Parrhinotermes Holmgren, 1910

Takematsu, Yoko & Vongkaluang, Charunee, 2012, A taxonomic review of the Rhinotermitidae (Isoptera) of Thailand, Journal of Natural History 46 (17 - 18), pp. 1079-1109 : 1089-1090

Parrhinotermes Holmgren, 1910

Type species: Parrhinotermes aequalis (Haviland, 1898)

This genus is distributed in the Indomalayan and Australian regions, and nine species have been recorded from the Indomalayan region. These species were mainly separated by the shape of the right mandible and the head size. This genus is newly recorded from Thailand. In the course of our survey we have collected four series of Parrhinotermes all from South of the Kra Isthmus.

Diagnosis

Monomorphic soldiers. Head subrectangular, flat in lateral view. Fontanelle small and circular, located directly between the antennal sockets. Eyes absent. Labrum tongueshaped. Inner margin of bases of mandibles finely serrated; left mandible with two

marginal teeth; right mandible with one marginal tooth. Postmentum club-shaped. Pronotum flat, much narrower than head width.

Key to species of Parrhinotermes in Thailand

1. Marginal tooth of right mandible located in middle, posterior cutting edge strongly concave ( Figure 7F arrow). Third antennal segment one and a half times as long as the fourth ( Figure 7E )...... P. microdentiformisoides Thapa Marginal tooth of right mandible located in anterior third, posterior cutting edge not distinctly concave ( Figure 6F ). Third antennal segment as long as the fourth ( Figure 6E ).............................. P. buttelreepeni Holmgren

Figures

Figure 6. Soldier of Parrhinotermes buttelreepeni Holmgren. (A) Head, dorsal view; (B) head, lateral view; (C) pronotum; (D) postmentum; (E) antenna; (F) mandibles. Scale bar 0.5 mm.

Figure 7. Soldier of Parrhinotermes microdentiformisoides Thapa. (A) Head, dorsal view; (B) head, lateral view; (C) pronotum; (D) postmentum; (E) antenna; (F) mandibles. Scale bar 0.5 mm.