Mitripus bovillus (Distant)

Bianchi, Filipe Michels, Krein, Verônica, Rider, David & Grazia, Jocelia, 2021, Finding Padaeus bovillus (Hemiptera: Pentatomidae): A Phylogenetic Placement and the Description of Its Sister Species, Zoological Studies 60, No. 11, pp. 1-13 : 8-11

Mitripus bovillus (Distant) comb. n.

( Figs. 1–5, Table 3 )

urn:lsid:zoobank.org:act:6910E7CD-BB6F-4222-A9E2- F2E155BE3C59

Padaeus bovillus Distant, 1900: 689 , 690 (original description); Kirkaldy, 1909: 69 (catalog); Rolston, 1976: 7 (revision).

Material examined: Type Material: Holotype female: COSTA RICA: Tuis , Cartago, Terralba 650 m., A. Pittier, BRIT. MUS. ( NHMUK) TYPE HEM/050 . COSTA RICA: 1m #, Costa Rica, Prov. Heredia, F. La Selva , 3km S Pto. Viejo, 10°26'N 84°01'W / 25.III.1987, H. A. Hespenheide / D. A. Rider Collection ( DARC) ; 1f #, Costa Rica, Pr. Heredia, Puerto Viejo, Finca La Selva / R J. Marquis, coll. No. I, 11.IX.1986 / Piper aricianum (?) / NMNH ; 1f #, Collection Schild-Burgdorf, Costa Rica, San Carlos / Padaeus bovillus Distant / NMNH ; 1m # / Costa Rica: Cartago Prov., Mon. Nac. Guayabo , 22.XII.1994 / M. J. Tauber, C. A. Tauber, P. J. Tauber Collectors / UC Berkeley EMEC 1240641 . PANAMA: 1m #, 1f #, Panama: Bocas Del Toro Pr. 3km. n. Continental Div. on Fortuna Hwy 925 m., 13.VII.1996, A. R. Gillogly / EGER / Sibaria n. sp. Det. J. E. Eger, 1997 ( UFRG) .

Diagnosis: Mitripus bovillus may be distinguished from M. convergens and M. legionarius by the humeral angles which are developed laterally as stout spines; from Mitripus acutus by the clypeus slightly longer than mandibular plates, anterolateral margins of pronotum entirely smooth; and from Mitripus seclusus by the humeral angles depressed anteriorly and the shape of parameres ( Fig. 3).

Redescription: Coloration: Dorsal surface ochraceous with black punctures, giving an overall dark brown matte aspect; head and thorax with ochraceous punctures; antennae ochraceous, antennomeres I–II with irregular dark brown spots, antennomeres III–IV dark on apical 3/4, and antennomere V dark brown on apical half. Scutellum dark brown on base. Connexivum blackish, middle third ochraceous. Ventral surface yellowish-ochraceous; abdomen impunctate. Legs ochraceous with brown spots on femora and tibiae; apex of each tarsomere brownish.

Head: Clypeus slightly longer than mandibular plates, rounded apically. Head tapering to apex, lateral margins of mandibular plates sinuous, concave near eyes. Ocelli red or yellow. Antennomere proportions: I <II <III <IV = V. Anterior margins of bucculae truncated, each with sharp projection, posterior margins evanescent. Rostrum reaching metacoxae.

Thorax: Anterolateral margins of pronotum smooth on anterior half, anterolateral angles developed as small yellowish-ochraceous spines, projected laterally. Each humeral angle produced laterally as a black, stout spine, somewhat depressed anteriorly. Pronotal cicatrices brownish, with ochraceous spot posterior to mesial angles. Basal angles of scutellum with small fovea. Apex of radial vein with a small ivory dot at endocorium. Hemelytral membrane fumose, with veins subparallel. Evaporatoria each extending halfway from ostiole to metapleural lateral margin, and present on posterior margin of mesopleuron; surface impunctate, with gyrification near ostiole; lateral fold present; peritreme spout-like.

Abdomen: Posterolateral angles of connexiva developed as tiny black spines. Posterolateral angles of urosternite VII slightly projected as spines. Spiracles concolorous with abdominal disc.

Male genitalia: Pygophore ( Fig. 3 K – M): in dorsal view, pygophore trapezoidal; genital cup not well exposed; posterolateral angles of pygophore developed as rounded projections; median projection of dorsal rim short. Dorsal rim interrupted by diagonal depressions flanking median projection of dorsal rim, lateral margins slightly sinuous, discontinuous near median projection of dorsal rim; superior process of dorsal rim exposed. Transverse ridge slightly concave; ventral rim concave with triangular projection medially. In posterior view, genital cup opening ellipsoid; dorsal rim concave, smooth; superior process of dorsal rim truncate, bladelike.; transverse ridge concave medially, U-shaped; inferior layer of ventral rim tumescent laterally, medial triangular projection bent inward into genital cup. In ventral view, ventral rim biconcave, triangular projection medially; posterolateral angles produced, rounded. Tenth segment: Posterior margin trapezoidal with setae; disc smooth; tubercles on basal third slightly developed. Parameres ( Fig. 3 N – Q): In dorsal and ventral views, each with basal apodeme smaller than crown; stem as long as crown; crown bending outward nearly at a 45° angle. Basal process of paramere not developed, with a few setae; apical process of paramere enlarged basally, tapering to truncate apex. In mesial and lateral views, apical process of paramere stout, triangular, with scale-like structures on its outer surface. Phallus ( Fig. 3 R – T): phallotheca tubular, slightly constricted basally; ventral basal processes of phallotheca quadrangular; dorsal processes of phallotheca hook-like, bent ventrally in about a right angle, not surpassing expanded conjunctiva; vesica process spout-like; conjunctiva lacking processes; ductus seminis distalis short, not exposed out of phallotheca.

Female genitalia: In posteroventral view ( Fig. 4 B), gonocoxites VIII with shallow punctures concolorous with ochraceous disc; surface flat; mesial margins concave, exposing a scletorized area of gonapophyses VIII, apex of each mesial margin squared, with brown spot. Laterotergites VIII with black margins; apex of each developed as a spine. Gonocoxites IX trapezoid, about three times wider than long, anterior, posterior and lateral margins straight. Laterotergites IX rounded apically, mesial margins forming a right angle, lateral margins convex, posterior margins projected, slightly surpassing tergite VIII; segment X rectangular. Internal genitalia: Ring sclerites elliptical; thickening of vaginal intima triangular posteriorly, rounded anteriorly; ductus receptaculi proximally slightly enlarged near vesicular area, shorter than vesicular area; median wall of vesicular area straight, slightly enlarged at apex; ductus receptaculi distally straight, shorter than pars intermedialis, with rounded dilation apically; proximal and distal annular flanges convergent; pars intermedialis convoluted, sclerotized basally, apical half straight, membranous; capsula seminalis thumb-like, dilated anteriorly.

Distribution: Mitripus bovillus is distributed throughout southern Central America, with records from Costa Rica and Panama ( Fig. 5).

Comments: Distant (1900) originally speculated that Padaeus bovillus resembled Sibaria armata . More recently, Rolston (1976) called attention to the “arcuately truncate termination of the bucculae well before the distal end of the first rostral segment” that should remove P. bovillus from Padaeus and suggested that the species was close to Mormidea , and that further investigation was needed. A phylogenetic hypothesis previously placed Padaeus within Euschistus group, close to Proxys Spinola , although Padaeus bovillus was not sampled (Bar„ o et al. 2020).