Abstract
The leptocephali of the Taiwanese duckbill conger are described in detail for the first time based on specimens collected from near the type locality. Morphological and molecular features are employed to compare the leptocephali, juveniles and adults. The morphology of leptocephali can be divided into three stages, with clear metamorphosis of the jaw structure and morphometric proportions. Detailed description and comparison of each leptocephalic stage, juveniles and adults, and the ontogenetic changes of leptocephali are provided.
References
Alcock, A.W. (1889) Natural history notes from H. M. Indian marine survey steamer `Investigator,' Commander Alfred Carpenter, R. N., D. S. O., commanding.--No. 13. On the bathybial fishes of the Bay of Bengal and neighbouring waters, obtained during the seasons 1885–1889. Annals and Magazine of Natural History, Series 6, 4 (24), 450–461.
https://doi.org/10.1080/00222938909460563Castle, P.H.J. (1977) Leptocephalus of the muraenesocid eel Gavialiceps taeniola. Copeia, 1977 (3), 488–492.
https://doi.org/10.2307/1443267Chen, J.T.-F. & Weng, H.T.-C. (1967) A review of the apodal fishes of Taiwan. Biological Bulletin of Tunghai University, Ichthyology Series, 6, 1–86.
D'Ancona, U. (1928) Murenoidi (Apodes) del Mar Rosso e del Golfo di Aden. Materiali raccolti dal Prof. Luigi Sanzo nella Campagna della R. N. "Ammiraglio Magnaghi" 1923‒24. Memoria, Reale Comitato Talassografico Italiano, 146, 1–146, pls. 1–5.
Ho, H.-C. & Shao, K.-T. (2011) Annotated checklist and type catalog of fish genera and species described from Taiwan. Zootaxa, 2957, 1–74.
Ho, H.-C., McCosker, J.E., Smith D.G. & Shao, K.-T. (2015a) Introduction to the systematics and biodiversity of eels (orders Anguilliformes and Saccopharyngiformes) of Taiwan. Zootaxa, 4060 (1), 5–18.
https://doi.org/10.11646/zootaxa.4060.1.3Ho, H.-C., Smith, D.G., McCosker, J.E., Hibino, Y., Loh, K.-H., Tighe, K.A. & Shao, K.-T. (2015b) Annotated checklist of eels (orders Anguilliformes and Saccopharyngiformes) from Taiwan. Zootaxa, 4060 (1), 140–189.
https://doi.org/10.11646/zootaxa.4060.1.16Ho, H.-C., Smith, D.G., Wang, S.-I., Shao, K.-T., Ju, Y.-M. & Chang, C.-W. (2010) Specimen catalog of Pisces collection of National Museum of Marine Biology and Aquarium transferred from Tunghai University and Aquarium. (II) Order Anguilliformes. Platax, 7, 13–34.
Karmovskaya, E.S. (1993) Systematics and distribution of the eel genus Gavialiceps (Congridae) in the Indo-West Pacific. Journal of Ichthyology, 34 (3), 73–89.
Miller, M.J. (2009) Ecology of anguilliform leptocephali: remarkable transparent fish larvae of the ocean surface layer. Aqua-BioScience Monographs, 2 (4), 1–94.
https://doi.org/10.5047/absm.2009.00204.0001Smith, D.G. (1999) Congridae, Conger eels. In: Carpenter, K.E. & Niem, V.H. (Eds.), Species identification guide for fisheries purposes. The living marine resources of the western central Pacific. Volume 3. Batoid fishes, chimeras and bony fishes. Part 1. Elopidae to Linophrynidae. FAO, Rome, 1680–1987 pp.
Smith, D.G. (2000) In: Randall, J.E. & Lim, K.K.P. (Eds.), A checklist of the fishes of the South China Sea. Raffles Bulletin of Zoology, 8 (Supplement), pp. 569–667.
Tighe, K., Ho, H.-C. & Hatooka, K. (2018) A new species of the genus Dysommina (Teleostei: Anguilliformes: Synaphobranchidae: Ilyophinae) from the Western Pacific. Zootaxa, 4454 (1), 43–51.