Eupetersia (Nesoeupetersia) yanegai, Pauly, 2012

Pauly, Alain, 2012, Three new species of Eupetersia Blüthgen, 1928 (Hymenoptera, Halictidae) from the Oriental Region, European Journal of Taxonomy 14, pp. 1-12 : 6-10

Eupetersia (Nesoeupetersia) yanegai sp. nov.

( Figs 4-6 )

Etymology

The name is in honour of the apidologist Doug Yanega who discovered the first specimen of this species in the collections of the California University, Riverside, and sent it to me for description.

Material examined

Holotype

Male : THAILAND, Phetchabun, Thung Salaeng Luang NP, 16°37.531’N 100°53.745’E, MT 16-22 Nov. 2006, K.W.N. Yen, T1159A ( YUT); eventually to be returned to QSBG.

Paratype

Female: THAILAND, Phetchaburi, Kaeng Krachan NP, 955 m, Khao Panoen Thung Mt, 12°49’30N 99°21’55”E, 25-26 Jun. 2008, leg. B. Brown, UCRC n° 325766 ( UCR).

Diagnosis

Medium size species (6 mm long) with characteristic orange pronotum and scutum. Clypeus bigibbous, completely orange in female.

Differential diagnosis

Differs from all the other oriental species by orange colouration of the pronotum and scutum.

Description

Male

BODY. length 6 mm. Forewing length 5.5 mm.

COLOUR. Black, pronotum, scutum and scutellum orange. Labrum and mandibles pale yellow. Anterior part of clypeus amber. Legs black except for anterior part of foretibias, which is chestnut brown.

PUBESCENCE. Metanotum with a tuff of long white setae, lateral and posterior sides of propodeum with white short plumose setae ( Fig. 4E ).

STRUCTURE. Head length/width: 0.87 ( Fig. 4C ). Clypeus bigibbous. Vertex well developed ( Fig. 4D ). First and second flagellomeres subequal in length as in other Eupetersia .

SCULPTURE. Head and scutum finely and sparsely punctuate ( Fig. 4C, D ). Dorsal surface of propodeum with irregular carinae, terminating at posterior margin ( Fig. 4E ). Metasomal terga entirely shining and nearly impunctate ( Fig. 4F ). Pygidial area rounded to subquadrate posteriorly ( Fig. 6A ). Genitalia not dissected on the unique male specimen.

Female

Size, colour, pubescence, structure and sculpture. similar to the male, except as follow: antenna with 12 flagellomeres; metasomal tergum 5 with numerous setae and tergum 6 without pygidial plate ( Fig. 6B ); clypeus and metanotum completely orange ( Fig. 5B, D ); labrum brown.

Figures

Fig. 4. Eupetersia yanegai sp. nov., ♂ holotype. A. Dorsal view of habitus. B. Lateral habitus. C. Head, facial view. D. Mesosoma and head. E. Propodeaum. F. Metasoma.

Fig. 5. Eupetersia yanegai sp. nov, ♀ paratype. A. Lateral view of head and mesosoma. B. Head, facial view. C. Head and mesosoma, dorsal view. D. Propodeum. E. Metasoma. F. Geographic distribution.

Fig. 6. Eupetersia yanegai sp. nov. A. ♂, end of metasoma with pygidial plate. B. ♀, end of metasoma without pygidial plate.