Parathyginus signifer ( Walker, 1872 )

Ban, Teruaki, 2018, The lygaeoid bug family Heterogastridae (Hemiptera: Heteroptera: Lygaeoidea) from Laos and Thailand, with descriptions of three new species, Zootaxa 4446 (1), pp. 51-67 : 54-55

Parathyginus signifer ( Walker, 1872)

( Fig. 5 )

Heterogaster signifer Walker, 1872: 74 (original description).

Hyginus signifer: Distant (1901: 472) (transferred from Heterogaster ). Bergroth (1918: 114–115) (record).

Parathyginus signifer: Scudder (1957: 167) (as type species of Parathyginus ). Slater (1964: 770) (catalogue, distribution). Péricart (2001: 104) (catalogue, Palaearctic). Cassis & Gross (2002: 207) (catalogue, record, Australia). Ishikawa & Tomokuni (2012: 316) (diagnosis, photo, record, distribution). Ishikawa (2016: 457–458) (catalogue, distribution).

Material examined. Non-types: 2 ♂ (TUA)— THAILAND: 2 ♂, 12°40'14“–30“N, 101°24'50“–52”E, alt. 452– 552 m, Near Rayong, Rayong Prov. , 17.III.2015, Teruaki Ban.

Diagnosis. Recognized among congeners of Parathyginus by the following characters: Body length 4.2 times width across humeri; head and anterior lobe of pronotum shiny brown tinged with green ( Fig. 5 ); antennae brownish yellow, apical third of segments II and III and apical three-quarters of segment IV tinged with brown ( Fig. 5 ); labium nearly reaching mesocoxae; basal angle of hemelytral membrane with brown ( Fig. 5 ); scutellum with white Y-shaped carina at middle ( Fig. 5 ); femora pale yellow, with pale brown annulations ( Fig. 5 ); laterosternites pale yellow.

Distribution. Japan (Ryukyus), Taiwan, China, Philippines, Thailand (Rayong Prov.), Sri Lanka, Australia. New to Thailand.

Biological notes. The specimens were collected from trees of Ficus sp. in mountainous forests with several other heterogastrid and rhyparochromid species.

Figures

FIGURES 1–5. Habitus of Heterogastridae species from Laos and Thailand. 1–2, Artemidorus pressus, male (1), female (2); 3, Dinomachus rhacinus, male; 4, D. sikkimensis, male; 5, Parathyginus signifier, male. Scales: 1.0 mm.