Xenopolynema Ogloblin 1960

TRIAPITSYN, SERGUEI V. & BEREZOVSKIY, VLADIMIR V., 2007, Review of the Oriental and Australasian species of Acmopolynema, with taxonomic notes on Palaeoneura and Xenopolynema stat. rev. and description of a new genus (Hymenoptera: Mymaridae), Zootaxa 1455 (1), pp. 1-68 : 64-65

Xenopolynema Ogloblin 1960 , stat. rev.

( Figs 127–129 )

Xenopolynema Ogloblin 1960: 9 . Type species: Xenopolynema areolatum Ogloblin , by monotypy and original designation. Stat. rev. (resurrected from previous synonymy under Polynema ).

Polynema Haliday : Yoshimoto 1990: 82 (synonymy).

Diagnosis

Ogloblin (1960) omitted several important distinguishing features of this genus, probably because of the way the type specimens were slide-mounted, without proper clearing.

Body color brown to dark brown; face with a pit next to each torulus; female antenna with funicle segments short ( Fig. 127 ), F6 with 1 longitudinal sensillum and clava with 8 longitudinal sensilla; propleura abutting each other anteriorly along midline, the prosternum thus closed anteriorly; frenal line and foveae approximately in the middle of scutellum ( Fig. 128 ), scutellar sensilla more or less midway between anterior scutellar margin and frenal line; propodeum with semicircular carinae submedially ( Fig. 128 ); forewing ( Fig. 129 ) broad and densely setose, the blade with a conspicuous darkening below marginal vein (demarcating the archaic basal vein) and a conspicuous narrow darkening along the anterior margin distal to apex of venation; marginal vein relatively long and with 2 dorsal macrochaetae; petiole in dorsal view notably broadened (subrectangular) ( Fig. 128 ), at most 2 x as long as wide, attached to gastral sternum; male genitalia with digitus bearing 2 conspicuous and 1 inconspicuous denticles (spines).

Xenopolynema resembles Polynema s. l. only superficially. It can be distinguished from Polynema by the way its extremely wide petiole is attached to the gaster (to the gastral sternum), by the forewing blade with a conspicuous darkening below marginal vein (demarcating the archaic basal vein) ( Fig. 129 ), and by the semicircular submedial carina on the propodeum ( Fig. 128 ). As discussed under Boccacciomymar , Xenopolynema is more similar and apparently more closely related to the Australian members of that genus than to Polynema .

Biology Host associations and other biological information are unknown.

Distribution Temperate Neotropics.

Figures

FIGURES 127–129. Xenopolynema areolatum (female, Chile). 127. Antenna. 128. Mesosoma and petiole (anterior part). 129. Forewing.