Chance, luck and a fortunate finding: a new species of watersnake of the genus Helicops Wagler, 1828 (Serpentes: Xenodontinae), from the Brazilian Pantanal wetlands Author Moraes-Da-Silva, Antonio Author Amaro, Renata Cecília Author Sales Nunes, Pedro M. Author Strüssmann, Christine Author Junior, Mauro Teixeira Author Jr, Albedi Andrade Author Sudré, Vinícius Author Recoder, Renato Author Rodrigues, Miguel Trefaut Author Curcio, Felipe Franco text Zootaxa 2019 2019-08-06 4651 3 445 470 journal article 26078 10.11646/zootaxa.4651.3.3 7241cccf-a1ad-4a08-acb6-cff27cb2b883 1175-5326 3363353 FA2E3659-C2A3-45E9-BBB0-3798EE05808E

TABLE 1. Dataset combining literature data provided by Kawashita-Ribeiro et al. (2013) and Costa et al. (2016), as well as specimens directly examined in the present study. Numbers in parentheses reflect specimens of our sample that were also examined by other authors. The species H. yacu does not appear in the combined dataset and pertinent comparisons relied strictly on the respective original description.

Species	Sample size of	Sample size of	Present	Combined
	Kawashita-Ribeiro et al. (2013)	Costa et al. (2016)	study	dataset
Helicops angulatus	117 (13)	3	27 (13)	134
Helicops apiaka	26 (10)	–	10 (10)	26
Helicops carinicaudus	–	9	23	32
Helicops danieli	–	–	2	2
Helicops gomesi	–	–	4	4
Helicops hagmanni	–	–	15	15
Helicops infrataeniatus	1	8	17	26
Helicops leopardinus	259 (11)	3	45 (11)	296
Helicops modestus	1	7	21	29
Helicops nentur	–	5 (1)	1 (1)	5
Helicops pastazae	–	–	2	2
Helicops petersi	–	–	1	1
Helicops polylepis	7 (6)	–	24 (6)	25
Helicops scalaris	–	–	2	2
Helicops tapajonicus	–	–	3	3
Helicops trivittatus	–	–	16	16
Sample size	411 (40)	35 (1)	211 (41)	616
Number of species used in comparisons	6	6	16	16