Batasio
fluviatilis (Smith, 1931) |
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| Image
contributors to this species: |
|
Nonn
Panitvong
(1)
Piscesilim (1)
Johnny
Jensen's Photographic Library (3) |
| ScotCat
Sources: |
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| Other
Sources: |
 
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| Relevant
Information: |
Batasio species
are small, laterally compressed bagrid catfishes generally found
in fast-flowing hill streams throughout South Asia, Myanmar, the
Salween and Mae Khlong drainages of Thailand and the northern Malay
Peninsula. They are diagnosed (together with Chandramara)
from other members of the Bagridae in possessing large sensory pores
on the head, a narrow mental region, the transversely elongated,
bar-like entopterygoid, and the close contact of the metapterygoid
with the quadrate (Mo, 1991). Batasio is distinguished
from Chandramara by the absence (vs. presence) of a pair
of prominent posterior processes on the anterior part of the vomer.
Batasio fluviatilis is now a senior subjective
synonym of B. havmolleri (Ng, H.H. and M.Kottelat, 2007)
and we have left the link to Fishbase as B. havmolleri as
their records have not been updated as from this date 01/08/2010.
Dorsal spines (total): 1 - 1; Dorsal soft rays (total): 7-7; Anal
spines: 4 -5; Anal soft rays: 8 -9. Body with dark brown predorsal
oblique bar and a dark brown spot on the side below the adipose
fin; dorsal spine length 10.7-12.4% SL; length of adipose-fin base
30- 33.3% SL; body depth at anus 18.7-21.1% SL; snout length
38.3-41.5% HL; eye diameter 18.2-23.5% HL; interorbital distance
25.9-28.6% HL. Occurs in rivers and streams
with moderate to swift current and a predominantly rocky bottom;
less often in slow-flowing streams with a muddy substrate. Hides
among stones or submerged vegetation during the day and comes out
at night to feed. |
| Common
Name: |
None |
| Synonyms: |
Mystus
havmolleri, Mystus stigmaturus, Batasio havmolleri |
| Family: |
Bagridaemblycipitidae |
| Distribution: |
Asia: Malay Peninsula,
south of isthmus of Kra and north of Perak River basin and Terengganu
River. Type locality: Klong Thalerng near Ronpibun,
Peninsular Siam. |
| Size:
|
7.0cm (
2¾ins) |
| Temp: |
23-27°C
(73-81°F) |
| p.H. |
6.5-7.0. |
| Reference: |
Ng, H.H. and M.
Kottelat 2001 A review of the genus Batasio (Teleostei:
Bagridae) in Indochina, with the description of B. tigrinus sp.
n. from Thailand. Rev. Suisse Zool. 108(3):495-511.
Ng, H.H. and M. Kottelat 2007 Batasio feruminatus,
a new species of bagrid catfish from Myanmar (Siluriformes: Bagridae),
with notes on the identity of B. affinis and B. fluviatilis. Ichthyol.
Explor. Freshwaters, Vol. 18, No. 4, pp. 289-300. |
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