Duadicus namyatovae, Wang & Liu & Cassis, 2013

Duadicus namyatovae View in CoL sp. nov.

( Figs 1a,b View Fig ,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) GoogleMaps .

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) GoogleMaps .

Diagnosis D. namyatovae is recognised by the following combination of characters: dorsum pale brown; lateral margin of pronotum weakly arcuate ( Figs 1a View Fig , 2b View Fig ), almost straight, pale brown; pronotal horns weakly projected, with apex yellowish brown; two brown spots along basal margin of scutellum ( Fig. 1a View Fig ), with slightly purplish tinge; connexiva with less than one-half of segments V-VII pale brown anteriorly.

Description Male ( Fig. 1a,b View Fig ). 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 View Fig , 2a View Fig ); 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 View Fig ); pronotal horns oriented laterally. Scutellum: flat, width greater than length. MTG: almost rectangular, with lateral margin rounded ( Fig. 2c View Fig ). 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 View Fig ) 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 View Fig ) nearly ‘L’ shaped, with angle more than 90° with few spine-like processes near apex, slightly upturned; apex truncate, expanded ( Fig. 4c View Fig ); vesica ( Fig. 4d,e View Fig ) ‘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 View Fig ).

Host plants

Specimens were collected from Melaleuca cuticularis and M. viminea ( Myrtaceae ) ( Fig. 8b View Fig ).

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 View Fig , 2b View Fig , 3b View Fig ), and the different colour patterning of the dorsum (see Fig. 1 View Fig ).