Classification / Names
Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa
Teleostei (teleosts) >
Cypriniformes (Carps) >
Nemacheilidae (Brook loaches)
Etymology: Lefua: A Niuean word that means "kingship", "royalty"; nishimurai: Name 'nishimurai' dedicated to Toshiaki Nishimura, who first morphologically distinguished this novel species.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; demersal. Temperate
Asia: Japan.
Size / Weight / Age
Maturity: Lm ? range ? - ? cm
Max length : 6.3 cm SL male/unsexed; (Ref. 133057)
Short description
Identification keys | Morphology | Morphometrics
Dorsal soft rays (total): 8 - 10; Anal soft rays: 8 - 10; Vertebrae: 39 - 43. This species is distinguished from its congeners by the following set of characters: rhomboid or triangular dark blotches on middle of caudal fin base absent; black longitudinal stripe on both body sides in mature males absent; dusky cross bars on dorsal area of body absent; dusky bar beside dorsal fin base absent; eyes located dorsally on head; narrow conspicuous longitudinal mark between base of outer rostral barbel and eye; small dorsal fin; small or bit diameter (6.3-11.2% of head length); small value of interorbital width relative to body width (28.1-39.4%); dark spots dorsally and ventrally on caudal fin base; small dark brown spots from snout to caudal peduncle; small dark spots on dorsal and caudal fins (approximately same size as eyes) (Ref. 133057).
Cross section: oval.
This species dwells in small mountain streams with soft bottom composed of sand and gravel. It hides under rocks and stones at the river edge or sediments, as well as under fallen leaves from the trees around the water body (Ref. 133057).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Katayama, Y. and N. Sawada, 2024. Integrative taxonomy revealed a new species of Lefua (Teleostei, Nemacheilidae) from Fukui Prefecture, Japan. Evol. Syst. 8:247-260. (Ref. 133057)
IUCN Red List Status (Ref. 130435: Version 2025-1)
Threat to humans
Harmless
Human uses
Fisheries: of no interest
Tools
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Internet sources
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5078 [Uniqueness, from 0.5 = low to 2.0 = high].
Trophic level (Ref.
69278): 2.8 ±0.3 se; based on size and trophs of closest relatives
Resilience (Ref.
120179): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
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