Heligmothynnus neoatratus, Brown, 2005

Brown, G. R., 2005, A revision of Tachyphron Brown and description of two new genera within the Ariphron group (Hymenoptera: Tiphiidae), Journal of Natural History 39 (2), pp. 197-239 : 212

Heligmothynnus neoatratus sp. n.

( Figures 21, 22 , 28 , 59 )

Material examined. HOLOTYPE: „. Indonesia: Irian Jaya: Port Freeport Concession, Wapoga camp, 3.14 ° S, 136.57 ° E, Malaise trap, montane primary rainforest, 1158 m (3800 ft), 19–29 April 1998, R. R. Snelling, in LACM.

Distribution. Known only from montane primary rainforest, Wapoga, Irian Jaya ( Figure 59 ).

Etymology. The specific name is derived from Greek, and is a reference to the similarity of this species to H. atratus .

Diagnosis. Male: gena long. Forewings with black preapical spot. Metapleura rugosely punctate. Propodeum closely punctate. Pronotum and tegulae with yellow marks. Metanotum black. Dorsal margin of parameres strongly curved, not dentate ( Figure 21 ). Basal section of aedeagus with ventral lobes not visible dorsally ( Figure 22 ).

Description. Male: black; anterior margin of pronotum (narrowly interrupted medially) and medial spot on metanotum yellow; tegulae testaceous with yellow basal band; wings infuscate with dark preapical spot on fore wing; veins and stigma brown; setae white. Clypeus closely and finely punctate, apically truncate, sagittal carina obscure dorsally. Frons closely to rugosely punctate. Vertex closely punctate. Gena finely punctate, slightly oblique, less than half length of minimum eye diameter. Occipital carina visible dorsally. Genal cavity visible dorsally. Pronotum including anterior surface rugosely punctate. Mesoscutum rugosely punctate. Mesoscutellum closely to rugosely punctate. Metanotum finely punctate. Propodeum closely punctate. Mesopleura finely rugosely punctate. T1–6 almost impunctate except posterolaterally; T7 closely and coarsely punctate, impunctate medially; T1 with length: width 1.9:1. S1 shallowly and sparsely punctate; S2–8 almost impunctate but becoming punctate posterolaterally. Hypopygium ( Figure 28 ) subparallel, lateral spines short, acute and divergent, apical spine subtriangular and as long as lateral spines. Genitalia ( Figures 21, 22 ) with parameres long, narrow and curved over most of length, dorsal margin curved basally, apices strongly down-turned, rounded, divergent, ending beyond apex of aedeagus (when coiled); basiparameres in dorsal view subtriangular, apex emarginate and ending beyond level of apices of cuspides, broad in lateral view; aedeagus with basal and apical sections, basal section short, swollen and hood-like with a pair of ventral lobes that originate from inside (rather than the margin of) the basal section, apical section extremely long, filamentous and coiled (maceration in KOH causes the coil to intensify and tighten such that it is more coiled and the coil diameter is smaller), much longer than length of parameres. BL: 13; FW: 10; HW: 6.

Figures

Figure 59. Distribution of Deuterothynnus spp. and Heligmothynnus spp. (note the coincident collecting of D. fulvicentratus with H. microspinus, and D. fulvisetatus with D. parallelus).

Figures 17–24. Heligmothynnus spp., male genitalia, lateral and dorsal views. (17, 18) H. microspinus. (19, 20) H. atratus. (21, 22) H. neoaratus. (23, 24) H. sabronensis (note: basal ring not shown). Scale bar: 0.25 mm.

Figures 25–28. Heligmothynnus spp., male hypopygia. (25) H. sabronensis. (26) H. microspinus. (27) H. atratus. (28) H. neoaratus. Scale bar: 0.25 mm.