110 Invasive Stink Bugs and Related Species (Pentatomoidea)
Patanius Rolston, 1987
This genus and its only included species (P. vittatus Rolston [Figure 2.32J]) were described by
Rolston (1987a) among an artificial group of seven South American genera that have the abdominal base
unarmed and the ostiolar rugae elongate and acuminate apically. Two members of this group have been
placed in tribes (e.g., Arocera in the Catacanthini, Chloropepla in the Chlorocorini), but the placement
of the remaining five genera is questionable (Brasilania, Cyptocephala, Patanius, Senectius Rolston, and
Thyanta). One interesting character of this genus is the apparent absence of parameres, a trait that is only
shared in South American pentatomids by some carpocorines (e.g., Luridocimex, Stysiana), an unde-
scribed genus, and the genus Rhyncholepta (Figure 2.21A), which is currently considered to be a mem-
ber of the Chlorocorini. The mesosternum also was described originally as weakly carinate mesially.
Placocoris Mayr, 1864
This is another Neotropical genus that Rolston et al. (1980) placed in the Pentatomini (section three)
defined by an armed abdominal venter that is apposed by an elevated metasternum (see discussion under
Banasa above in this section). This genus with its two species, P. albovenosus Kormilev and P. viridis
Mayr, however, is significantly different than the other genera in Rolston’s section three. It is extremely
flattened, and each of the hind femora has a double row of spines (a character also possessed by members
of the genus Chrysodarecus). For now, this genus is left in the Pentatomini, but it may deserve a new
tribe or even subfamily.
Platycoris Guérin-Méneville, 1831
There has been some confusion concerning the appropriate name for this Australian genus; this confu-
sion has stemmed from the uncertainty of the dates of publication of Guérin-Méneville’s plates (1831)
and text (1838) for his Voyage Coquille paper, which in turn has played a role in determining the type
species for this genus. To make a long story short, the proper name for this genus is Platycoris, and the
oft-used generic name Hypogomphus Spinola is a synonym. Gross (1976) speculated that this genus, as
Hypogomphus, might belong in the Carpocorini, but McDonald (1995) who revised this genus, again
under the name Hypogomphus, placed the genus in the Halyini.
Riaziana Hasan, Afzal, and Ahmad, 1989
This genus, and its only included species, R. serrata Hasan, Afzal, and Ahmad, described from Pakistan,
originally were not placed in any known tribe. Hasan et al. (1989) discussed its placement, indicating that
it had a superficial resemblance to the halyine genera Sarju and Izharocoris Afzal and Ahmad but ulti-
mately concluded that it was not a member of the Halyini. They also indicated that the serrate anterolateral
pronotal margins might relate it to the Tropicorini (= Pentatomini), but they decided the unarmed abdomi-
nal venter would keep it from being a member of that tribe (although we now know that some members
of the Pentatomini have the abdominal venter unarmed). They left this genus unplaced, and no one since
has worked on this genus. The inadequate original description and poor accompanying figures render any
speculation about the identity and placement of Riaziana difficult, but the shapes of the paramere and
phallus suggest that it might be a member of the Eysarcorini, potentially related to Carbula or Durmia.
Senectius Rolston, 1987
This South American genus, with its only included species, S. metallicus Rolston, is another that Rolston
(1987a) included in his artificial group of seven genera that have an unarmed abdominal venter and an
elongate ostiolar ruga. Rolston (1987a) did not indicate any possible relationship to any other genera. This
genus has metallic green or blue markings and has the mesosternum weakly carinate.
Vitruvius Distant, 1901
Distant (1901b) originally placed this Oriental genus, and its only included species, V. insignis Distant
(Figure 2.24H), in the Tessaratomidae but further indicated that it did not seem to be related to
any known tessaratomine genus. This is where all other workers treated it until Kumar and Ghauri
(1970) transferred it to the Pentatomidae. They did not place it in any known tribe but suggested
that it might deserve a new tribe. Superficially, members of this genus resemble members of the
Phyllocephalinae. The rostrum is shorter than in most pentatomines, but it is still longer than that seen