. paucispinis: the uniquely low number of dorsal-fin spines shared by M. ubangipaucispinis and M. paucispinis, beginning only four or five to probably 6 or 7 vertebrae behind the head and followed by over 100 dorsal-fin rays, is evidence that these two species are each other's closest relatives, as is the persistence of similarities in the reduced or obsolescent colour pattern of M. paucispinis to the well-developed colouration of M. ubangipaucispinis; that they are distinct species is supported by M. ubangipaucispinis having only 101 dorsal fin rays instead of 115-123 (Ref. 123814). So far as known no Mastacembelus species with 6-10 dorsal-fin spines occurs in the upper rapids of the Congo mainstream above Kisangani; retention of full colouration and its lower dorsal fin ray count might suggest, although highly speculative, that M. ubangipaucispinis reperesents the ancestral species of M. paucispinis, and that it evolved from individuals of M. ubangipaucispinis carried downstream from rapids of the Ubangi River to rapids of the mainstream Congo below Kinshasa (Ref. 123814).

ຊີວະສາດ     ຄຳແປສັບ (ຕ.ຢ. epibenthic)

Life cycle and mating behavior ການຈະເລີນເຕັມໄວ | ການສືບພັນ | ການວາງໄຂ່ | ໄຂ່ | ຄວາມດົກຂອງໄຂ່ປາ | ຕົວອ່ອນ

Main reference Upload your references | ເອກະສານອ້າງອີງ | ຜູ້ປະສານງານ | ຜູ້ຮ່ວມມື

Roberts, T.R., 2020. Two new species of the spiny percheel genus Mastacembelus (Synbranchiformes, Mastacembelidae) with low numbers of dorsal fin spines from the Congo basin. Aqua, Int. J. Ichthyol., 26(3-4):69-76. (Ref. 123814)

IUCN Red List Status (Ref. 130435)


CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





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Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = No PD50 data   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00257 (0.00122 - 0.00544), b=2.97 (2.79 - 3.15), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
ຊັ້ນເຂດຮ້ອນ (Ref. 69278):  3.7   ±0.6 se; based on size and trophs of closest relatives
ຄວາມຢືດຢຸ່ນ (Ref. 120179):  ສູງ, ປະຊາກອນຕຳ່ສຸດທີ່ໃຊ້ເວລາສອງໜ້ອຍກວ່າ 15 ເດືອນ (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153):  Low vulnerability (15 of 100).