Mononeuron Fischer, 1981

Nunes, Juliano F., Penteado-Dias, Angelica M., Ceccarelli, Fadia S. & Zaldivar-Riveron, Alejandro, 2012, Redescription of Mononeuron duguetiae Fischer (Braconidae, Doryctinae), a gall associated species on Duguetia furfuracea (St. Hil.) (Annonaceae), Journal of Hymenoptera Research 24, pp. 75-84 : 78

Mononeuron Fischer

Mononeuron Fischer, 1981: 47-51 (original description); Marsh 1997: 214 (Key); Yu et al. 2005 (catalogue).

Type species.

Mononeuron duguetiae Fischer

Diagnosis.

Mononeuron may be distinguished from the remaining doryctine genera by having the following combination of features: frons excavated; occipital carina meeting hypostomal carina; propodeum with semicircular or subtriangular shaped basal median areas ( Fig. 2C ); fore wing vein r-m present ( Fig. 3C ); first subdiscal cell of fore wing open at apex ( Fig. 3C ); hind wing vein SC+R absent ( Fig. 3D ); hind wing vein cu-a absent or spectral ( Fig. 3D ); hind wing vein 1A incomplete ( Fig. 3D ); hind wing vein M+CU equal to or slightly greater than vein 1M ( Fig. 3D ); hind wing vein m-cu slightly curved toward wing apex or straight to wing margin but never angled toward wing base ( Fig. 3D ); hind coxa with a distinct baso-ventral tubercle; basal sternal plate of first metasomal tergum less than 0,25 length of tergum; metasoma sculptured on first three terga ( Fig. 2C ); ovipositor apex strongly sclerotized and with a single nodus ( Fig. 2D ).

Mononueuron is morphologically similar to Allorhogas , but it can be distinguished from members of this genus by having the vertex at least partially striate ( Fig. 2B ) (coriaceous in all described species of Allorhogas ); hind wing vein SC+R absent (present in all described species of Allorhogas except Allorhogas ingavera Marsh); hind wing vein cu-a absent or spectral (sclerotized or nebulose in most described species of Allorhogas , only spectral in Allorhogas argentinus Brèthes and Allorhogas shawi Marsh); hind wing vein 1A incomplete (always reaching vein cu-a in other described species of Allorhogas ); ovipositor long, about 1.5 times length of metasoma ( Fig. 3B ) (generally shorter than metasoma in most of the described species of Allorhogas , longer than metasoma in Allorhogas gallicola Gahan).

Figures

Figure 2. Mononeuron duguetiae Fischer (holotype, female) A head and mesosoma, lateral view B head and mesoscutum, dorsal view C metasoma, dorsal view D ovipositor.

Figure 3. A Galls on Duguetia furfuracea. B-D Mononeuron duguetiae Fischer (holotype, female). B Habitus, lateral view C fore wing D hind wing.