Granulolabus, Riedel, 2017

Riedel, Matthias, 2017, Contribution to the Ichneumoninae (Hymenoptera, Ichneumonidae) of Southeastern Asia: 4. Platylabini, Eurylabini, and Oedicephalini, Linzer biologische Beiträge 49 (2), pp. 1275-1307 : 1278-1279

Granulolabus nov.gen.

Type species: Granulolabus maculatus nov.sp.

The new taxon described below shows several unusual morphological features that are completely different to all known genera of Platylabini and convinced me to create a new genus. The following features are charcteristical for this new genus:

 All tergites from the 3rd one on with fine punctulo-granulation and matte,

 horizontal part of propodeum very short, area superomedia sickle-shaped and much wider than long,

 costulae and coxal carinae present, spiracles of propodeum long-oval (3x longer than wide),

 gastrocoeli distinctly impressed; thyridiae of moderate width, c.0.8x of their interval,

 hind metatarsi long and slender, following hind tarsomeres stout,

 clypeus slightly convex, apical margin straight,

 ovipositor sheaths distinctly surpassing the metasomal apex.

In the key of World Platylabini published by TERESHKIN (2009), this genus runs to couplet 27, but differs from the genera Rhyssolabus and Hirtolabus by the structural features mentioned above.

Granulolabus maculatus nov.sp. ( fig. 27 , 32 ) H o l o t y p u s: (♀) Laos, Hua Phan Prov., Phon-Pan, Umg. Ort Ban Saleui, 2013´30´´N

10359´26´´E, 1350-1900 m, 03.- 05.04.2014 KJa, leg. C. Holzschuh & natives (Linz).

Descr ipt ion:

Body length 6 mm. Flagella with 30 segments, slightly lanceolate; 1 st flagellomeres length 4.8x width; widest segments 1.2x wider than long. Temples shortly parallel behind eyes, apically roundly and distinctly narrowed, length 0.65x eye width. Distances of lateral ocelli from eyes 1.2x their diameter. Head punctate; epistoma and frons centrally with some transverse striation. Clypeus punctate, slightly convex, with straight apical margin. Malar spaces length 0.7x width of mandibular bases. Mandibles with two teeth, lower one much shorter and moderately bent inwards. Palps not swollen. Genal carinae joining hypostomal ones close to mandibular bases; hypostomal carinae not elevated.

Mesosoma with short grey hairs. Notauli shortly impressed on frontal margin of mesoscutum; mesoscutum with dense and coarse punctures, shining. Mesopleura densely punctate, partly with some longitudinal punctulo-striation, specula smooth and shining. Metapleura punctate, partly rugose; coxal carinae present. Scutellum wider than long, moderately elevated, punctate, with strong complete lateral carinae. Propodeum with short horizontal part (area petiolaris 3x longer than areae basalis and superomedia combined); spiracles long-oval (3x longer than wide). Area superomedia strongly transverse, sickle-shaped, width 2.5x length; costulae distinct, reaching area superomedia in the middle. Area petiolaris widest in frontal third and continuously narrowed to apex, with transversal rugae. Outer edges of areae dentiparae bluntly tooth-shaped, but without distinct apophyses. Hind coxae with dense fine punctures, without scopa; hind femora densely punctate, length 4.5x height; hind metetarsi long and slender, length 0.55x length of hind tibiae and 1.25x length of 2 nd to 5 th hind tarsomeres combined; claws not pectinate. Fore wings with quadrangular areolets, short ramelli, and interstitial nervuli.

Metasoma completely amblypygous, hypopygium shortly surpassing tergal apex, short. Petiolus wider than high; postpetiolus moderately widened, width 0.7x distance of outer edges of dentiparal areae; median field somewhat elevated, smooth, with some scattered punctures; dorsal carinae absent. 2 nd tergite length 0.7x width, 3 rd tergite length 0.43x width. Gastrocoeli distinctly impressed and with some fine longitudinal rugae; thyridiae slightly oblique, width 0.8x width of their interval. 2 nd tergite with coarse and very dense confluent punctures; all following tergites very finely granulate-punctulate, matte. Ovipositor sheaths distinctly surpassing metasomal apex, seen from dorsal as long as 3 rd and 4 th hind tarsomeres combined.

Colour: Black. Ivory are stripes on flagellomeres 8-13. Cream-yellow are palps, mandibles except teeth, clypeus, face except narrow black central stripe, frontal orbits up to vertices, wide genae and outer orbits, scapes ventrally, frontal and upper margins of pronotum, two short paramedian longitudinal stripes on mesoscutum, subtegular ridges, frontal and caudal spots and upper hind edges of mesopleura, apical half of metapleura and of propodeum (except black area petiolaris), wide apical bands on 1 st to 3 rd tergites, 4 th to 7 th tergites completely, fore and middle coxae and trochanters, apical and dorsal spots on hind coxae. Hind coxae and hind trochanters black; legs otherwise reddish; hind femora black in apical 0.2; hind tibiae black in basal 0.1 and apical 0.15; all tarsi blaclish, metatarsi only at apices. Wings hyaline, pterostigmas blackish.

3 and hosts unknown.

D i s t r i b u t i o n: Laos.

Figures

Fig. 26-31: Metasoma of (26) Apaeleticus rufopetiolaris nov.sp. HT; (27) Granulolabus maculatus nov.sp. HT; (28) Pagarenes rufocoxalis nov.sp. HT; (29) Platylabus flavomaculatus nov.sp. HT; (30) Platylabus laoticus nov.sp. HT; (31) Poecilostictus decoratus ssp. laoticus nov.ssp. HT.

Fig. 32-35: Propodeum of (32) Granulolabus maculatus nov.sp. HT; (33) Platylabus flavomaculatus nov.sp. HT; (34) Platylabus laoticus nov.sp. HT; (35) Pristicerops magnus nov.sp. HT.