Polynema (Polynema) rangatira Triapitsyn, 2021

Triapitsyn, Serguei V., 2021, Taxonomic review of Polynema (Hymenoptera: Mymaridae) in Australia and New Zealand, with descriptions of eight new species, Zootaxa 4915 (2), pp. 151-200 : 194-197

Polynema (Polynema) rangatira Triapitsyn , sp. n.

( Figs 130–135 )

Type material. Holotype female [ NZAC] on slide ( Fig. 130 ) labeled: 1. “KOHINUI. (H.B.) N.Z. 28. 3. 57 R. A. CUMBER PASTURE.”; 2. [yellow] “ N.Z. Arthropod Collection, NZAC, Private Bag 92170, AUCKLAND, New Zealand ”; 3. “Mounted at UCR/ERM by V. V. Berezovskiy 2006 in Canada balsam”. The type locality is on North Island.

Description. FEMALE (holotype). Body dark brown except petiole as well as basal and apical gastral terga slightly lighter brown, appendages brown. Head ( Fig. 132 ) wider than high; face with faint subtorular lines. Antenna ( Fig. 131 ) with scape (excluding radicle) 3.25× as long as wide, smooth; pedicel smooth, longer than F1 and 1.8× as long as wide; F1 the shortest and F2 the longest funiculars, F3 almost as long as F6 and longer than F4 or F5, length to width ratios of funiculars: F1—2.2, F2—5.7; F3—3.9; F4—2.2; F5—2.0; F6—2.2, F6 with 1 mps; clava 2.5× as long as wide, almost as long as combined length of 3 preceding flagellomeres, with 7 mps. Mesosoma ( Fig. 134 ) about 1.4× as long as wide, mostly smooth except mesoscutum with fine, inconspicuous mesh-like sculpture; pronotum divided mediolongitudinally; mesoscutum wider than long, with notaular grooves; scutellum shorter than mesoscutum, with campaniform sensilla very close, within a diameter of a sensillum, to anterior margin, and each closer to lateral margin of scutellum than to each other, and with frenal row of foveae; propodeum ( Fig. 133 ) with median carina extending from posterior margin for almost half length. Fore wing ( Fig. 135 ) 4.7× as long as wide; marginal vein with 1 dorsal macrochaeta; disc slightly infumate, densely setose beyond venation, the discal setae originating behind apex of submarginal vein; longest marginal seta almost 1.0× greatest width of wing. Hind wing 25× as long as wide; disc slightly infumate, with median row of setae; longest marginal seta 4.4× greatest width of wing. Metacoxa smooth, about as long as petiole. Petiole ( Fig. 134 ) 2.1× as long as wide, with anterolateral “wings”. Ovipositor occupying 0.9 length of gaster ( Fig. 134 ), exserted beyond gastral apex by 0.08× own total length, and 1.1× length of metatibia.

Measurements of the holotype (µm). Mesosoma: 351; gaster: 387; ovipositor: 381. Scape (excluding radicle): 118; pedicel: 60; F1: 33; F2: 85; F3: 55; F4: 39; F5: 42; F6: 57; clava: 152. Fore wing: 1002:215; longest marginal seta: 209. Hind wing: 830:33; longest marginal seta: 145.

MALE. Unknown.

Diagnosis. Polynema rangatira females are recognized by the following combination of features: face with faint subtorular lines ( Fig. 132 ), scape without cross-ridges ( Fig. 131 ), fore wing ( Fig. 135 ) 4.7× as long as wide, and ovipositor ( Fig. 134 ) 1.1× length of metatibia. Otherwise females are somewhat similar to those of P. grafinya which have an entire, medially undivided pronotum, and a notably longer ovipositor that is at least 1.6× length of the metatibia.

Etymology. The species name is a noun in apposition; it means chief (male or female) or wellborn/noble in Mâori (te reo).

Figures

FIGURES 130–135. Polynema (Polynema) rangatira, female (holotype): 130, slide; 131, antenna; 132, head in frontal view; 133, propodeum; 134, mesosoma and metasoma; 135, fore wing.