Porta longirostris, Kondorosy & Varga & Zsalakovics, 2012

Kondorosy, Előd, Varga, Katinka & Zsalakovics, László, 2012, A new species of Porta Distant, 1903 (Hemiptera: Heteroptera: Rhyparochromidae: Ozophorini), Zootaxa 3413 (1), pp. 64-68 : 65

Porta longirostris , sp. nov.

( Fig. 1–2)

Holotype ♂, C. BORNEO, Sg. Boh, leg. Mjöberg, 1925; coll. Dr. D. MacGillavry ( ZMAN).

Description. Colour. Brown; head and thorax darker; basal third of antennal segment IV, and basal third of mid and hind femora, pale stramineous. Vertex behind ocelli and thorax pruinose (except middle of mesosternum), A basal streak between outer rows of punctures on clavus, base of corium continuing in claval furrow, a triangular spot in anterior half of corium, a tiny round submarginal spot on corium close to apex of clavus, a large triangular subapical spot on corium, and apical margin of membrane (wider posteriorly), white ( Fig. 1). Distal part of corium, membrane, extremities, and abdomen, shiny.

Structure. Body surface and vestiture: Body almost entirely glabrous, antennae with very fine decumbent and sparse short erect pubescence. Punctures fine, mostly inconspicuous because of pruinosity; posterior half of pronotum, and prosternum, scutellum, and hemelytra, with fine punctures; clavus with 4 rows of punctures. Head, anterior to ocelli, transversely wrinkled (ventral surface more finely wrinkled).

Head: Antenna very long, segment I about as long as head and pronotum together, exceeding apex of clypeus by more than 80% of its length; apical fourth of first antennal segment strongly thickened (more than 2.5 times as thick as its basal half). Labium reaching end of abdominal sternum 3, first segment reaching prosternum. Thorax: Anterior lobe of pronotum longer (with collar) than posterior lobe; 0.8 times as broad as maximum width of pronotum; disk distinctly swollen. Humeral spine relatively short, about 0.4 times as long as length of scutellum, curved. Fore femur moderately incrassate (diameter more than 2 times as wide as that of hind femur), with about 10 long and 4 short teeth ventrally; fore tibia armed with a series of small teeth ventrally ( Fig. 1). Abdomen: Male paramere as illustrated in Fig. 2.

Measurements (in mm): Body length 9.0, width 1.7. Head length 1.5, maximum width across eyes 1.1, interocular space 0.5, interocellar space 0.1. Lengths of antennal segments: I 3.5, II 5.4, III 4.4, IV 3.1. Length of labium 5.6; labial segments: I 0.7, II 1.2, III 2.1, IV 1.6. Pronotum: length 1.4, width of pronotal collar 0.9, maximum width of pronotum 1.7. Length of scutellum 1.0, width 0.9. Length of claval commissure 2.2. Legs (lengths of parts): Fore femur 3.7, tibia 3.6, tarsus 1.2. Mid femur 3.3, tibia 3.7, tarsus 1.2. Hind femur 4.2, tibia 5.4, tarsus 1.7.

Discussion. Porta longirostris sp. nov. has the longest labium within the genus, reaching abdominal sternite 3; the labium of all other species reaches only to the mesosternum. The most similar species is apparently P. illustris Slater & Zheng, 1985 , a species of which we have examined photographs of the holotype ( Fig. 3 ). The males of both species (unlike the others) share the thickened fore femur (less pronounced in P. illustris ) and serrate fore tibia characters. Other characters shared by these two species are the swollen anterior lobe of the pronotum (only slightly in P. illustris ), and the thickened apex of antennal segment I (more strongly in P. longirostris sp. nov.). P. longirostris is the only species of the genus having a bicolorous antennal segment IV, and a large triangular subapical corial spot, leaving corial apex narrowly dark. All the other known species have a trapezoidal spot with more or less parallel anterior and posterior margins, leaving a dark apical corial portion almost as long as the subapical spot (as in Fig. 3 ).

P. gracilis and P. longipes Slater & Zheng, 1985 differ from P. longirostris sp. nov. and P. illustris in the following characters: fore femora gracile, armed with 2–5 tiny teeth only; posterior lobe of pronotum at least 1.5 times as long as anterior lobe; anterior lobe not swollen; humeral spine at least 0.7 times as long as scutellum.

Figures

FIGURE 3. Porta illustris Slater & Zheng, 1985, dorsal and lateral views, labels.