Pygoplatys (Odonteuchus) rideri, Magnien, 2008

Magnien, Philippe, 2007, New species and synonymyingenus Pygoplatys Dallas, 1851 (Heteroptera, Tessaratomidae), Nouv. Revue Ent. 24, No. 2, pp. 113-124 : 118-121

Pygoplatys (Odonteuchus) rideri n.sp.

HOLOTYPE <$: PhilippinesIslands, Camarines Sur, Mount Iriga 500-600 m, 17- IV- 1962; H. M. Torrevillas, Collector( BPBM) . Paratypes: 2 SS, same origin,14 & 21 -IV-1962 ( BPBM) : 1 <$, Philippines Islands, CamarinesSur, MountIzarog 500-600 m, 24-IV & 8/ 12-V-1963, H. M.Torrevillas,Collector( DA R) , 1 S, id ( PHM) . 1 Ş, 19 - IV- 1962, Camarines Sur, Mt Iriga , Philippines 500-600m; H. M. Torrevillas,Collector ( BPBM) . 5 ŞŞ, 20-IV / 22-V-1962, CamarinesSur, Mt Izarog , Philippines,700-1600; m H. M. Torrevillas, Collector( BPBM) , 1 Ş, id( MNHN) , 1 Ş, id( DAR) , 1 Ş, id ( PHM) .

Other specimens: 1 S, 1?: PhilippinesIslands, Mountainprovince, IfugaoMayoyao , 1000- 1500 m, 30-VI-1966; H. M. Torrevillas, Collector( BPBM) ; 1 Ş, InselMasbate , Aroroy, Philippines, leg. G. Böttcher; PygoplatysalcesTaeuber /. /. ( ZSMC) ; 1 Ş, Insel Masbate, Aroroy, Philippines, leg. G.Böttcher;Taeuber coll.B. M. 1949-474( BMNH) ; 1 Ş, Philippines Islds, Basilan I., Maloong, vend. M.E.Walsh;Taeubercoll.B. M. 1949-474 ( BMNH) ; 2 S S withoutdata(onecomingfromtheDistantcoll.)( BMNH) .

Note. I did not include in the paratypes the specimens from the Mountain province, Masbate and Basilan Island, nor the specimens from the BMNH lacking data. This is due partly to the poor condition of some of the specimens and partly to the fact that they show some differences with the series from Camarine Sur. The most evident of which is in the coloration, those specimens being uniformy tawny, whereas typical P. rideri specimens are bicoloured. This could result from immaturity, but the odds are not in favour of this hypothesis, considering the number of specimens. Furthermore, other small discrepancies can be found, for example, the head and the lanceolate apex of the scutellum being shorter in the specimens from Masbate than those of the typical series. On the other hand, no significant difference can be found in the genitalia. Subspecific status could have been considered, if it was not for the fact that two of the specimens came from the North of the typical region, and other from the South. This seems to defeat the possibility of geographic isolation, and consequently, the subspecies status. More specimens from these localities are needed to solve this problem, and in the meantime, it does not seem useful to give them a particular status.

Description.- Habitus: Plate 11: C (male), D (female).

Bicoloured, overall shiny pitch brown, except hemelytron which are nearly entirely light brown, reddish-brown on inner part of corium; head somewhat paler at apices of juga, distal half of 4" antennae segment reddish-brown: membrane of hemelytron yellowish; ventral side pitch brown, shiny; coxae, trochanters and apex of stemal process of paler hue, reddish, spiracles black; legs pitch brown, tarsi lighter, yellowish-brown.

Head: juga narrow, wider and rounded at apices, each with a tooth just in front of each eye, antenniferous tubercles visible from above, clypeus shorter than and completely enclosed in the juga; 1 st antenna segment not reaching apices of juga, 2 m and 3 m segments cylindrical, 3 m somewhat shorter than the 2hh 4th fusiform and not more than 10 % longer than 2 m; pilosity dense, length of hairs about one fourth of segmental diameter; rostum short, slightly surpassing anterior Qoxae

Pronotum: humeral processes extending well beyond lateral margins of abdomen, their margins subparallel, slightly projected anteriorly, obliquely truncated, extending slightly beyond anterior margin of pronotum, reaching to about middle of eyes; width of pronotum, humeral processes included, about 65 % of habitus length; anterior calli smooth, slightly marked; lateral margins transversally wrinkled; punctation on disk rough and irregular; stemal process long, apex blunt, surpassing the anterior margin of fore coxae; distal apices of femora fitted with a spine on either side of tibia insertion; first segment of tarsi swollen, with a brush of adhesive hairs on the ventral surface, second and third segments cylindro-conical, second very short.

Scutellum triangular with a lanceolate, grooved apex.

Hemelytron: punctation fine and regular; membrane with four basal cells, veins strong, parallel.

Abdomen: male: posterior margin of pygophore in normal position somewhat surpassing the posterior margins of 7 m female: 7 m laterotergites extending posteriorly, in line with the segment; teeth of the 9m the 8m with two distinct teeth, shorter; ventral side finely granulated.

Genitalia (cf fig 8 — ll). (Ê: pygophore (fig. 8) widening posteriorly, posterior margin polygonal, with a very shallow V-shaped medial indentation, opening with a straight tooth just anterior to sensorial lobe of paramer on each side; apophysis of paramere (fig 9) regularly curved inwards, not triangular, sensorial lobe small, fitted with very long setae. Phallosoma (fig 10) fitted with two sclerotized plates dorsally protruding, conjunctiva fitted with two pairs of processes, one sclerotized in antero-ventral position, stylet dissymetrically bifurcated (10a), and the other membranous in postero-dorsal position; vesica very long, ejaculatory reservoir strongly curved at base, S-shaped in the middle, and strongly tapering at the apex. Q: (fig 7): external genitalia as in the other species of genus (see MAGNIEN et al., 2008). Spennatheca (fig. 13): apical receptacle ovoid connected to the intermediate part (pumping region) by long distinctly tubular neck curved at right angle; intermediate part with proximal and distal flanges; spermathecal duct bipartite: posterior part wide and folded, lanceolate, anterior part long and thin, about as long as posterior part,

Measurements. (mean (min max)): male: length: 26,8 mm (25,4-28,5) width including humeral processes: 16,9 mm (16,5- 17,4) — length of antennae: 10,0 mm (9,6- 10,3). Female: length: 30,2 mm (27,2-31,8) — width including humeral processes: 18,6 mm (16,1 -20,0) — length of antennae: 10,2 mm (9,6- 10,6).

Derivatio nominis: this species is dedicated to our colleague David Rider, who is doing a tremendous job to improve the knowledge about Pentatomoidea , by his own work as well as by the help he gives other researchers, and who gave me the opportunity to discover this new species. Distribution: from the specimens studied it appears that this species occurs throughout most of the Philippines, from Luzon to Mindanao Islands.

Host plant unkown..

Discussion. Regarding the two new species in the subgenus Odontoteuchus , they are quite easy to separate from all other species by the unique shape of their humeral processes in the subgenus. The characters which can be used to separate the two new species are as follows: pluotae n. sp. is rather stout and small, ríderí n. sp. slender and large; pluotae n. sp. is nearly unicolourous dark, rideri n. sp. is bicolorous. The fourth segment of the antennae is much longer than the second for pluotae n. sp., but they are subequal for rideri n. sp.. The denticulation on the apex of female abdomen in pluotae n. sp. is reduced, the corresponding denticulation in rideri n. sp. is longer. The male genitalia also varies between the two species, the tooth on each side of the aperture of the pygophore is straight in rideri n. sp.; it is curved in pluotae n. sp.. The sensorial lobe of the paramer is much more protruding in rideri n. sp. than in pluotae n. sp., the shape of the apophysis is different (fig. 5, 9). The shape of the sclerotized ventral processes of the conjunctiva are also somewhat different, being less symétrie in rideri n. sp. than in pluotae n. sp.. Concerning the female genitalia, the main differences lie in the intermediate part (pump region) of the spermatheca, the proximal flange is very reduced in pluotae n. sp., while in rideri n. sp the anterior and posterior flange are nearly the same size. Also the relative length of anterior part versus posterior part of ductus varies; they are about equal in rideri n. sp., and the anterior part is much shorter in pluotae n. sp.