Eustenogaster latebricola Saito

Saito, Fuki & Kojima, Jun-Ichi, 2007, A taxonomic revision of the hover wasp genus Eustenogaster van der Vecht (Insecta: Hymenoptera; Vespidae, Stenogastrinae), Zootaxa 1556, pp. 1-30 : 25-26

publication ID

https://doi.org/ 10.5281/zenodo.178242

DOI

https://doi.org/10.5281/zenodo.6251968

persistent identifier

https://treatment.plazi.org/id/4E55E763-FFCE-FFCB-FF53-FB34FAD10504

treatment provided by

Plazi

scientific name

Eustenogaster latebricola Saito
status

sp. nov.

Eustenogaster latebricola Saito , sp. nov.

This species is most closely similar to E. micans , but can be distinguished from the latter by the combination of the following characters: in both sexes, body larger (see below), second metasomal tergum more strongly convex dorsally ( Figs. 39, 40 View FIGURES 39 – 45 ), spots in eye emargination and beside top of eye absent; in female, clypeus convex, median impunctate apical ridge ( Fig. 41 View FIGURES 39 – 45 ) more prominent than in E. micans , frons clearly demarcated from clypeus by suture, clypeus and supraclypeal area yellow, only with narrow median dark line ( Fig. 58 View FIGURE 58 ); in male, clypeus less hairy, supraclypeal area less concave, volsella medially with stout spine ( Fig. 59 View FIGURE 59 V), and penis valves prominently serrated ventroapically ( Fig. 48 View FIGURES 46 – 49. 46 – 48 ).

Female. Body length (head + mesosoma + first two metasomal segments) 18–21 mm (holotype: 18.5 mm); forewing length 15–16 mm (holotype: 15.5 mm).

Head in frontal view ( Fig. 41 View FIGURES 39 – 45 ) about as wide as high. Eye in lateral view ( Fig. 42 View FIGURES 39 – 45 ) with maximum width about 3.5 times as wide as that of gena. Anterior ocellus about 1.5 times larger in width than posterior ocellus ( Fig. 43 View FIGURES 39 – 45 ); distance between anterior and posterior ocelli shorter than diameter of posterior ocellus; posterior ocelli separated from each other by distance about equal to their diameter.

Pronotum posterolaterally with fine punctures, dorsolaterally with deep furrows behind pronotal collar ( Fig. 44 View FIGURES 39 – 45 ); lateral furrow present, ending posteriorly before humeral tubercle. Scutum densely punctate. Scutellum densely punctate, covered with dense hairs. Metanotum convex, hairy, with shallow punctures. Mesepisternum hairy, with fine, shallow punctures. Propodeum without punctures, posterodorsally covered with long hairs.

First metasomal tergum narrow and long (7.9–8.8 mm long, Fig. 45 View FIGURES 39 – 45 ), about 6.5 times as long as its maximum height, about 6.8 times longer than the maximum width. Sixth metasomal tergum posteriorly with prominent spine.

Male. Body length (head + mesosoma + first two metasomal segments) 17.5–19.5 mm; forewing length 14–15 mm. Similar to female, but head in frontal view ( Fig. 46 View FIGURES 46 – 49. 46 – 48 ) broader, about 1.1 times as wide as high; eye enlarged, in lateral view strongly swollen in ventral half ( Fig. 47 View FIGURES 46 – 49. 46 – 48 ), with maximum width about 6.0 times as wide as that of gena.

Type material: Holotype female (deposited in the RMNH) labeled “S. Sumatra, 250 m., Res. Benkoelen, Mocara Tenam, 4–14.vii., ME Walsh leg. 1935”, “Museum Leiden, excoll. J.v.d.Vecht” and “ Holotype ”.

Paratypes: Thailand: 1Ψ ( GMNH), 6°41’N, 100°11’E, 200m, 30km NE Satun, Thaleban N.P., 26.vii.1986, R. Hensen. Malaysia: Peninsular Malaysia: 1Ψ ( RMNH), Malaya, Kuala Sleh., 23.i.1947, HTP; 1ɗ ( RMNH), Mt. Kluang, 500m, Johore, 5km east of Lembak, 29.vii.1972, JvdV; Borneo: Sabah: 1Ψ ( RMNH), SE Sabah near Danum Valley Field C, 200m, 14–19.iii.1987, CvA; 1ɗ ( SKYC), Danum Valley, 9.xi.1996, K. Eguchi; Sarawak: 1Ψ ( SKYC), Mulu, 30.viii.1983, fl:Leea; 1ɗ ( SKYC), Kubah NP, 5.xii.1993, SkY. Indonesia: Sumatra: Ache: 1ɗ ( RMNH), Babahrot, 15.ii.1983, Klapperich; Lampungs: 1Ψ ( MZB), Wai Lima Z Sum., xi–xii.1921, Karny & Siebers; 5ɗ ( MZB), Way Kambas, [3ɗ, 7.ii.1972, Duelaer; 1ɗ, 7.ii.1972, S. Adisoemarto; 1ɗ, 10.ii.1972, Dulbear]; 1ɗ ( MZB), 1000m, Mt. Tanggamoes, Giesing, xii.1934, MAL & Toxopeus; South Sumatra: 1Ψ ( RMNH), 250m, Res. Benkoelen, Mocera Tenam, 4–14.vii.1935, MEW; 1ɗ ( RMNH), Bergen Est., 150m, 28.iii.1937, JvdV; West Sumatra: 1ɗ ( RMNH), Anei Kloof, 500m, 1926, EJ; 2ɗ ( SKYC), Sako, near Tapan, 4–5.ix.1985, SkY; Bangka Is.: 2ɗ ( RMNH), Bangka Troe, i. xii.1935, JvdV; Rakata Is.: 2Ψ ( MZB), 15.vii.1982, SkY; Kalimantan: East Kalimantan: 1Ψ ( MZB), Midden, 11.xi.1925, H.C. Siebers; 1Ψ ( GMNH), Buttun Point, 300ft., vi.1937, K.M. Walsh; 1Ψ ( MZB), 50m, Wain River, Balikpapan, xi.1950, AMRW; 2ɗ (1ɗ, RMNH; 1ɗ, MZB), 50m, Mentawir River, Balikpapan, x.1950, AMRW; 6Ψ5ɗ, 125m, Bengen River, Tabang, AMRW [1Ψ ( RMNH), 3.ix.1956; 2ɗ ( RMNH), 4.ix.1956; 1ɗ ( RMNH), 5.ix.1956; 1ɗ ( RMNH), 11.ix.1956; 1Ψ ( RMNH), 28.ix.1956; 2Ψ (1Ψ, MZB; 1Ψ, RMNH), 21.x.1956; 1Ψ1ɗ (1Ψ, RMNH; 1ɗ, MZB), 22.x.1956; 1Ψ ( RMNH), 28.x.1956]; 2Ψ1ɗ ( MZB), 00°42’S, 117°00’E, 60m, 60km, Bukit Soehart, S. Samarinda, Malayse trap, riparian, DCD & RU [1Ψ1ɗ, xi. 1993; 1ɗ, xii. 1993].

Distribution: Thailand; Indonesia: Sumatra, Bangka Is., Kurakatau Is., Java, Kalimantan. Malaysia: Peninsular Malaysia, Sabah.

Etymology. The specific name, latebricola , is a complex name formed with a Latin adjective, latus (= broad), and a feminine Latin noun, bricola (= wine-vessel). The name is a manuscript name by van der Vecht, who may have given this name to the wasp to refer to the shape of its nest. We, however, tried in vain to locate the nest(s) with their owner wasps that van der Vecht mentioned in his personal, unpublished notes.

RMNH

National Museum of Natural History, Naturalis

GMNH

Georgia Museum of Natural History

MZB

Museum Zoologicum Bogoriense

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Vespidae

Genus

Eustenogaster

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