Pristiphora annetna Smith, 2011

Smith, David R., 2011, Nematinae (Hymenoptera, Tenthredinidae) of Thailand, with notes on some other southeastern Asian nematines, Journal of Hymenoptera Research 22, pp. 1-27 : 14

Pristiphora annetna Smith sp. n. Figs 17, 18 23 30, 31

Description.

Female. Length, 6.0 mm. Black with anterior edge of labrum and mouthparts dull white; scape and pedicel white at apices; tegula and postspiracular sclerite white; apical third of mesoscutellum white. Legs with trochanters white; foreleg white with coxa and inner surface of femur black; midleg with coxa black, trochanter white, femur black, tibia white on basal three-fourths, brown on apical fourth, tarsus with basitarsomeres white to brown with remaining tarsomeres black; hind leg with coxa black, trochanter and base of femur white, basal two-fifths of tibia white, apical three-fifths of tibia and entire tarsus black. Abdomen black. Wings hyaline; veins and stigma black.

Head smooth, shiny, without punctures; head and body densely covered with fine white pubescence. Antennal length 3.7 × head width; 3rd antennomere equal to length of 4th antennomere. Malar space about half diameter of front ocellus. Distance between eye and hind ocellus about 0.8 × distance between hind ocelli. Postocellar area 3.0 × broader than long. Lower interocular distance slightly longer than eye height. Forewing with intercostal crossvein absent; with 3 cubital cells. Pulvilli minute, on tarsomeres 1-4. Tarsal claws with small inner tooth, about half length of outer tooth. Hind basitarsomere subequal to or very slightly shorter than length of remaining tarsomeres combined; hind tibial spur about 0.4 × length of hind basitarsomere and equal to width of inner hind tibia at apex. Sheath broadened at apex, with distinct lateral scopae (similar to Benson 1958, fig. 414). Lancet ( Fig. 23 ) with about 19 serrulae, serrulae on basal half rounded, those on apical half becoming flat, with very fine subbasal teeth; annuli straight but basal 3 or 4 slanted forward, each with very narrow band of fine hairs less than half width of segments.

Male. Length, 5.0 mm. Similar to female except malar space narrower, almost linear, about ¼ width of front ocellus and postocellar area about 2.2 × broader than long. Genitalia in Figs 30, 31 ; penis valve oval, dorsal and ventral margins rounded, with a short, small valvispina directed vertically near center of valve.

Type material.

Holotype female labeled "THAILAND Nan Doi Phu Kha NP, Office 14, 19°12.488'N, 101 °4.907'E, 1375 m, Malaise trap, 22-29.xii.2007, Charoen & Nikim leg., T3280" (QSBG). Paratype: Same data as for holotype (1 ♂, USNM).

Etymology.

The species name is an arbitrary combination of letters and is to be treated as a noun.

Discussion.

This species seems closest to Pristiphora lamdongensis from southern Vietnam, sharing the 3 cu cells and lack of the intercostal crossvein in the forewing and the small inner tooth of the tarsal claws. However, the inner tooth of the tarsal claws is minute in Pristiphora lamdongensis ( Haris 2007: fig. 10), whereas it is about half the length of the outer tooth in Pristiphora annetna . The unusually long antennae, which are 3.7 × the head width ( Fig. 17 ), are also distinctive for this species. Haris (2007) compares the length of the antenna as equal to the body length, though they are shorter than the body length in his illustration ( Haris 2007: fig. 11). The antennae are about as long as the body length in Pristiphora annetna . Pristiphora annetna might also be confused with Pristiphora sauteri , but the lancet of Pristiphora sauteri lacks annular spines or hairs ( Benson 1963: fig. 12) and the pronotum is largely white and only the apex of the hind femora and apical quarter of the hind tibiae are black to dark brown.

Figures

Figures 17 - 18. Pristiphora annetna, holotype 17 Lateral view 18 Apex of abdomen, sheath, and lancet.

Figures 21 - 25. Pristiphora lancets 21 Pristiphora ettera 22 Pristiphora inthanoni 23 Pristiphora annetna 24 Pristiphora phahompoki 25 Pristiphora borneensis.

Figures 26 - 33. Male genitalia. Genital capsule ventral view; penis valve lateral view 26 Genital capsule, Pristiphora borneensis 27 Penis valve, Pristiphora borneensis 28 Genital capsule, Pristiphora chalybeata 29 Penis valve, Pristiphora chalybeata 30 Genital capsule, Pristiphora annetna 31 Penis valve, Pristiphora annetna 32 Genital capsule, Pristiphora ettera 33 Penis valve, Pristiphora ettera.