Abstract
Two new species of Mogurnda are described from the Arguni
Bay region of West Papua, Indonesia. Mogurnda arguni,
new species is described from 80 specimens , 17.5-92.1
mm SL, collected from a small tributary of the Togarni River
in the northeastern reaches of the Arguni Bay drainage. It
is most similar to M. magna from the Triton Lakes (lying
about 80 km southeast) and M. mbuta, from the Etna Bay
region (about 120 km southeast). The main differences consist
of a smaller head, longer pelvic fins, longer caudal fin,
fewer predorsal scales and a much smaller size in M. arguni
in comparison with M. magna. Most of these differences are
also shared with M. mbuta, which exhibits pronounced
modal differences in number of pectoral-fin rays (78% with
16 rays vs. 48% in M. arguni) and slightly higher number of
rakers on the lower limb of the first gill arch. Mogurnda
kaimana, new species is described from 38 specimens, 11.5-
110.2 mm SL, collected from Lake Furnusu, a small mountain
lake 15 km northeast of Kaimana. It is most similar to
M. pardalis from the Triton Lakes but differs in lateral and
predorsal scale counts, body depth, head length, interorbital
width, pelvic-fin length, and caudal-peduncle length. In addition,
preserved specimens of M. kaimana are uniformly
dark compared to the lighter mottled pattern of M. pardalis