Sadoletus laosensis Ban 2018, sp. nov.
Creators: name: Ban, Teruaki
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Heterogastridae
Sadoletus
Sadoletus laosensis

description: Sadoletus laosensis sp. nov.
(Figs. 6–7, 14, 17, 20–24)
Type Materials. Holotype: ♀, LAOS: 20°37'N, 102°00'E, alt. 837 m, Lak 11 Waterfall, 11 km South-east From Oudomxay, Oudomxay Prov., 12.X.2009, Teruaki Ban (TUA). Paratypes: LAOS: 1 ♀, Same locality as for holotype, 4.X.2009, Genki Ôishi leg. (TUA); Same date as for holotype, 3 ♂ 3 ♀, Teruaki Ban (TUA).
Diagnosis. Recognized among congeners of Sadoletus by the following characters: head, anterior lobe of pronotum and basal half of scutellum black (Figs. 6, 7); labium exceeding posterior margin of prothorax (Fig. 14); posterior lobe of pronotum pale yellow, with 2 pale brownish longitudinal markings (Figs. 6, 7); corium white in basal two-thirds and dark brown in apical third, with pale brown markings around inner angle; clavus white (Figs. 6, 7); femora and tibiae generally pale yellow, profemur with 2 spines; abdominal sterna reddish brown; posterior margin of sternite VI weakly sinuate in female (Fig. 17); posterior margin of pygophore and cuplike sclerite not fused (Fig. 20); paramere acute at apex (Fig. 21).
Description. Female (holotype): Short decumbent setae on body silvery. Punctures on pronotum, scutellum, and corium brown. Head (Fig. 7) black. Clypeus yellowish brown. Antenna generally brownish yellow, apical three-quarters of segment IV tinged with brown. Labium brownish yellow; basal three-quarters of segment I and apex of segment IV brown. Pronotum (Fig. 7) black in anterior lobe, anterior margin reddish brown; posterior lobe of pronotum pale yellow, with darker sublateral stripes (Fig. 7). Venter of thorax black to dark brown for the most part; posterior margin of metepimeron brownish yellow; peritreme yellowish. Scutellum (Fig. 7) black to dark brown in basal half and yellowish in apical half; apical half of scutellum with pale yellowish white longitudinal stripe along meson. Corium (Fig. 7) pale in basal two-thirds and dark brown in remaining part, with small brown marking around inner angle; clavus pale; hemelytral membrane hyaline, with pale brown transverse marking at middle. Coxae pale reddish brown; trochanters, femora and tibiae pale yellow; metafemur and metatibia with brown annulations; tarsomere I pale yellow, tarsomeres II and III pale brown. Abdomen (Fig. 14) reddish brown; posterior margin of segments V and VI, middle of sternites VII and VIII dark brownish yellow; each laterotergite brown.
Body length (Fig. 7) approximately 3 times width across humeri. Head (Fig. 7) 1.8 times as wide as its length, covered with both rough and fine punctures; tylus tumid upwards; clypeus weakly projecting anteriad; juga with decumbent setae. Eyes occupying nearly half area of head in lateral view, not reaching anterior margin of pronotum. Antennae covered with suberect setae; proportional lengths of segments I to IV 1.0: 1.5: 1.3: 2.2. Labium slightly exceeding posterior margin of prothorax, not reaching mesocoxae; proportional lengths of segments I to IV 1.2: 1.3: 1.1: 1.0.
Pronotum (Fig. 7) slightly more than 1.4 times as wide as its length, nearly trapezoidal, lacking collar, and with lateral margin of anterior lobe weakly serrate; posterior lobe 1.5 times as long as anterior lobe, slightly more convex than anterior lobe, covered with dense punctures; posterior margin almost straight. Venter of prothorax, mesepisterna and metepisterna covered with decumbent setae. Scutellum (Fig. 7) triangular, weakly tumid transversely in basal half, covered with decumbent setae. Hemelytra (Fig. 7) exceeding apex of abdomen; apical margin of corium as long as claval suture. Profemur moderately expanded, armed with 2 spines ventrally at about apical third, the basal spine larger; tibiae and tarsi covered with long erect setae.
Abdomen (Fig. 7) wider than hemelytral width; sternum entirely covered with decumbent setae. Ovipositor (Fig. 17) straight, reaching posterior margin of sternite VI, approximate oviposital length 0.45 mm; the two hemiventrites of the medially completely bisected sternite VII are short therefore posterior margins of sternites III– V straight, posterior margin of sternite VI weakly sinuate (Fig. 17).
Spermatheca (paratypes) as in Fig. 24.
Male (paratypes): resembles female in general appearance. Body (Fig. 6) evidently narrower; pygophore (Fig. 20) nearly spherical in dorsal view, covered with suberect setae; maximum width of dorsal sinus of posterior aperture more than one-quarter as wide at middle as pygophore, without collar along anterior margin; posterior margin of pygophore and cuplike sclerite not fused; paramere (Fig. 21) narrow, twisted at basal third, acute at apex, sensory processes projecting laterally; phallosoma (Figs. 22, 23) nearly twice as long as its width in ventral view, wrinkled at apical margin.
Measurements. [♂ (n=3) / ♀ (n=5), value for holotype female in parentheses]. Body length 4.3–5.0 / 4.8–5.2 (5.2); body height between coxae and dorsum 1.1–1.25 / 1.25–1.35 (1.25); head length 0.8–0.95 / 0.75–1.0 (0.75), head width across eyes 1.2–1.25 / 1.25–1.35 (1.35); length of antennal segments I–IV respectively 0.35–0.4 / 0.33– 0.38 (0.38), 0.65–0.69 / 0.53–0.65 (0.58), 0.6–0.65 / 0.5–0.63 (0.5), 0.78–0.93 / 0.83–0.88 (0.83); length of rostral segments I–IV respectively 0.38–0.43 / 0.4–0.43 (0.4), 0.43–0.48 / 0.38–0.48 (0.43), 0.35–0.36 / 0.33–0.38 (0.35), 0.3–0.31 / 0.31–0.35 (0.33); mesal pronotal length 1.1–1.25 / 1.1–1.3 (1.25); posterior pronotal width 1.38–1.5 / 1.5–1.8 (1.75); mesal scutellal length 0.75–0.83 / 0.8–0.95 (0.95); basal scutellal width 0.75–0.85 / 0.88–1.0 (1.0); hemelytral length 3.2–3.38 / 3.25–3.5 (3.5); maximum width across hemelytra 1.15–1.38 / 1.58–1.85 (1.85).
Distribution. Laos (Oudomxay Prov.).
Etymology. The species epithet is the Latin adjective “ laosensis ” referring to type locality, Laos.
Remarks. This new species is most similar in general appearance to S. bakeri Bergroth, but it can be distinguished from the latter by a combination of the following characters: antennal segment II 1.5 times longer than segment I (vs. antennal segment II twice longer than segment I); labium exceeding posterior margin of prothorax slightly, not reaching mesocoxae (vs. reaching mesocoxae); coxae pale reddish brown (vs. coxae black); ground color of femora and tibiae pale yellow (vs. femora and tibiae yellowish brown).
Biological notes. The specimens were collected on fruiting trees of Ficus sp. in the forest along a mountain stream with several other heterogastrid and rhyparochromid species.
description: Published as part of Ban, Teruaki, 2018, The lygaeoid bug family Heterogastridae (Hemiptera: Heteroptera: Lygaeoidea) from Laos and Thailand, with descriptions of three new species, pp. 51-67 in Zootaxa 4446 (1) on pages 56-57, DOI: 10.11646/zootaxa.4446.1.4, http://zenodo.org/record/1437384