Triaenodon obesus (Rüppell), Ruppell

Fernando, Daniel, Bown, Rosalind M. K., Tanna, Akshay, Gobiraj, Ramajeyam, Ralicki, Hannah, Jockusch, Elizabeth L., Ebert, David A., Jensen, Kirsten & Caira, Janine N., 2019, New insights into the identities of the elasmobranch fauna of Sri Lanka, Zootaxa 4585 (2), pp. 201-238 : 223

Triaenodon obesus (Rüppell)

( Fig. 4A )

A tissue sample was taken from a frozen specimen of Triaenodon obesus (SL-119) that had been collected earlier in 2018 from the Negombo fish market in Negombo in the Western Province. This specimen has now been deposited in the BRT Ichthyology Collection (BRT-I 0031). This specimen is morphologically consistent with T. obesus . It clustered most closely with our reference specimen of this species (KA-126; JQ518656 ) from Indonesian Borneo included in the Neighbor-Joining analysis. It differed from this specimen in NADH2 sequence by 7 bp.

This is the name currently applied to this species in Sri Lanka (e.g., De Silva 1977, 1984 –1985, 2006, 2015; De Bruin et al. 1995; Joseph 1999).

Figures

FIGURE 4. Neighbor-Joining trees of p-distances based on 1,044 bp of aligned NADH2 sequence data for individual selachian genera or groups of genera. Taxon names are followed by country, host specimen number (in parentheses), and GenBank number. Outgroup taxa used in each analysis were omitted from the individual trees. Scale bar values indicate substitutions per site. Specimens deposited in the Blue Resources Trust Ichthyology Collection are indicted by stars (see text for details). A. Carcharhinus and close relatives (Carcharhinidae). B. Rhizoprionodon (Carcharhinidae). C. Galeocerdidae. D. Hemigaleidae. E. Pseudotriakidae. F. Sphyrnidae. G. Iago (Triakidae).