Dinotrema subbidentatum 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 : 10-14

Dinotrema subbidentatum Peris-Felipo sp. nov.

urn:lsid:zoobank.org:act:367E3A7F-8D21-4882-9499-B42A909C84B2

Figs 5–7

Etymology

Named derived from the allusion of having only two teeth at the mandible in lateral view.

Type material

Holotype

BRAZIL: ♀, Sta. Cat., Nova Teutonia, 27 Jul. 1952 (F. Plaumann leg.) [B.M. 1957–341] ( BNHM). Paratypes

BRAZIL: 1 ♀, same locality as holotype, but 27º11’B 52º23’L, 7 Jun. 1937 (F. Plaumann leg.) [B.M. 1937–656] ( BNHM); 7 ♀♀, 5 ³³, same locality as holotype, but 29 May 1937, 19 Aug. 1937 [B.M. 1937–748], 30 Apr. 1938, 10 May 1938, 16 Jun. 1935, 25 Aug. 1935, 10 Sep. 1935, 8 Mar. 1936; 1 ³, same locality as holotype, but 27ºB 52–58ºL, 3 Jun. 1938 (F. Plaumann leg.) [B.M. 1938–458] ( BNHM, ZISP); 55 ♀♀, 1 ³, same locality, but 24 Mar. 1941 [B.M. 1957–341], 12 Aug. 1941, 9 Nov. 1941, 12 Sep. 1941, 14 Jul. 1944, 17 Jul. 1944, 23 Jul. 1945, 19 Apr. 1952, 10 May 1952, 30 May 1952, 1 Jun. 1952, 2 Jun. 1952, 3 Jun. 1952, 5 Jun. 1952, 17 Jul. 1952, 27 Jul. 1952, 2 Aug. 1952, 23 Oct. 1952, 26 Sep. 1952 ( BNHM, ZISP); 1 ♀, Paraná, Rondon, Jul. 1952 (F. Plaumann leg.) [B.M. 1957–341] ( BNHM).

Description

Female

HEAD. In dorsal view twice as wide as long, 1.5 times as wide as mesoscutum, smooth, with temple rounded behind eyes. Eye in lateral view 1.6 times higher than wide and 1.3 times as wide as temple medially. POL 1.2 times as long as OD; OOL 2.3 times OD. Face 1.8 times as wide as high, completely covered by numerous setae; inner margins of eyes subparallel. Clypeus 3.4 times as wide as high, slightly curved ventrally. Paraclypeal fovea short, reaching middle of distance between clypeus and eye. Mandible 3-dentate, but in lateral view only two teeth visible, slightly widened towards apex, 1.7 times as long as its maximum width. Upper tooth not visible in lateral view, very small, shorter than lower and middle teeth; middle tooth small, slightly longer than upper tooth, wide basally and pointed apically; lower tooth short, wide, rounded. Antennae 17-segmented, about as long as body. Scape 1.7 times as long as pedicel. First flagellar segment 2.5 times as long as its apical width, 1.3 times as long as second segment; second segment 1.1 times as long as its maximum width. Third to thirteenth flagellar segments 1.3–1.5 times, 14 th segment 1.8 times, and 15 th (apical) segment 2.0 times as long as their width.

MESOSOMA. In lateral view, 1.2 times as long as high. Mesoscutum (dorsal view) as long as its maximum width, with numerous setae located on its middle part. Notauli mainly absent on horizontal surface of mesoscutum. Mesoscutal pit distinct and elongate. Prescutellar depression smooth, with median and lateral carinae. Precoxal sulcus present, crenulate, not reaching anterior and posterior margins of mesopleuron. Posterior mesopleural furrow smooth. Propodeum mainly smooth, 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, 4.0 times as long as its maximum width. Vein cuqu1 (2-SR) sclerotized. Vein r2 (3-SR) 1.8 times as long as vein cuqu1 (2-SR); vein r3 (SR1) 2.6 times as long as vein r2 (3-SR). Nervulus (cu-a) distinctly postfurcal. Brachial (subdiscal) cell closed distally, 3.0 times as long as its maximum width. Hind wing 5.6 times as long as its maximum width.

LEGS. Hind femur 3.9 times as long as its maximum width. Hind tibia slightly widened apically, 8.3 times as long as its maximum subapical width and about as long as hind tarsus. First segment of hind tarsus 1.9 times as long as second segment.

METASOMA. First tergite slightly widened towards apex, 1.4 times as long as its apical width, entirely striate. Ovipositor 1.4 times as long as first tergite, 0.6 times as long as metasoma, 0.9 times as long as hind femur.

COLOUR. Body, flagellar segments and pterostigma from brown or dark brown. Legs yellow. Wings hyaline.

LENGTH. Body 1.6 mm; fore wing 2.2 mm; hind wing 1.6 mm.

Male

Body length 2.0 mm; fore wing 2.5 mm; hind wing 1.9 mm. Antenna 17–19-segmented. First flagellar segment 3.0 times as long as its maximum width.

VARIATION. This new species has four morphological groups based on the body colour and the size of metasoma.

Body light – metasoma short ( Fig. 5A ); this is the typical form.

Body light – metasoma elongated ( Fig. 5C, 5E ): legs yellow; ovipositor 0.4 times as long as metasoma; body length 1.7 mm; antenna 16–17-segmented.

Body dark – metasoma short ( Fig. 5B, 5F ): legs dark brown; ovipositor 0.4 times as long as metasoma; body length 1.9 mm; antenna 16–18-segmented.

Body dark – metasoma elongated ( Fig. 5D ): legs dark brown; ovipositor 0.45 times as long as metasoma; body length 1.8 mm; antenna 16–18-segmented.

Comparative diagnosis

This new species is similar to Dinotrema plaumanni sp. nov.; differences between both species are shown after the description of the last species.

According to the key by Peris-Felipo et al. (2014b), this new species is similar to Dinotrema necrophilum (Hedqvist, 1972) and D. varimembre (Fischer, 1973) . Dinotrema subbidentatum sp. nov. differs from D. necrophilum in having the mandible 1.7 times as long as its maximum width (1.5 times in D. necrophilum ), the first metasomal tergite 1.4 times as long as its apical width (1.6 times in D. necrophilum ), mesoscutal pit elongate (oval in D. necrophilum ), and prescutellar depression with lateral carinae (without lateral carinae in D. necrophilum ). Also, D. subbidentatum sp. nov. differs from D. varimembre in having the face 1.8 times as wide as high (1.4 times in D. varimembre ), the first metasomal tergite 1.4 times as long as its apical width (1.8–2.0 times in D. varimembre ), mesoscutal pit elongate (oval in D. varimembre ), and prescutellar depression with lateral carinae (without lateral carinae in D. varimembre ).

Figures

Fig. 5. Dinotrema subbidentatum Peris-Felipo sp. nov. (A–D ♀; E–F ³). A. Habitus variety body light – metasoma short, lateral view. B. Habitus variety body dark – metasoma short, lateral view. C. Habitus variety body light – metasoma long, lateral view. D. Habitus variety body dark – metasoma long, lateral view. E. Habitus variety body light, lateral view. F. Habitus variety body dark, lateral view.

Fig. 6. Dinotrema subbidentatum Peris-Felipo sp. nov. (♀). A. Head and mandible, lateral view. B. Face, frontal view. C. Antenna. D. Head and mesonotum, dorsal view. E. Head and mesosoma, lateral view. F. Propodeum, dorsal view.

Fig. 7. Dinotrema subbidentatum Peris-Felipo sp. nov. (♀). A. First metasomal tergite. B. Metasoma, hind leg and ovipositor, lateral view. C. Fore and hind wings.