Hemigrammus tridens Eigenmann (Characiformes, Characidae): first records of a small tetra from the Paraná River basin Author Azpelicueta, María de las Mercedes Author Koerber, Stefan text Revue suisse de Zoologie 2017 2017-03-31 124 1 67 71 journal article 10.5281/zenodo.322666 322666

Table 1. Measurements of nine specimens of Hemigrammus tridens from the Paraná River basin inArgentina and Paraguay. Güyraugua N=5. San Cosme N=3. Puerto Tirol N=1.

Hemigrammus tridens		Paraguay	Argentina		Argentina
*length between pelvic-fin origin and anal-fin origin; **length between anal-fin origin and middle caudal-fin rays.
		Güyraugua	San Cosme		Puerto Tirol
	min	max	min	max
SL	15.00	16.90	16.50	17.30	19.50
Percentage in SL
predorsal length	1.67	1.84	2.2	2.4	1.86
prepelvic length	1.75	2.01	1.76	1.84	1.88
preanal length	1.48	1.56	1.48	1.59	1.47
maximum body depth	2.78	2.95	2.89	3.00	3.07
head length	3.16	3.25	3.05	3.11	3.36
anal-fin base	3.78	3.9	4.12	4.2	3.82
pectoral length	5.0	3.96	4.17	4.71	4.02
ventral length	3.95	4.84	4.24	4.71	4.43
pelvic fin/anal fin length*	2.8	3.05	2.73	2.84	2.63
anal fin/caudal rays length**	2.56	2.67	2.63	2.74	2.56
Percentage in head length
snout	3.69	4.08	3.7	3.92	3.6
eye	2.00	2.22	2.29	2.54	1.98
interobital distance	3.06	3.69	2.94	3.17	3.05
postorbital distance	2.04	2.4	2.1	2.43	2.14