Centistidea radialis, Liu & Polaszek, 2025

Liu, Zhen & Polaszek, Andrew, 2025, The species of Centistidea Rohwer, 1914 (Hymenoptera: Braconidae: Miracinae) from Brazil, European Journal of Taxonomy 1004, pp. 190-210 : 203-206

Centistidea radialis sp. nov.

urn:lsid:zoobank.org:act:C390F090-392A-454F-812F-5EF447941CC8

Fig. 5

Diagnosis

Body length 1.5 mm, dark brown, except T1 yellow-brown, T1–T2 white laterally and tergites posterior to T2 pale brown ( Fig. 5a, l ); head 1.8 × as wide as long dorsally; eyes 1.5× as long as temple dorsally; POL:OD:OOL = 1.2:1.0:2.7 ( Fig. 5b ); face ( Fig. 5c ) strongly convergent ventrally; antenna ( Fig. 5d ) with penultimate flagellomere 2.2 × as long as wide; mesoscutum ( Fig. 5e ) minutely finely wrinkled between punctures, notauli more strongly depressed reaching to anterior ⅓; scutellar sulcus smooth; hind depressions medium-sized and oblong, interspace at least half length of minor axis of a depression ( Fig. 5h ); propodeum ( Fig. 5k ) with median longitudinal carina split to transverse carinae near apical extremity; fore wing with vein 1-R1 0.3 of pterostigma length; T1 ( Fig. 5l ) 2.7× as long as its subapical maximum width; T2 inverted ‘T’ shape, 3.0× as wide as median length; T3 1.1 × as long as T2, weakly longitudinally striate; ovipositor sheath ( Fig. 5j ) 0.8× as long as hind basitarsus.

Etymology

The specific name ‘ radialis ’ derives from the Latin, referring to the radial microsculpture between punctures on the dorsal mesosoma.

Type material

Holotype

BELIZE • ♀; Toledo, Punta Gorda ; 12–26 May 1982; Kelly and George leg.; NHMUK010639540 ; NHMUK.

Paratypes

BELIZE • 1 ♀; Toledo, Punta Gorda, foot of Saddleback Hill ; 17–21 Aug. 1978; NHMUK010639576 ; NHMUK .

BRAZIL • 1 ♀; Nova Teutonia ; 27.1833° S, 52.3833° W; 12 Apr. 1938; F. Plaumann leg.; B.M. 1938-682; NHMUK010639603 ; NHMUK .

Description

Female

MEASUREMENTS. Body length 1.5 mm, fore wing length 1.7 mm ( Fig. 5a ).

HEAD. 1.8 × as wide as long dorsally, 1.4 × as wide as mesoscutum. Eyes 1.5 × as long as temple in dorsal view. Temple less shiny with dense setae, slightly and roundly constricted behind eyes in dorsal view ( Fig. 5b ). Ocelli small, distance between fore and hind ocellus 1.1× as long as minor axis of a hind ocellus, POL:OD:OOL = 1.2:1.0:2.7. Frons flat and polished. Vertex between eye and hind ocellus a little shiny and smooth with small, sparse setose punctures. Face ( Fig. 5c ) nearly smooth, less pubescent, strongly converged towards apex, 1.3× as wide as high. Clypeus 2.7 × as wide as median length, nearly polished except few setae. Length of malar space 1.9 × as long as basal width of mandible. Antenna ( Fig. 5d ) slightly longer than body length, with scape, pedicel and 1 st, 2 nd, penultimate and ultimate flagellomeres 1.6, 1.3, 5.0, 4.2, 2.2 and 2.1 × as long as wide, 1 st 1.2 × as long as 2 nd, flagellomeres gradually shortened to penultimate one.

MESOSOMA. Length:width:height = 2.0:1.0:1.3. Mesoscutum ( Fig. 5e ) a little shiny with evenly distributed small punctures, minutely finely wrinkled between punctures, notauli more strongly depressed reaching to anterior ⅓. Scutellar sulcus straight, narrow and shallowly concave, not crenulate. Scutellum a little shiny, nearly polished except several sparse setal punctures, minutely finely wrinkled at intervals, hind depressions medium-sized and oblong, interspace at least half length of minor axis of a depression. Propodeum less shiny, shorter, 1.8× as long as metanotum in median length, median longitudinal carina split to transverse carinae near apical extremity, weakly rugulose anteriorly, elsewhere polished. Mesopleuron ( Fig. 5f ) highly polished, smooth.

LEGS. Hind femur 3.5 × as long as its widest part. Length of hind femur:tibia:basitarsus = 1.6:2.3:1.0. Hind basitarsus 0.6 as long as tarsomeres 2–5 combined ( Fig. 5j ).

WINGS. Fore wing ( Fig. 5g ): pterostigma 2.5 × as long as its widest part, vein 1-R1 triangular, 0.3 of pterostigma length; vein r distinct, r:2-SR:2-M = 1.0:6.7:2.0, 1-SR:1-M = 1.0:2.2, 2-CU1 1.5× as long as 1-CU1; first discal cell of fore wing nearly 1.5× as wide as high. Hind wing: vein M+CU:1-M:r-m = 1.6:1.9:1.0.

METASOMA. 0.8× as long as mesosoma. T1 ( Fig. 5l ) smooth and polished, distinctly narrowed antero-medially, spatula-shaped 2.7 × as long as its subapical maximum width. T2 inverted ‘T’ shape, 3.0 × as wide as median length, not longitudinally striate laterally. T3 1.1× as long as T2, weakly longitudinally striate. Hypopygium outreaching apex of metasoma. Ovipositor sheath ( Fig. 5j ) short, 0.8 × as long as hind basitarsus, with setae dense apically.

COLOR. Dark brown, except T1 yellow-brown, T1–T2 white laterally and tergites posterior to T2 pale brown ( Fig. 5a, l ). Palpi and spurs pale yellow. Antenna dark brown. Legs all yellow except apical tarsomeres somewhat yellow-brown. Wing membrane hyaline, pterostigma brown, veins C+SC+R, r, 2-SR, 1-SR, 1-M, M+CU, 1-CU1 and 2-CU2 brown, other veins pale brown.

VARIATION. Scutellar sulcus slightly curved and T2 slightly triangular posteriorly on specimen from Saddleback Hill.

Male

Unknown.

Host

Unknown.

Distribution

Belize, Brazil.

Remarks

This species is similar to C. ubangus ( Papp, 2013) but differs in the following characters: T1 spatula-shaped (indistinctly constricted towards apex) (spoon-shaped in C. ubangus ); median longitudinal carina bifurcated before apex of propodeum (median longitudinal carina reaches apical margin in C. ubangus ); and first discal cell of fore wing nearly 1.5× as wide as high (1.1 × as wide as high in C. ubangus ).

Figures

Fig. 5. Centistidea radialis sp. nov., ♀, holotype (NHMUK010639540). a. Habitus, lateral view. b. Head, dorsal view. c. Head, frontal view. d. Antenna. e. Mesoscutum. f. Mesopleuron. g. Wings. h. Scutellum. i. Ovipositor sheath. j. Hind leg. k. Propodeum and T1, dorsal view. l. Metasoma, dorsal view.