Umbrageocoris boonei, Kóbor, 2022

Kobor, Peter, 2022, A redefinition of Umbrageocoris with new species and new combinations (Heteroptera, Lygaeoidea, Geocoridae), Deutsche Entomologische Zeitschrift 69 (2), pp. 139-150 : 139

Umbrageocoris boonei sp. nov.

Figs 7 , 22 , 27

Material examined.

Holotype, m (BPBM): " Thailand / Chiangmai Prov. : / Chiangmai / (Arboretum), 300m / 12. VI. 1965 // P. D. Ashlock / Collector / BISHOP Mus. // U. S.- Japan / Coop. Sci. / Program".

Paratypes: 2 m (BPBM): " Laos: Sedone Prov. / Paksong , 18. V. 1965 // P. D. Ashlock / Collector / BISHOP MUS." ; 1 m (BPBM): " Laos: Ban Theoung / 18km NW from Xieng / Khouang , 1035 m / 2-6. VIII. 1960 // Sweeping grasses // R. F. Leech / Collector / BISHOP" ; 1 m (BPBM) " Thailand / Chiangmai Prov.: / Doi Suthep / / 12. VI. 1965 // P. D. Ashlock / Collector / BISHOP Mus. // U. S.- Japan / Coop. Sci. / Program" ; 1 m (BPBM): " Thailand: Tang Kao / Chiang Mai Prov. / 10. VI. 1965 // P. D. Ashlock / Collector / BISHOP Mus. // U. S.- Japan / Coop. Sci. / Program"; 1 f (BPBM): Thailand / Bangkok / June 3, 1965 // P. D. Ashlock / Collector / BISHOP Mus." ; 1 m (PCPK): " LAOS: Sedone Prov. / Paksong , 18. V. 1965 // P. D. Ashlock / Collector / BISHOP MUS." .

Description.

Colouration: Head ochraceous with dark brownish irregular spot at base of eye stalks posteriorly. Antennomere I ochraceous with apex irregularly brownish; antennomeres II and III entirely dark brownish; antennomere IV dark brownish with apex ochraceous. Labiomeres uniformly ochraceous. Thorax. Pronotum ochraceous with dark brownish punctation, a dark brownish or dark fuscous transversal band across callosities and irregular infuscate spot of various extent posteriad to callosities. Scutellum entirely dark brownish or blackish. Hemelytra semi-hyaline, ochraceous with dark brownish punctation and an irregular infuscate spot at apical half of corium. Thoracic pleurites and sternites dark brownish except ochraceous prosternal collar, supracoxal lobes and peritreme. Abdomen dark brownish, undecorated.

Structure: Head. Eyes slightly stylate; ocular sulcus complete, but slightly visible, rather indistinct in apical half. Ocelli situated near ocular sulci, closer to each other than to compound eyes; ratio of ocellar distance to eye ocellus distance: 1: 1.16. Dorsum of head with median longitudinal furrow extending from apex of clypeus to base of head. Relative lengths of antennomeres: 1.00: 2.40: 1.82: 4.36. Relative lengths of labiomeres: 1.00: 0.57: 0.81: 0.98. Thorax. Pronotum trapeziform with lateral margin not constricted; integument densely and deeply punctate at anterior margin and narrow pronotal callosities; pronotum length to basal width: 1.00: 1.35. Scutellum with integument densely punctate except slightly bulging, complete trifurcate carina; scutellum length to width: 1.00: 1.07. Corium submacropterous, membrane slightly surpassing apex of abdomen; corium punctate along margin of clavus, along Cu and between M-R and costa at apical half; exocorium uniformly narrow at entire length; membrane wrinkled. Thoracic sternites and pleurites densely punctate except narrow prosternal collar, supracoxal lobes and peritreme. Peritreme bulbous, situated ventrolaterally; dorsal flange with distinct peritremal surface; evaporatorium restricted to surroundings of peritreme. Abdomen. Abdominal venter with sparse, decumbent pubescence; integument of abdominal sternites III-VII corrugate dorsolaterally.

Measurements (holotype). Body length: 3.11; head length: 0.62; head width: 1.51; lengths of antennomeres I-IV: 0.14-0.33-0.25-0.60; lengths of labiomeres I-IV: 0.47-0.27-0.38-0.46; pronotum length: 0.83; pronotum width: 1.39; scutellum length: 0.72; scutellum width: 0.79.

Diagnosis.

U. boonei gen. nov. resembles both subspecies of U. maai in colouration and markings. The new species can be distinguished from other representatives of the genus by lacking an impunctate “collar” on the pronotum and its highly extended trifurcate carina on the scutellum.

Distribution.

The species is known from continental Indomalaya (Laos and Thailand) from the following ecoregions: Kayah-Karen montane rainforests, Luang Prabang montane rainforests, Southern Annamites montane rainforests, Chao Praya freshwater swamp forests, Indochina mangroves.

Figures

Figures 5 - 10. Exoskeletal characters of Umbrageocoris: peritreme of metathoracic scent efferent apparatus of U. kondorosyi (5), U. maai maai (6), U. boonei sp. nov. (7), U. malipatili sp. nov. (8), U. elegantulus (9), and U. woodwardi (10) (images not to scale).

Figures 19 - 24. Dorsal habitus of Umbrageocoris species: 19. U. kondorosyi (holotype, HNHM), 20. U. maai maai (holotype, BPBM), 21. U. maai timorensis (holotype, BPBM), 22. U. boonei sp. nov. (holotype, BPBM), 23. U. malipatili sp. nov. (holotype, MNHN), 24. U. woodwardi (SEMC) (scale bar = 1 mm for all images).

Figures 27 - 28. Distribution map of Umbrageocoris species: 27. Indomalayan species (U. maai ssp. and U. boonei sp. nov.), 28. Australasian species (U. elegantulus, U. kondorosyi, U. malipatili sp. nov. and U. woodwardi).