Eustenogaster spinicauda 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 : 27-28

publication ID

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

DOI

https://doi.org/10.5281/zenodo.3503575

persistent identifier

https://treatment.plazi.org/id/4E55E763-FFCC-FFC9-FF53-F86EFCFF0574

treatment provided by

Plazi

scientific name

Eustenogaster spinicauda Saito
status

sp. nov.

Eustenogaster spinicauda Saito , sp. nov.

This species is similar to E. calyptodoma , but can be distinguished from the latter by the following characters: larger body size (see below); female clypeus and supraclypeal area with sparse and shallow punctures, impunctate supraclypeal area larger than in E. calyptodoma , and space between antennal sockets irregularly punctate; punctures on mesoscutum sparser, some interspaces in anterior part larger than puncture; female sixth metasomal tergum with stout spine ( Fig. 50 View FIGURES 50 – 56 ); dorsal half of male clypeus more or less convex ( Fig. 51 View FIGURES 50 – 56 ), ventral half of clypeus slightly concave; digitus apically with long hairs ( Fig. 59 View FIGURE 59 Y); aedeagus more elongate than in E. calyptodoma ( Fig. 59 View FIGURE 59 M); gena and eye emargination entirely black.

Female. Body length (head + mesosoma + first two metasomal segments) 18.5–21 mm (holotype: about 21 mm); forewing length 14.5–16 mm (holotype: about 15 mm).

Head in frontal view about as wide as high ( Fig. 52 View FIGURES 50 – 56 ). Eyes in lateral view ( Fig. 53 View FIGURES 50 – 56 ) with maximum width about 4.1 times as wide as that of gena. Anterior ocellus about 1.3 times larger in width than posterior ocellus ( Fig. 54 View FIGURES 50 – 56 ); distance between anterior and posterior ocelli shorter than diameter of posterior ocellus; posterior ocelli separated from each other by distance about equal to or slightly larger than their diameter.

First metasomal tergum narrow and long (7.2–8.2 mm long), about 5.7 times longer than its maximum height, about 5.8 times longer than the maximum width.

Color: Body black; marking pattern and wing coloration similar to that of E. calyptodoma , but differing in spot in eye emargination absent ( Fig. 58 View FIGURE 58 ) and in basal part of second metasomal tergum colored pale-brown or orange instead of yellow.

Male. Body length (head + mesosoma + first two terga) 16–18.5 mm; forewing length 14–15.5 mm. Head in frontal view about as wide as high ( Fig. 55 View FIGURES 50 – 56 ); eye enlarged, in lateral view strongly swollen ( Fig. 51 View FIGURES 50 – 56 ), with maximum width slightly more than five times as wide as that of gena; clypeus entirely yellow or with only small, black spot; eye emargination sometimes with small yellow spot; mandible sometimes with yellow spot at base; propodeum with dorsolateral yellow marking, sometimes split into two spots.

Type material: Holotype female (deposited in RMNH) labeled “Catbalogan, Samar, Eustenogaster spinicauda , Ψ, m. det. J.v.d.Vecht, 1960” and “ Paratype ”.

Paratypes: Philippines: 1ɗ ( RMNH), Catbalogan, Samar; 1Ψ ( RMNH), Surigao, Mindanao, JvdV; 4ɗ ( GMNH), Borongan, E. Samar, 7–18.v.1984, CKS; 2Ψ42ɗ ( GMNH), Leyte, Baybay, CKS [2Ψ30ɗ, 28.viii.1980; 3ɗ, 27–29.viii.1980; 2ɗ, 5.ix.1984; 4ɗ, 29.iv.1987; 3ɗ, 6.v.1987]; 2Ψ ( GMNH), Mindanao, Bukidonon, Musuan, Maramag, 3.i.1985, CKS & L. Pinto.

Distribution: Philippines: Mindanao, Leyte, Samar.

Etymology: The specific name spinicauda is based on van der Vecht’s manuscript name. This is a compound of a feminine Latin noun, spini (= thorn-bush), and a feminine Latin noun, cauda (= tail), referring to the stout spine of the female sixth metasomal tergum.

RMNH

National Museum of Natural History, Naturalis

GMNH

Georgia Museum of Natural History

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Vespidae

Genus

Eustenogaster

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