Duadicus namyatovae Wang & Liu & Cassis 2013, sp. nov.
Creators: name: Wang, Xiao-Jing
name: Liu, Guo-Qing
name: Cassis, Gerasimos
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Acanthosomatidae
Duadicus
Duadicus namyatovae

description: Duadicus namyatovae sp. nov.
(Figs 1a,b,2,4)
http://zoobank.org/urn: lsid: zoobank.org:act:55171906 -CA3C-4305-AC5A-8382CDD91B4E
Specimens examined
HOLOTYPE: male, AUSTRALIA: Western Australia, poison Creek Beach, Cape Arid National Park, sea level, 33°54.2484′S 123°21.1153′E, 25 November 1999, R. T. Schuh, G. Cassis and R. Silveira (00002841) (AM).
PARATYPES: 2♂♂, AUSTRALIA: Western Australia, 2.3 km E of Esperance on Fisheries Road, 10 m, 33°48.6225′S 131°56.0028′E, 23 November 1999, R. T. Schuh, G. Cassis and R. Silveira (00002843-00002844) (AM).
Diagnosis D. namyatovae is recognised by the following combination of characters: dorsum pale brown; lateral margin of pronotum weakly arcuate (Figs 1a, 2b), almost straight, pale brown; pronotal horns weakly projected, with apex yellowish brown; two brown spots along basal margin of scutellum (Fig. 1a), with slightly purplish tinge; connexiva with less than one-half of segments V-VII pale brown anteriorly.
Description Male (Fig. 1a,b). Colouration. Head: mostly medium brown, with medium brown markings dorsally; pale brown between inner margin of eye and ocelli, without markings; pale to medium brown ventrally, without markings. Eyes: black with purplish tinge anteriorly. Antennae: AI medium brown with reddish tinge; AII-AIII medium brown, with apex of AII and half of AIII reddish brown; AIV-AV brown. Labium: LI-LII pale brown; LIII medium brown; LIV black. Pronotum: anterior part medium brown and posterior part pale brown dorsally, with medium brown markings; callus pale to yellowish brown; lateral margin of pronotum pale brown; base of pronotal angle medium brown, with apex yellowish brown. Scutellum: yellowish to medium brown at base, with medium brown markings; two brown spots along basal margin, with slightly purplish tinge; black markings medially; pale yellow at apex, with minute black markings. Thoracic pleura: pale to yellowish brown with reddish markings. MTG: yellowish brown. Hemelytra: pale brown with dark markings; irregular purplish tinge along apical margin of corium; membrane almost transparent, sometimes with brown tinge at base. Legs: coxae pale brown; femora pale brown with apex medium brown; tibiae reddish brown laterally, medium brown medially; others as in generic description. Abdomen: connexiva medium brown; less than one-half of segments V–VII pale brown anteriorly, without markings; abdominal spine pale brown; venter as in generic description. Vestiture. Mostly as in generic description. Antennae: setae on AI least; AII-AIII moderate distribution, more than AI; AIV-AV mostly dense. Labium: as in generic description. Legs: uniformly pale brown; tibiae and tarsi mostly dense. Abdomen: as in generic description. Structure. Head and Eyes: as in generic description. Antennae: AI longest, much passing anterior margin of head (Figs 1a,b, 2a); AII slightly longer than AIII and shorter than AIV; AIV almost as 3/4 long as AI; AV shortest. Labium: as in generic description. Pronotum: callus almost rectangle; lateral margin of pronotum sinuate, arcuate and weakly upturned (Fig. 2b); pronotal horns oriented laterally. Scutellum: flat, width greater than length. MTG: almost rectangular, with lateral margin rounded (Fig. 2c). Legs: metafemora weakly broader and longer than fore- and mesofemora; tarsi narrow, tarsal segment I almost as long as segment II. Abdomen: as in generic description. Male genitalia: pygophore (Fig. 4a) a little broader than long, with two processes mediolaterally; posterolateral angle rounded and short, situated higher than notch of posteroventral rim and dense long setae; lateral margin near apex of posterolateral angle weakly sinuated; posterodorsal rim sinuated, with a medial notch and few very short setae; paramere (Fig. 4b) nearly ‘L’ shaped, with angle more than 90° with few spine-like processes near apex, slightly upturned; apex truncate, expanded (Fig. 4c); vesica (Fig. 4d,e) ‘C’shaped, strongly sclerotised; lateral conjunctival lobe with two branches dorsal, slightly sclerotised medially and united dorsally.
Female. Unknown
Distribution
All specimens of this species have been collected from two localities in Western Australia (Fig. 7).
Host plants
Specimens were collected from Melaleuca cuticularis and M. viminea (Myrtaceae) (Fig. 8b).
Etymology
This species is named after Anna Namyatova, who gave greatly assisted one of us (XJW) while studying in Australia.
Remarks
D. namyatovae can be separated from D. pallidus by its shorter pronotal horns and different colouration at their apices (cf., Fig 1a,c,e, 2b, 3b), and the different colour patterning of the dorsum (see Fig. 1).
description: Published as part of Wang, Xiao-Jing, Liu, Guo-Qing & Cassis, Gerasimos, 2014, Systematic study of Duadicus Dallas, 1851 (Insecta: Hemiptera: Heteroptera: Acanthosomatidae: Blaudusinae: Blaudusini), including the description of a new species from Western Australia, pp. 42-52 in Austral Entomology 53 (1) on pages 44-46, DOI: 10.1111/aen.12046, http://zenodo.org/record/15305204