324 
M. Bertrand 
Figure 1 Sellnickiella (Sellnickiella) biunguiculata sp. nov.: A, dorsal shield female; B, ventral shield, male; C, progenital 
valves of female (nota: both valves are slightly separated in order to show their articulations at anterior and 
posterior extremities); D, E, cuticular reticular patterns of dorsal shield; F, famulus of tarsus I (dorsal). 
T£. terminal eupathidial seta of palp tarsus 
U: U-shaped zone of dorsal shield 
col, 0 ) 2 : solenidia of tarsus (palp or leg) 
SYSTEMATICS 
Genus Sellnickiella Feider and Vasiliu 
Sellnickiella Feider and Vasiliu, 1969: 206. 
Type species 
Labidostoma brasiliense Sellnick, 1922, by original 
designation. 
Remarks 
This genus includes two subgenera: Dicastriella, 
which is only known from South America, and 
Sellnickiella which has been found on all the 
southern continents (Bertrand 1990a; Bertrand and 
Theron 1992); and Sellnickiella, which is noteworthy 
because unlike others members of the family it 
does not show uniformity of sclerification in adult 
stases and lacks a pair of "gland like organs" 
(which are subject to neotaxy in Eunicolina, and in 
some species of Labidostoma). The differentiated 
sclerification of the dorsal shield in Sellnickiella was 
well illustrated by Feider and Vasiliu (1970) and 
