Evolutionary History and Taxonomic Reclassification of the Critically Endangered Daggernose Shark, a Species Endemic to the Western Atlantic

Table 2

Mean () and corrected () distances calculated for the comparisons between I. oxyrhynchus and the other carcharhinid species analyzed in the present study. The analyses were based on the GTR+G(0.5093)+I(0.4665) model for the mtDNA dataset (COI, ND2, and 12S16S) and the TN93+G(0.0963) model for the RAG1 gene.

(a)

	RAG1
	I. oxyrhynchus
Species in the genus
	Mean	Minimum	Maximum	Mean	Minimum	Maximum
Carcharhinus	0.77	0.5	1.1	0.87	0.6	1.2
Prionace	1.4	1.4	—	1.6	1.6	1.6
Galeocerdo	3.2	3.2	—	4.5	4.5	4.5
Rhizoprionodon	3.35	3.3	3.4	4.95	4.9	5.0

(b)

	mtDNA
	I. oxyrhynchus
Species in the genus
	Mean	Minimum	Maximum	Mean	Minimum	Maximum
Carcharhinus	5.65	4.8	6.8	7.06	5.8	8.7
Prionace	6.4	6.4	—	8.4	8.4	8.4
Triaenodon	6.6	6.6	—	8.8	8.8	8.8
Lamiopsis	7.35	7.3	7.4	9.85	9.8	9.9
Glyphis	7.54	7.4	7.8	10.12	9.9	10.5
Rhizoprionodon	8.65	8.6	8.7	12.9	12.9	—
Galeocerdo	9.5	9.5	—	14.5	14.5	—
Loxodon	9.8	9.8	—	15.2	15.2	—
Scoliodon	11.15	11.1	11.2	19.1	18.9	19.3