Dinotrema plaumanni Peris-Felipo, 2016

Peris-Felipo, Francisco Javier & Belokobylskij, Sergey A., 2016, First record of the genus Dinotrema Foerster, 1862 (Hymenoptera, Braconidae, Alysiinae) from the Neotropical region, with description of four new species and a key to the New World taxa, European Journal of Taxonomy 179, pp. 1-23 : 7-10

Dinotrema plaumanni Peris-Felipo sp. nov.

urn:lsid:zoobank.org:act:7A99D0C5-C2F8-4401-B364-44E1DD5A0631

Figs 3–4

Etymology

Named after Fritz Plaumann who collected the type material of this species.

Type material

Holotype

BRAZIL: ♀, Nova Teutonia, 27º11’B 52º23’L, 14 Jun. 1937 (F. Plaumann leg.) [B.M. 1937–656] ( BNHM).

Paratypes

1 ♀, 1 ³, same locality as holotype, but 28 Aug. 1937 and 3 Apr. 1938 [B.M. 1938–682] ( BNHM).

Description

Female

HEAD. In dorsal view, 1.8 times as wide as long, 1.5 times as wide as mesoscutum, smooth, with temple rounded behind eyes. Eye in lateral view 1.8 times higher than wide and 1.8 times as wide as temple medially. POL as long as OD; OOL 2.5 times OD. Face 1.7 times as wide as high, completely covered by numerous setae; inner margins of eyes subparallel. Clypeus 2.2 times as wide as high, slightly curved ventrally. Paraclypeal fovea short, not reaching middle of distance between clypeus and eye. Mandible 3-dentate, slightly widened towards apex, 1.3 times as long as its maximum width. Upper tooth small, longer than lower and middle teeth; middle tooth small, slightly longer than upper tooth, wide basally and pointed apically; lower tooth short, rounded. Antennae 23-segmented, 1.2 times longer than body. Scape 1.4 times as long as pedicel. First flagellar segment 3.5 times as long as its apical width, 1.3 times as long as second segment. Second to thirteenth flagellar segments 2.1–2.4 times as long as their maximum width; 14 th to 17 th segments 1.9–2.1 times, 18 th to 20 th segment 1.6–1.8 times, and 21 st (apical) segment 2.3 times as long as wide.

MESOSOMA. In lateral view, 1.3 times as long as high. Mesoscutum (dorsal view) 0.8 times as long as its maximum width. Notauli mainly absent on smooth horizontal surface of mesoscutum. Mesoscutal pit present and elongate. Prescutellar depression smooth, with lateral carinae. Precoxal sulcus present, crenulate, not reaching anterior and/or posterior margins of mesopleuron. Posterior mesopleural furrow smooth. Propodeum entirely rugose-reticulate, with pentagonal areola. Propodeal spiracles relatively small.

WINGS. Length of fore wing 2.5 times its maximum width. Radial (marginal) cell ending at apex of wing, 3.3 times as long as its maximum width. Vein cuqu1 (2-SR) present and sclerotized. Vein r2 (3-SR) 2.2 times as long as vein cuqu1 (2-SR); vein r3 (SR1) 2.0 times as long as vein r2 (3-SR). Nervulus (cu-a)

distinctly postfurcal. Brachial (subdiscal) cell closed distally, 3.9 times as long as its maximum width. Hind wing 5.5 times as long as its maximum width.

LEGS. Hind femur 3.8 times as long as its maximum width. Hind tibia slightly widened apically, 9.1 times as long as its maximum subapical width, 1.1 times as long as hind tarsus. First segment of hind tarsus 2.2 times as long as second segment.

METASOMA. First tergite slightly widened towards apex, 3.0 times as long as its apical width, striate. Ovipositor 1.7 times as long as first tergite, 0.6 times as long as metasoma and 1.1 times as long as hind femur.

COLOUR. Body, antenna and pterostigma brown. Legs yellowish brown. Last five apical flagellar segments paler than middle segments, yellowish brown. Wings hyaline.

LENGTH. Body 2.0 mm; fore wing 2.4 mm; hind wing 1.7 mm.

VARIATION. Hind femur 3.9 times as long as its maximum width.

Male

Body 2.2 mm; fore wing 2.0 mm; hind wing 1.5 mm. Antenna more than 22-segmented (apical segments missing). Hind femur 4.2 times as long as its maximum width.

Comparative diagnosis

This new species is similar to Dinotrema subbidentatum sp. nov. but differs from it in having a rather long (visible in lateral view) upper tooth of mandible (very short and almost invisible in D. subbidentatum sp. nov.), mandible 1.3 times as long as its maximum width (1.7 times in D. subbidentatum sp. nov.), apical flagellar segments paler than middle segments (apical and middle segments similarly coloured in D. subbidentatum sp. nov.), the first flagellar segment 3.5 times as long as its maximum width (2.5–3.0 times in D. subbidentatum sp. nov.), eye in lateral view 1.8 times as wide as temple medially (1.3 times in D. subbidentatum sp. nov.), and the first metasomal tergite 3.0 times as long as its apical width (1.4 times in D. subbidentatum sp. nov.).

According to the key by Peris-Felipo et al. (2014b), this new species is similar to Dinotrema adventum (Fischer, 1973) and D. macrocera (Thomson, 1895) . Dinotrema plaumanni sp. nov. differs from these species in having the first metasomal tergite 3.0 times as long as its apical width (2.0 times in D. adventum and 2.2 times in D. macrocera ), face 1.7 times as wide as high (1.25 times in D. adventum and 1.5 times in D. macrocera ), mesoscutal pit elongate (rounded in D. adventum and oval in D. macrocera ), and prescutellar depression with lateral carinae (without lateral carinae in D. adventum and D. macrocera ).

Figures

Fig. 3. Dinotrema plaumanni Peris-Felipo sp. nov. (A, C–F ♀; B ³). A–B. Habitus, lateral view. C. Face, mandible and mesosoma in lateral view. D. Antenna. E. Head, dorsal view. F. Head, lateral view and mesonotum, dorsal view.

Fig. 4. Dinotrema plaumanni Peris-Felipo sp. nov. (♀). A. Propodeum, dorsal view. B. First metasomal tergite. C. Metasoma, hind leg and ovipositor, lateral view. D. Fore and hind wings.