Hemipyxis yui Lee and Staines

Lee, Chi- Feng & Staines, Charles L., 2009, Hemipyxis yui, A New Species From Taiwan, With Redescription Of Its Allied Species H. quadrimaculata (Jacoby, 1892) (Coleoptera: Chrysomelidae: Galerucinae), The Coleopterists Bulletin 63 (1), pp. 62-70 : 65-66

Hemipyxis yui Lee and Staines , new species

( Figs. 2 , 6–8 , 12–14 )

General color dark brown ( Fig. 2 ); elytra black with two pairs of transverse white spots at basal 1/4 and apical 1/3 respectively; antenna blackish brown except for three basal antennomeres; abdomen sometimes blackish brown. Vertex smooth and without punctures. Pronotum transverse; minutely and randomly punctured but prominently at base; lateral margin rounded and explanate. Elytral surface shining, finely and randomly punctate; lateral margins subparallel. Male: Length 4.0– 4.3 mm (excluding head), width 2.5–2.7 mm; sternum VII bisinuate posteriorly, median internal apodeme clearly visible, appearing as a suture extending from anterior of sternum VII. Median lobe paired lateral ( Figs. 6–8 ), distinct auricles at basal 1/5; basal foramen very short, narrow; dorsal median process extremely concave at apical 1/3, apical margin truncate, narrow; with paired, lateral twobranched lobe near apex; a prominent ridge extending from apical 1/3 to apex, tapering apically; dorsal lateral sclerite narrow at lateral view; oblique dorsal process with apex rounded at dorsal view; apical median sclerite with teeth at sides. Female: Length 4.3–4.9 mm, width 2.7–3.0 mm; sternite VIII weakly and apically sclerotized ( Fig. 13 ), broad apically, gradually narrowed from apical 1/3 to long narrow base; gonocoxae narrowed anteriorly and posteriorly, each bearing 6–7 setae ( Fig. 12 ); spermatheca with receptacle tubular with no narrowing from head of receptacle to pump; pump curved ( Fig. 14 ), well sclerotized; proximal spermathecal duct long, well sclerotized, coiled multiple times in tight and loose loops ending just before junction of gland valve and distal spermathecal duct.

Type Series. Holotype =: TAIWAN: Pingtung, Dahanshan , 18.VII.2007, leg. C.-F. Lee. Paratypes: 2==, 5RR, same data as holotype; 1=, 1 R, same locality and collector, 24. VI.2007; 3RR, same locality and collector, 25. V.2008; 1=, 2RR: TAIWAN: Taoyuan, Paling, 12. VI.2008, leg. S.-F. Yu.

Etymology. It is named after Su-Fang Yu who is the first person to notice the new species.

Diagnosis. This new species is similar to Hemipyxis quadrimaculata with two pairs of spots on the elytra, but it differs by its more medial position of basal spots on the elytra, the presence of a ridge on the dorsal median process and rounded apex of the dorsal lateral sclerite in the male genitalia, and the more slender gonocoxae with more setae in female reproductive system.

66 Host Plants. Paraphlomis formosana (Labiatae) , Radermachia sinica (Bignoniaceae) .

Distribution. Taiwan.

Figures

Figs. 1–2. Dorsal habitus. 1) Hemipyxis quadrimaculata (Jacoby), dorsal view; 2) Hemipyxis yui Lee and Staines, new species, dorsal view.

Figs. 6–8. Hemipyxis yui Lee and Staines, new species, male aedeagus. 6) dorsal view; 7) lateral view; 8) ventral view.

Figs. 9–14. Female termialia. 9–11) Hemipyxis quadrimaculata (Jacoby); 12–14) Hemipyxis yui Lee and Staines, new species; 9 & 12) gonocoxae; 10 & 13) sternite VIII; 11 & 14) spermatheca.