Bracon (Glabrobracon) nigricollis 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: 58-60

publication ID

http://dx.doi.org/10.5852/ejt.2012.21

publication LSID

lsid:zoobank.org:pub:993FCC8B-F8B1-42DD-B776-CA8435E08112

DOI

http://doi.org/10.5281/zenodo.3858887

persistent identifier

http://treatment.plazi.org/id/F8008D0E-FFBC-FFCA-06C2-4AE3FA9CF8C9

treatment provided by

Valdenar

scientific name

Bracon (Glabrobracon) nigricollis Wesmael, 1838
status

 

Bracon (Glabrobracon) nigricollis Wesmael, 1838  

Fig. 27 View Fig A-L

Braco nigricollis Wesmael, 1838: 19   ♀ (type material: 1 ♀), type locality: “environs de Liège” ( Belgium), the single ♀ syntype (“Je ne posséde qu’une femelle de cette espèce,” Wesmael l.c.) is not present in Wesmael’s Collection (Brussels), supposedly lost.

Bracon nigricollis   – Szépligeti 1901: 263 (♀, in key, in Hungarian); 1904 (1901): 176 (♀, in key, in German).

Bracon (Lucobracon) nigricollis   – Fahringer 1927: 251 (in key) and 363 (redescription, ♀), assigned to “Section Lucobracon   ”. — Telenga 1936: 173 ♀ (in key), 285 (redescription) (in Russian) and 376 (in key, in German). — Shenefelt 1978: 1622 (literature up to 1953).

Material examined

11 ♀♀ + 4 ♁♁: BOHEMIA: 1 ♁. HUNGARY: 5 ♀♀ + 1 ♁ from two localities. ROMANIA: 3 ♀♀ + 1 ♁ from one locality. ITALY: 1 ♀ + 1 ♁ from two localities. CYPRUS: 1 ♀. GEORGIA: 1 ♀.

Redescription of Bracon nigricollis Wesmael   (3 ♀♀) ( Fig. 27 View Fig A-H)

Introductory remark to the redescription

Owing to the absence (or loss?) of the syntype ♀ three ♀♀ were selected from among the eleven ♀♀ examined (see before); their collection data are identical: 3 ♀♀ (+ 1 ♁), Romania, Iaşi, ex Rhopobota unipunctana Haworth   , 20 August 1993, leg. et educ. I. Andriescu. The three ♀ (and one ♁) specimens matching in all respects to the original description by Wesmael (l.c.). Designation of a neotype out of the three ♀♀ was disregarded bacause the present state of the ♀♀ in question are not appropriate for it. Furthermore, a few specific features of them are not manifested uniformly.

LENGTH. Body 2.2-3 mm long (2.2: 1 ♀, 2.8: 1 ♀, 3: 1 ♀).

ANTENNAE. As long as three-fourths of body and with 23 (1 ♀) and 25 (1 ♀) antennomeres. First and penultimate flagellomeres twice as long as broad, flagellum faintly attenuating.

HEAD. In dorsal view transverse ( Fig. 27A View Fig ), 1.9 times (1.87: 1 ♀, 1.9: 2 ♀♀) as broad as long, eye 1.5- 1.6 times (1.5: 2 ♀♀, 1.6: 1 ♀) longer than temple, temple rounded, occiput weakly excavated. OOL twice longer than POL. Eye in lateral view 1.5 times as high as wide and 1.5 times wider than temple, temple beyond eye evenly wide ( Fig. 27B View Fig , see arrows). Oral opening: its horizontal diameter one-sixth longer than shortest distance between opening and eye (cf. Fig. 22B View Fig ). Head polished, face above (or around antennal sockets) finely coriaceous.

MESOSOMA. In lateral view 1.6 times as long as high, polished. Notaulix weakly distinct, around its hind meeting rugulose. Propodeum polished, around lunule with short fine striae ( Fig. 27C View Fig ).

LEGS. Hind femur 3.6 times as long as broad distally ( Fig. 27D View Fig ). Claw downcurved and with a distinct basal lobe ( Fig. 27E View Fig ).

WINGS. Forewing somewhat longer than body. Pterostigma ( Fig. 27F View Fig ) 3-3.6 times as long as wide (3: 1 ♀, 3.3: 1 ♀, 3.6: 1 ♀) and issuing r proximally   from its middle, r just   shorter than (1 ♀) to as long as (2 ♀♀) width of pterostigma. Second submarginal cell long, 3-SR 1.3-1.5 times as long as 2-SR (1.3: 1 ♀, 1.4: 1 ♀, 1.5: 1 ♀); SR1 straight, 1.4-1.6 times as long as 3-SR (1.4: 1 ♀, 1.5: 1 ♀, 1.6: 1 ♀) and reaching tip of wing. First discal cell: 1-M 1.8-1.9 times longer than m-cu (1.8: 2 ♀♀, 1.9: 1 ♀), two veins not parallel, 1-SR-M 1.5 times as long as 1-M ( Fig. 27G View Fig ).

TERGITES. First tergite ( Fig. 27H View Fig ) 1.0-1.25 times as long as broad behind (1.0: 1 ♀, 1.14: 1 ♀, 1.25: 1 ♀), sides beyond pair of spiracles faintly concave and either parallel (2 ♀♀) or somewhat converging posteriorly (1 ♀); margin of scutum finley crenulated, lateral part of tergite with rugulo-striolae (2 ♀♀), otherwise tergite polished. Second tergite transverse, 2.8 times as broad behind as long laterally and somewhat longer than third tegrite; suture between tergites 2-3 weakly bisinuate, finely crenulated. Tergites polished, second tergite antero-medially finely strio-rugulose ( Fig. 27H View Fig ). Tergites 3-4 behind (i.e. before hind margin) with a transverse weak sulcus finely crenulated (1 ♀, Fig. 27K View Fig ). Hypopygium concealed, oviposior sheath two-thirds to three-fourths as long as metasoma (or clearly to somewhat shorter than hind tibia).

COLOUR. Scape and pedicel ochre, flagellum brownish black, first 3-4 flagellomeres ventrally fainlty ochre. Head and mesosoma black, face with ochre suffusion. Cheek and temple below brownish, mandible yellow, palps pale yellow. Vertex near to eyes with a pair of faint rusty maculae. Tegula yellow (2 ♀♀) or brownish yellow (1 ♀). First tergite black with faint brownish tint. Further tergites yellow, second tergite antero-medially with a blackish macula (2 ♀♀) or tergites medially with a blackish streak (1 ♀). Legs yellow, coxae brownish. Wings subhyaline, pterostigma and veins light brownish.

Variable features of the ♀ (8 ♀♀) ( Fig. 27 View Fig I-K)

Similar to the three ♀♀. Body 2.6-2.8(-3) mm long. Antenna with 23-26 antennomeres (23: 1 ♀, 24: 2 ♀♀, 25: 3 ♀♀, 26: 1 ♀). Head in dorsal view less transverse, 1.7 times as broad as long (1 ♀, Fig. 27I View Fig ). Oral opening: its horizontal diameter one-sixth to one-fifth longer than shortest distance between opening and eye. First tergite 1.25 times longer than broad behind (3 ♀♀, Fig. 27J View Fig ). Tergites 3-4 behind (i.e. close before hind margin) with a transverse, very weak sulci finely subcrenulated (2 ♀♀, Fig. 27K View Fig ). Ovipositor sheath long, as long as hind tibia. First tergite yellow, scutum blackish (1 ♀).

Description of the ³ (4 ³³) ( Figs 27L View Fig ; 29G View Fig )

Similar to the ♀. Body 2.8-3.2 mm long (2.8: 1 ♁, 3: 2 ♁♁, 3.2: 1 ♁). Antenna somewhat longer than body and with 28-33 antennomeres (28: 1 ♁, 30: 2 ♁♁, 33: 1 ♁), flagellomeres 2-2.2 times longer than broad. Head (1.7-)1.9 times as broad as long (1.7: 1 ♁, cf. Fig. 29G View Fig ; 1.9: 3 ♁♁). First tergite like in ♀ or somewhat broadening posteriorly (1 ♁, Fig. 27L View Fig ). Metasoma vivid yellow (1 ♁).

Hosts

New host: Rhopobota unipunctana Haworth   (Lep., Tortricidae   : Eucosmini), host taken in Iaşi ( Romania: Moldavia), 20 Aug. 1993, leg. et educ. 3 ♀♀ + 1 ♁ by I. Andriescu. — Three known hosts needed to be confirmed ( Shenefelt 1978: 1622): LEP. Incurvariidae   : Lampronia fuscatella Tengström   ; Momphidae   : Mompha subbistrigella Haworth   and Tortricidae   : Cydia discretana Wocke.  

Distribution

Belgium, Bohemia, Hungary, Romania, Italy, Cyprus, Georgia; after Shenefelt (1978: 1622): The Netherlands, France, Germany.

Taxonomic position

Bracon (Glabrobracon) nigricollis Wesmael   is nearest to B. (Gl.) conjugellae Bengtsson   ( Sweden, Hungary), a few features are distinctive between the two species:

1 (2) Head in dorsal view less transverse, 1.7-1.75 times as broad as long; temple moderately rounded, eye 1.4-1.5 times longer than temple ( Fig. 29G View Fig ). Firts tergite 1.4-1.5 times longer than broad behind, beyond pair of spiracles with slightly converging sides; second tergite slightly longer than third tergite ( Fig.29H View Fig ). Hind femur broadest medially( Fig.29I View Fig ).Ovipositor sheath longer than hind tibia.Metasoma vivid yellow, medially with dark brown streak. ♀ ♁: 3.2-3.4 mm .... B. (Gl.) conjugellae Bengtsson, 1924  

2 (1) Head in dorsal view more transverse, (1.7-)1.9 times as broad as long; temple rounded, eye 1.8-1.9 times longer than temple ( Figs 27A, I View Fig ). First tergite at most 1.25 times longer than broad behind, beyond pair of spiracles with parallel sides; second tergite distinctly longer than third tergite ( Figs 27 View Fig H-J). Hind femur broadest distally ( Fig. 27D View Fig ). Ovipositor sheath shorter than (or at most as long as) hind tibia. Metasoma yellow,second tergite antero-medially with a blackish macula or medially with blackish streak. ♀: 2.2-3 mm, ♁: 2.8-3.2 mm ........................................................... B. (Gl.) nigricollis Wesmael, 1838  

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Braconidae

Genus

Bracon

Loc

Bracon (Glabrobracon) nigricollis Wesmael, 1838

Papp, Jenő & Xviii, Budapest 2012
2012
Loc

Bracon nigricollis

Szepligeti Gy. 1901: 263
1901
Loc

Braco nigricollis

Wesmael C. 1838: 19
1838
Loc

Bracon (Lucobracon) nigricollis

Telenga 1936: 173
Shenefelt 1978: 1622