Leptocephalus (genus)

Leptocephalus is a genus that was used for species of larval eels, called leptocephali, that were thought to be new fish species, or whose adult eel species were not known. Leptocephali differ so much in appearance from their adults that the larvae and adults of eels are not easily matched, and when first discovered, leptocephali were thought to be a distinct type of fishes,[1] but not eels. Because of this, the genus designation of Leptocephalus was used for a while for unidentified leptocephali even after it was known that these were the larvae of eels thus becoming a "wastebasket taxon", but this practice is no longer used. Examples of marine congrid larvae, found in the western Indian Ocean and the Red Sea that were named this way are listed below. Only two species (L. bellottii and L. ophichthoides) in two families are currently treated as having any validity, though the validity of L. bellottii is strongly in doubt.

Leptocephalus
Scientific classification
Kingdom:
Animalia
Phylum:
Chordata
Class:
Actinopterygii
Order:
Anguilliformes
Family:
Ophichthidae (one doubtfully valid species in Nettastomatidae)
Genus:
Leptocephalus

Scopoli (ex Gronow), 1777
Species

See text.

Species

There are 16 families of leptocephalus organisms that include over 70 species.[2] They will be broken down according to the species that they contain. If the species has a common name or English name, it will be given after a dash. A common name can belong to many species.

Family Anguillidae

Leptocephalus brevirostris – European Eel

Leptocephalus grassii - American Eel

Family Chlopsidae

Leptocephalus hyoproroides – False Moray

Family Colocongridae

Leptocephalus giganteus - Giant Leptocephalus

Family Congridae

Leptocephalus congroides D'Ancona, 1928 (valid as Heteroconger congroides)

Leptocephalus cotroneii

Leptocephalus ectenurus

Leptocephalus erebennus

Leptocephalus inferomaculatus

Leptocephalus nystromi

Leptocephalus trilineatus

Leptocephalus orbignyanus – Argentine conger

Leptocephalus affinis – bandtooth conger

Leptocephalus eckmani - bandtooth conger

Leptocephalus inornatus - bandtooth conger

Leptocephalus marginatus - bandtooth conger

Leptocephalus microphthalmus -bandtooth conger

Leptocephalus rex – bandtooth conger

Leptocephalus taenia – bandtooth conger

Leptocephalus retrotinctus – blackedge conger

Leptocephalus mauritianum - blunt tooth conger

Leptocephalus wilsoni - cape conger

Leptocephalus candidissimus - European conger

Leptocephalus conger - European conger

Leptocephalus gussoni - European conger

Leptocephalus inaequalis - European conger

Leptocephalus lineatus - European conger

Leptocephalus morrisii – European conger

Leptocephalus pellucidus – European conger

Leptocephalus spallanzani – European conger

Leptocephalus stenops – European conger

Leptocephalus vitreus – European conger

Leptocephalus splendens – purplemouthed conger

Leptocephalus capensis - Southern conger

Leptocephalus maculatus - spotted garden eel

Leptocephalus scheelei – tropical conger

Family Cyprinidae

Leptocephalus mongolicus - Mongolian redfin

Family Derichthyidae

Leptocephalus ingolfianus - duckbill oceanic eel

Leptocephalus anguilloides - narrownecked oceanic eel

Family Eurypharyngidae

Leptocephalus pseudolatissimus – pelican eel

Family Moringuidae

Leptocephalus diptychus - spaghetti eel

Leptocephalus tuberculatus

Family Muraenesocidae

Leptocephalus arabicus

Family Muraenidae

Leptocephalus euryurus

Leptocephalus forsstromi - purplemouth moray

Leptocephalus similis – pygmy moray

Family Nemichthyidae

Leptocephalus oxycephalus - avocet snipe eel

Leptocephalus curvirostris – boxer snipe eel

Leptocephalus polymerus - boxer snipe eel

Leptocephalus andreae – slender snipe eel

Leptocephalus canaricus – slender snipe eel

Leptocephalus acuticeps – southern snipe eel

Family Nettastomatidae

Leptocephalus bellottii D'Ancona, 1928 (probably junior synonym of Nettenchelys bellottii)

Leptocephalus lateromaculatus

Leptocephalus saurencheloides

Leptocephalus longirostris - blackfin sorcerer

Leptocephalus urosema - blackfin sorcerer

Leptocephalus oxyrhynchus - Facciola's sorcerer

Leptocephalus stylurus – pillar wire eel

Family Ophichthidae

Leptocephalus echeloides

Leptocephalus ophichthoides

Leptocephalus crenatus – key worm eel

Leptocephalus hexastigma – key worm eel

Leptocephalus humilis - key worm eel

Leptocephalus mucronatus – margined snake eel

Leptocephalus undulatus - sharptail eel

Leptocephalus gilberti - sooty eel

Leptocephalus mollis – speckled worm eel

Leptocephalus caudomaculatus – spotted spoon-nose eel

Family Saccopharyngidae

Leptocephalus latissimus – gulper eel

Family Serrivomeridae

Leptocephalus lanceolatus – Bean's sawtooth eel

Leptocephalus lanceolatoides – short tooth sawpalate

Family Synaphobranchidae

Leptocephalus dolichorhynchus

Leptocephalus proboscideus

Leptocephalus telescopicus – pignosed arrowtooth eel

gollark: Who knows.
gollark: "hmm, perhaps my program did not work because of this grain of dust in orbit of Jupiter"
gollark: They don't consider *all* possibilities. There are an infinite number of those.
gollark: I would post gecko or something, but I don't have anything with a good camera around now (my phone is being annoying and broken) and Gordona just sits inside some hollow rock thing in her terrarium mostly.
gollark: Hmm, that is cat.

References
  1. Miller, Michael J. “Ecology of Anguilliform Leptocephali: Remarkable Transparent Fish Larvae of the Ocean Surface Layer.” Aqua-BioScience Monographs 2 (2009): 1-94. Web. 2 Nov. 2012.
  2. Species of Leptocephalus Genus Fishbase.org
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