Two new species of Baeus (Hymenoptera: Scelionidae) from southeastern Brazil parasitoids of Anelosimus (Araneae: Theridiidae).
Author
Margaría, C. B.
Author
Loiácono, M. S.
Author
Gonzaga, M. O.
text
Zootaxa
2006
1162
45
52
http://128.146.250.117/pdfs/21207/21207.pdf
journal article
21207
51607BDA-BC10-491E-B057-702FF339EAC4
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
,
Jundiai
,
State of
Sao
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
Sao
Paulo. This area corresponds to
Parana
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.