Bracon (Glabrobracon) terebella Wesmael, 1838

Papp, Jenő & Xviii, Budapest, 2012, A revision of the Bracon Fabricius species in Wesmael’s collection deposited in Brussels (Hymenoptera: Braconidae: Braconinae), European Journal of Taxonomy 21, pp. 1-154 : 100-104

publication ID	https://doi.org/ 10.5852/ejt.2012.21
DOI	https://doi.org/10.5281/zenodo.3858914
persistent identifier	https://treatment.plazi.org/id/F8008D0E-FFE6-FF96-06DB-4B29FA9CFDA5
treatment provided by	Valdenar
scientific name	Bracon (Glabrobracon) terebella Wesmael, 1838
status

Treatment

Bracon (Glabrobracon) terebella Wesmael, 1838 View in CoL

Figs 48 View Fig A-K, 49A-G, 50A-B

Braco terebella Wesmael, 1838: 57 ♀ (type material: 4 ♀♀), type locality: “environs de Bruxelles ” ( Belgium), ♀ lectotype (and three ♀ paralectotypes, present designations) in the Royal Belgian Institute of Natural Sciences, Brussels; examined.

Bracon terebella View in CoL – Szépligeti 1901: 269 (in key, in Hungarian); 1904 (1901): 189, 190 (in key, in German).

Bracon (Glabrobracon) terebella View in CoL – Fahringer 1927: 294 (♀), 307 (♁) (in key), 1928: 490 (redescription) ♀ ♁, assigned to “Section Glabrobracon ”. — Telenga 1936: 146 (♀), 155 (♁) (in key), 195 (redescription) (in Russian) and 348 (♀), 358 (♁) (in key, in German). — Papp 1966: 377 (in key), 391 (redescription) ♀ ♁. — Shenefelt 1978: 1582 (literature up to 1971). — Tobias 1986: 128 (in key, in Russian). — Tobias & Belokobylskij 2000: 135 (in key, in Russian).

Designation of the ♀ lectotype of Bracon terebella View in CoL

(First label, printed) “ Coll. Wesmael ”; (second label, printed) “2081”; (third label) “ Braco terebella / var. 1. ♀ ” (handwritten) / “dét. C. Wesmael ” (printed); (fourth label, printed red) “Type”; fifth label is with the (?)inventory number “3.317”; sixth label is with the locality after Wesmael (l.c.) “ Belgium / Bruxelles ” (printed); seventh label is the lectotype card (sixth and seventh labels attached by me). Lectotype is in good condition: (1) micropinned, pin fairly thick; (2) left flagellum deficient, i.e. with 11 flagellomeres; (3) left hind wing missing. - Remark: The lectotype was originally assigned as a variety of the nominate form, this is indiacted on the third (name) label as “var. 1.” This specimen is in the best condition (from among the four syntypes), consequently this was selected for the lectotype status.

Designation of the three ♀ paralectotypes of Bracon terebella

Labels are identical to those of the lectotype except two labels; the second of the two nominate forms with the number “2082”, the third label without “var. 1.” (except one ♀); the paralectotype cards are printed yellow. -- Paralectotypes are in good condition: Legs and wings partly missing or damaged.

Material examined

43 ♀♀ + 18 ♁♁ from nine countries: ENGLAND: 3 ♀♀ + 3 ♁♁ from two localities. GERMANY: 4 ♀♀ + 1 ♁ from five localities. FRANCE: 2 ♀♀ from two localities. DENMARK: 1 ♀. SWEDEN: 3

♀♀ from three localities. BOHEMIA: 1 ♀. SLOVAKIA: 1 ♀. HUNGARY: 24 ♀♀ + 14 ♁♁ from 23 localities. KOREA: 4 ♀♀ from three localities.

Redescription of the ♀ lectotype of Bracon terebella ( Figs 48 View Fig A-I; 50A)

LENGTH. Body 3.8 mm long.

ANTENNAE. About one-fourth shorter than body and with 28 antennomeres. First flagellomere 1.8 times, further flagellomeres attenuating so that penultimate flagellomere 1.7 times as long as broad ( Fig. 48A View Fig ).

HEAD. In dorsal view transverse ( Fig. 48B View Fig ), 1.8 times as broad as long, eye 1.5 times longer than temple, temple rounded, occiput weakly excavated. Eye in lateral view almost 1.6 times as high as wide, just onefourth wider than temple, temple evenly wide behind eye ( Fig. 48C View Fig , see arrows). Horizontal diameter of oral opening one-third longer than shortest distance between opening and compound eye ( Fig. 48D View Fig ). Head polished.

MESOSOMA. In lateral view 1.4 times as long as high, polished. Propodeum close around lunule with short rugulae ( Fig. 48E View Fig ).

LEGS. Hind femur 3.1 times as long as broad distally ( Fig. 48F View Fig ). Claw curved, fairly short, its basal lobe large ( Fig. 50A View Fig ).

WINGS. Forewing as long as body. Pterostigma ( Fig. 48G View Fig ) 2.7 times as long as wide and issuing r just proximally from its middle, r almost 0.8 times as long as width of pterostigma. Second submarginal cell of usual size, 3-SR a bit longer than 2-SR, SR1 straight, nearly 1.9 times longer than 3-SR and reaching

tip of wing. First discal cell usual in form, 1-M twice as long as m-cu and not parallel, 1-SR-M almost straight and 1.3 times as long as 1-M ( Fig. 48H View Fig ).

TERGITES. First tergite ( Fig. 48I View Fig ) somewhat longer than broad behind, beyond pair of spiracles parallelsided, together with further tergites polished. Second tergite 2.8 times as broad as long laterally, third tergite one-fifth longer than second tergite laterally, suture between them bisinuate, smooth. Ovipositor sheath short, as long as hind tarsomeres 1-2 combined.

COLOUR. Ground colour of body dark brown to black(ish). Oral part brownish yellow, palpi light brown. Orbit faintly reddish. Tegula black. Tergites dark brown to black, tergites 2-5 laterally yellow. Legs blackish to black, fore femur + tibia, hind femur apically and hind tibia proximally yellow. Wings faintly brownish fumous, pterostigma and veins brown to light btrown.

One ♀ paralectotype “var. 1.” (by Wesmael) is identical with the ♀ lectotype (also assigned as “var. 1.” by Wesmael).

Deviating features of the two ♀ paralectotypes of Bracon terebella ( Fig. 48J View Fig )

Similar to the ♀ lectotype + one ♀ paralectotype. Body 2.9-3 mm long. Antenna with 26 and 28 antennomeres. Pterostigma 3.3 times as long as wide and issuing r somewhat more proximally from its middle ( Fig. 48J View Fig ). Dark colour of body brown to light brown, legs with more yellow pattern.

Variable features of the ♀ (43 ♀♀) ( Figs 48K View Fig ; 49 View Fig A-E; 50B)

Body 2.7-3.5 mm long. Antenna 26-32 antennomeres. Temple rather receded ( Fig. 49A View Fig ) or head rarely 1.7 times as broad as long and temple less rounded ( Fig. 48K View Fig ). Pterostigma wide, 2.5 times as long as wide ( Fig. 50B View Fig ), second submarginal cell long, 3-SR 1.3 times as long as 2-SR ( Fig. 49B View Fig ). Hind femur 2.9 times as long as broad medially ( Fig. 49C View Fig ). First tergite broadening posteriorly, laterally unevenrugulose ( Fig. 49D View Fig ) or scutum apically uneven-rugulose, laterally at most uneven ( Fig. 49E View Fig ). Tergites, beyond first one, with a median dark (dark brown to black) streak, laterally rusty to reddish yellow.

Variable features of the ³ (18 ³³) ( Figs 49 View Fig F-G; 50B)

Similar to the ♀. Body 2.5-3.5 mm long. Flagellomeres 1.7-2 times longer than broad. Second submarginal cell either long: 3-SR 1.4 times as long as 2-SR ( Fig. 49F View Fig ) or short and fairly broad: 3-SR

about 1.2 times as long as 2-SR ( Fig. 50B View Fig ). First tergite clearly longer than broad behind, tergites 2-3 equal in length ( Fig. 49G View Fig ).

Hosts

COL. Curculionidae : Miarus campanulae Linnaeus , Sibinia femoralis Germar. — HYM. Cephidae : Cephus cinctus Norton , C. pygmaeus Linnaeus , Trachelus tabidus Fabricius.

Distribution

Palaearctic Region, in Europe fairly frequent.

Taxonomic position

Within the subgenus Glabrobracon the species B. terebella is nearest to B. minutator (Fabricius) (Europe) and B. curticaudis Szépligeti (sporadic in Europe and Turkey) viewing their short ovipositor sheath, (almost) polished tergites and dark corporal colour; they are separated by the features keyed:

1 (2) First tergite as long as broad behind, second tergite polished ( Fig. 50C View Fig ) or at least (and exceptionally) antero-medially uneven-subrugulose ( Fig. 50D View Fig ). Claw slightly less downcurved ( Fig. 50E View Fig ). Tergites reddish yellow to rusty, medially with a dak brown to black(ish) maculae or with a median streak. ♀: 4-5 mm, ♁: (3.2-) 3.5-4 mm ............... B. (Gl.) minutator (Fabricius, 1798)

2 (1) First tergite not as long as broad behind, second tergite either rugulose or polished ( Figs 48I View Fig ; 49 View Fig D-E, G). Claw slightly more downcurved ( Fig. 50A, G View Fig ). Colour of tergites other.

3 (4) First tergite somewhat broader behind than long, beyond pair of spiracles with slightly broadening sides; suture between tergites 2-3 distinct, bisinuate, deep, second tergite antero- medially rugulose ( Fig. 50F View Fig ). Basal lobe of claw more distinct ( Fig. 50G View Fig ). Metasoma reddish yellow, first tergite entirely and tergites 5-6 almost entirely black. ♀: 3-4.5 mm, ♁: 3.4 mm ........................................................................................................ B. (Gl.) curticaudis Szépligeti, 1901

4 (3) First tergite longer than broad behind, beyond pair of spiracles parallel-sided, or rarely with broadening sides, suture between tergites 2-3 less distinct, weakly bisinuate to almost straight, less deep; second tergite polished ( Figs 48I View Fig ; 49 View Fig D-E, G). Basal lobe of claw less distinct ( Fig. 50A View Fig ). Tergites widely dark brown to black. ♀ ♁: (2-) 3-3.5 mm ..................................................... ............................................................................................................ B. (Gl.) terebella Wesmael, 1838

Kingdom	Animalia
Phylum	Arthropoda
Class	Insecta
Order	Hymenoptera
Family	Braconidae
Genus	Bracon