Baeus anelosimus Margaria and Loiacono, 2006

Margaría, C. B., Loiácono, M. S. & Gonzaga, M. O., 2006, Two new species of Baeus (Hymenoptera: Scelionidae) from southeastern Brazil parasitoids of Anelosimus (Araneae: Theridiidae)., Zootaxa 1162, pp. 45-52 : 46-49

Baeus anelosimus Margaria and Loiacono , n. sp.

(Figs. 2-6).

Diagnosis

Female body yellow ochraceous; antennal club longer than A2-A6 with visible segments. Male body color chestnut brown, metasoma lighter and appendages yellowish, wings hyaline relatively narrow; digitus with three small teeth, aedeagal lobe and aedeagal-volsellar shaft combined near twice length of basal segment. Baeus anelosimus n. sp. is related to B. platensis by antennal morphology.

Description

Holotype female (Figs. 2-3)

Color. Body and appendages yellow ochraceous.

Body. Length 0.66 mm (Fig. 2). Head in dorsal view transverse (32:29), wider than mesosoma (32:20); vertex and frons with very short pilosity, and polygonal sculpture; head in lateral view higher than long (15:12), slightly higher than mesosoma; eye height: malar space (11:10); LOL:POL:OOL (10:13:1); head in frontal view subcircular, wider than high (29:19); eye with scattered very short pilosity; eye height:interorbital space (11:15).

Antenna (Fig. 3). Antennal segments in the following relative proportions (46:11), (22:12), (8:7), (3:7), (5:7), (5:9), (13:20), (9:26), (7:25), (8:21), (9:13), antennal club longer than A2-A6 (46:43).

Mesosoma. In dorsal view with fine polygonal sculpture, wider than long (18:12); mesoescutum transverse (18:10); scutellum and metanotum stripe like; mesonotum with short semidecumbent pilosity.

Metasoma. In dorsal view with T2 (first visible tergite) wider than long (27:18); T3 - T6 wider than long (25:19); T7 triangular. S1 with short longitudinal crenulae.

Allotype male (Figs. 4-6)

Color. Body light chestnut brown, metasoma lighter than remaining parts of body, and appendages yellowish.

Body. Length 0.9 mm. Head in dorsal view transverse (24:18); eye height:malar space (8:7), LOL:POL:OOL (6:13:2); head in frontal view wider than high (25:16); eyes with very short pilosity; eye height:interorbital space (10:16); mandibles with three teeth (Fig. 4).

Antenna. (Fig. 5). Antennal segments in the following relative proportions: (36:15), (18:11), (12:12), (5:10), (5:10), (5:11), (6:11), (6:13), (7:14), (4:21), (13:16), (17:16).

Mesosoma. In lateral view higher than long (24:20).

Wings. Fore wings hyaline, relatively narrow, length:wide (70:19), apically rounded, overlapping the apex of metasoma; stigmal vein as in Fig. 6; hind wings hyaline with setae slightly longer than wing width.

Metasoma. Metasoma in dorsal view longer than high, with first tergite trapezoidal, wider than long (13:4), with longitudinal costae; T2 wider than long (21:10), with costae in the posterior portion of the segment.

Genitalia. Digitus with three small teeth, penis valves and ventral portion of aedeagalvolsellar shaft without sclerotization; volsellar laminae developed as a weakly ventral plate; aedeagal lobe and aedeago-volsellar shaft combined near to two times length of basal segment.

Type material designation

Holotype female on card, Brazil, Jundiaí, State of São Paulo, Serra do Japi , 23-I-1998, Gonzaga coll., reared from Anelosimus studiosus (Araneae: Theridiidae ) eggs. Allotype, male (on microscopic slide), same data as holotype. Paratype, female (on microscopic slide), same data as holotype.

Distribution

Baeus anelosimus sp. nov. is distributed in the Brazilian state of São Paulo. This area corresponds to Paraná subregion of the Neotropical region, according to the new biogeographical scheme of Morrone (2001).

Etymology

This species is named after the genus of the spider host Anelosimus used as noun in genitive.