Anagyrus antoniae Guerrieri, 2018

Guerrieri, Emilio & Cascone, Pasquale, 2018, Anagyrus Howard (Hymenoptera: Encyrtidae) parasitoids of the invasive Delottococcus aberiae (De Lotto) (Hemiptera: Pseudococcidae) from South Africa, with description of two new species, Zootaxa 4531 (3), pp. 374-382 : 378

Anagyrus antoniae Guerrieri sp. nov.

( Fig. 8–12 )

Description. Female (Holotype). Length, 1.1 mm. Head ( Fig. 8 ) dark orange, gena with posterior margin brown, thorax dark orange, tegula whitish with brown apex; antenna ( Fig. 9 ) with radicle brown, scape largely brown except two whitish bands at base and close to apex; pedicel brown at base and whitish at apex; F1 brown, remaining parts of antenna uniformly whitish; legs yellow, dorsum of femora and tibiae bordered with brown (particularly so on middle legs), tarsi with last segment brown; forewing hyaline, venation ( Fig. 10 ) brown; gaster brown.

Head ( Fig. 8 ) on FV between anterior ocellus and top of scrobes appearing smooth with extremely weak sculpture resembling that of mesoscutum; HW about 3,2× FV; ocelli forming an angle of about 90°; lowest margin of antennal torulus below lowest eye margin; antenna ( Fig. 9 ) with scape about 2× as long as wide, F1 about 0.6× as long as pedicel, funicular segments of about the same length and increasing in width toward apex, F6 about 1.2× as long as broad. Relative measurements: HW 52, FV 16, POL 10, OOL 2, OCL 4, EL 34, EW 26, MS 12, SL 30, SW 15.

Mesoscutum 0.5× as long as wide and a little shorter than scutellum (13:12); forewing about 2.6× as long as broad, PMV ( Fig. 10 ) shorter than MV; MV shorter than SV. Relative measurements: FWL 136, FWW 52, MV 7.5, PMV 4.5, SV 10.

Metasoma about 1× as long as head and thorax together; ovipositor not exserted. Paratype: hypopygium ( Fig. 11 ) heart shaped, 1×as wide as long; ovipositor ( Fig. 12 ) about 1.3× as long as mid tibia and 4.5× as long as gonostylus. Relative measurements: OL 110, MT 85, GL 25.

Male. Unknown.

Variation. None in the two specimens at hand.

Hosts. The species was reared from Delottococcus aberiae (De Lotto) ( Hemiptera : Pseudococcidae ) on hybrid grapefruit (Citrus x paradisi) ( Rutaceae )

Distribution. South Africa.

Type material. Holotype ♀, South Africa, Limpopo province, 234518 m E 7357213 m S (= 23°52'28.5"S 30°23'34.7"E), 0 9.03.2017, ex Delottococcus aberiae (De Lotto) on Citrus x paradisi, Star Ruby (V. Martínez-Blay & J. Puig) (card-mounted) . Paratype 1 ♀, same data as holotype (slide-mounted) . Holotype deposited at NHM; paratype deposited at DEZA. Sequences deposited in GenBank: (Ang007) MH 401215 .

Comments. Females of A. antoniae are similar to those of A. aurantifrons ( Compere, 1926) and A. amoenus ( Compere, 1939) for general colour and antenna features. Apart from molecular evidence (see below and Fig. 18 for GenBank sequences examined), A. antoniae can be separated from A. aurantifrons by the proportion of ovipositor being 4.5x as long as gonostyli (3.5x in aurantifrons ) and from amoenus by fore wing venation with MV and PMV combined distinctly longer than SV (distinctly shorter in amoenus ). The species is named in honour of Dr. Antonia Soto Sanchez.

Figures

FIGURE 18. Tree based on COI sequences of closely related species of Anagyrus representing the maximum clade credibility tree with mean tree heights. Only posterior probabilities above 0.7 are displayed on the nodes.

FIGURES 8–12. Anagyrus antoniae Guerrieri sp. nov. ♀. 8. Head. 9. Antenna. 10. Fore wing venation. 11. Hypopygium. 12. Ovipositor.