P. Grandcolas, THE GENUS THEREA-BILLBERG, 1820 - PHYLOGE NIC POSITION, NEW SPECIES, DISTRIBUTION, ECOLOGICAL VALENCY (DICTYOPTERA, BLATTARIA, POLYPHAGINAE), Canadian journal of zoology, 71(9), 1993, pp. 1816-1822
The genus Therea Billberg, 1820 is redefined as a monophyletic taxon b
elonging to the group Ergaula + Eucorydia + Therea + Cryptocercus in t
he subfamily Polyphaginae Kirby, 1904. Three new species, T. regularis
, T. defranceschii, and T. hyperguttata, are described as well as T. p
etiveriana (Linnaeus, 1758) and T nuptialis (Gerstaecker, 1861). The k
nown distribution of the genus in India extends from dry deciduous for
ests to more humid formations (between latitudes 19 and 10-degrees N).
The species live in areas with mean annual rainfall ranging from 500
to 3800 mm.