Dryinus multicarinatus Coelho, Aguiar et Engel, 2011

Coelho, Beatriz W., Aguiar, Alexandre P. & Engel, Michael S., 2011, A survey of Dryinidae (Hymenoptera, Chrysidoidea) from Caxiuanã, Amazon Basin, with three new taxa and keys to genera and species, Zootaxa 2907, pp. 1-21 : 11-13

Dryinus multicarinatus Coelho, Aguiar et Engel , sp. nov.

( Figs 14–17 )

Diagnosis. The new species is similar to D. gibbosus ( Olmi, 1984) and D. andinus ( Olmi, 1984) but differs principally by combination of dorsal propodeal surface sculptured by numerous strong and straight longitudinal keels; head, mesoscutum, and mesoscutellum with longitudinal keels; occipital carina incomplete.

Description. FEMALE. Fully winged; body length 6 mm; head testaceous, with clypeus and mandible whitish; antenna brown, segments 1–2 testaceous; pronotum testaceous; mesothorax, metathorax, and propodeum black; metasoma brown-black; legs testaceous, mesocoxa and mesofemur partly blackish, small areas of profemur and protibia blackish. Antennal segments in following proportions: 35:12:60:25:20:20:14:14:12:19; head almost flat, dull, hairy, with few, irregular longitudinal keels on vertex and parts of frons; frontal line complete; occipital carina incomplete, only visible behind and lateral to ocelli, laterally reaching compound eyes; OL shorter than POL (4:9), posterior ocelli nearly touching occipital carina; pronotum hairy with numerous striae around disc, crossed by an anterior and posterior weak transverse impressions; anterior and posterior collar weakly visible, disc weakly humped; pronotal tubercles not reaching tegulae; mesoscutum dull, hairy, reticulate rugose with three slightly irregular, longitudinal keels extending full length of mesoscutum; notauli not visible; mesoscutellum sculptured as on mesoscutum, with some longitudinal keels; metanotum short, reticulate rugose; propodeum with dorsal surface sculptured by numerous strong, straight longitudinal keels; posterior surface reticulate rugose with two longitudinal keels; fore wing with two brown transverse bands; distal portion of Rs approximately as long as proximal portion; tibial spur formula 1–1–2; protarsomere 1 about 2.3 × protarsomere 4; protarsomere 3 produced into hook; enlarged pretarsal claw with subapical tooth and row of five lamellae; protarsomere 5 with row of 11 lamellae, apex with group of approximately 10 lamellae.

MALE. Unknown.

Material examined. BRAZIL: Holotype Ƥ ( MPEG), PA, Melgaço, Caxiuanã, trail at igarapé Ararua, P05176, 24–27.XI.2003, YPT, A.P. Aguiar & J. Dias.

Distribution. The species is known from type locality only.

Etymology. The specific epithet originates from Latin multus (“many”) and carinatus (“keeled”) with reference to propodeal sculpture.

Comments. The female of D. multicarinatus sp. nov. shares with D. gibbosus [ TRINIDAD: Holotype Ƥ of Tridryinus gibbosus Olmi (= Dryinus gibosus (Olmi)) , St. Augustine (St. George); digital photo of holotype examined] and D. andinus black mesothorax, metathorax, and propodeum, OPL shorter than OL, OL shorter than POL, hooked protarsomere 3, elongate protarsomere 1 (more than 2 × protarsomere 4: 2.6 × in D. gibbosus and 2.3 × in D. andinus ), and enlarged pretarsal claw with five lamellae. According to Olmi’s (1993) key to females of Neotropical Dryinus , the new species belongs to the ruficauda group (formerly Tridryinus Kieffer 1913 ). The key to females of Neotropical Dryinus (sensu Olmi 1993) as published under Tridryinus by Olmi (1984) can be modified as follows:

10 Dorsal surface of propodeum with numerous strong, straight longitudinal keels ( Fig. 17 ); occipital carina incomplete.......

................................................................................ D. multicarinatus sp. nov. - Dorsal surface of propodeum reticulate rugose, without keels; occipital carina complete............................. 12 12 Head black, with front part of vertex, clypeus, mandibles, and sometimes orbits testaceous; mesoscutum with areolae small..

...................................................................................... D. andinus (Olmi) - Head fully reddish-testaceous; mesoscutum with areolae broad.................................. D. gibbosus (Olmi)

Figures

FIGURE 14. Dryinus multicarinatus sp. nov., holotype, habitus, lateral view.

FIGURES 15 – 17. Dryinus multicarinatus sp. nov., holotype. 15. Head, anterior view; 16. Habitus, dorsal view; 17. Propodeum, dorsal view.