Answers are grounded in this paper and cite their sources.
Sphyrna gilberti sp. nov. is described based on 54 specimens collected in the coastal waters of South Carolina, U.S.A. Morphologically, S. gilberti sp. nov. is separable from S. lewini (Griffith & Smith 1834) only in the number of precaudal vertebrae. Due to rarity of specimens and the highly migratory behavior of most sphyrnids, the range of S. gilberti sp. nov. is unknown.
No takes yet. Share an insight, caveat, or question.
Quattro et al. (2013) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: