Allorhogas quarentenus, Joele & Zaldívar-Riverón & Penteado-Dias, 2021

Joele, Flavia R., Zaldivar-Riveron, Alejandro & Penteado-Dias, Angelica M., 2021, Six new species of Allorhogas (Hymenoptera, Braconidae, Doryctinae) from south and southeast Brazil with host-plant record, Journal of Hymenoptera Research 82, pp. 199-220 : 199

Allorhogas quarentenus sp. nov.

Diagnosis.

This new species is morphologically similar to the following species that also have been associated with legumes, with the first being described from Costa Rica and the remaining four from Brazil: A. infuscotarsus Marsh, A. brasiliensis Marsh, A. mineiro Zaldívar-Riverón & Martínez, A. spermaphagus Marsh and A. vulgaris Zaldívar-Riverón & Martínez. Allorhogas quarentenus can be distinguished from the latter five species by its dark brown tarsi (only hind tarsus brown in A. infuscotarsus ; yellow to honey yellow in the remaining species). Moreover, it can be distinguished from A. infuscotarsus and A. mineiro by having its ovipositor sheaths 0.6 times as long as metasoma (0.33 and 1.1-1.3 in the latter species, respectively); from A. brasiliensis by having 24-27 flagellomeres and forewing m-cu interstitial with 2RS (32-32 flagellomeres and forewing m-cu basal to 2RS in A. brasiliensis ); and from A. spermaphagus by having the propodeum basally coriaceous (rugulose-coriaceous in A. spermaphagus ).

Description.

Female. Body size 3.5 mm (Fig. 5A ), forewing 3.0 mm. Colour: body entirely honey yellow, scape honey yellow, pedicel brown, flagellomeres brown to dark brown; eyes silverish black; palpi yellow; legs yellow to honey yellow, tarsi dark brown; tarsal claws dark brown to black; wings hyaline, fore and hindwing veins dark brown basally, light brown apically, stigma brown; ovipositor sheaths dark brown to black, ovipositor honey yellow, apex strongly sclerotised.

Head: transverse in dorsal view, 1.8 times wider than its median length (dorsal view) (Fig. 5B, D ), 0.7 times as long as high (lateral view); occipital carina complete and reaching hypostomal carina before mandible; post ocellar line (POL) as long than ocellar diameter (OD), 0.6 times ocular ocellar line (OOL); frons, vertex, temple and gena coriaceous; face sparsely pilose, rugose-coriaceous, raised and smooth-coriaceous medially (Fig. 2C ); clypeus transversally rugose-coriaceous; area surrounding clypeus and gena pilose; frons excavation distinct but not defined by sharp lateral margins; eye 1.5 times longer than wide; eye width 2.0 times longer than temple in dorsal view; malar space 0.5 times eye height and 2.1 longer than width of hypoclypeal depression; mandibles tridentate, inner tooth considerably small and blunt; antenna with 27 flagellomeres, first flagellomere about 2.8 times longer than wide, 1.2 times longer than second one.

Mesosoma: 1.8 times longer than high (Fig. 5B ) and 1.5 times longer than wide (Fig. 5C ); pronotal collar short but visible in dorsal view, pronotal furrow slightly scrobiculate; mesoscutum transverse in dorsal view, its median length 0.8 times its width; mesoscutal lobes coriaceous, median lobe with indistinct median line; notauli wide, deep and scrobiculate, not meeting, reaching the end of scutellum in a rugose area with two distinct longitudinal carinae; scutellar disc coriaceous, prescutellar furrow with three transverse carinae; mesopleuron coriaceous, subalar groove wide, scrobiculate; precoxal sulcus wide, deep and coriaceous, running along two thirds of mesopleuron; metapleuron rugose-areolate, with sparse, large setae; propodeum basally coriaceous, with two distinct diverging carinae, rugose-areolate laterally and apically in areolar area.

Wings: forewing 2.8 times longer than wide (Fig. 5F ). Pterostigma 3.6 times as long as wide and 0.8 times as long as R vein. Vein r as long as 3RSa, 0.3 times as long as 3RSb, and as long as r-m. Vein 2RS interstitial with m-cu, vein RS+Mb absent. Hindwing vein M + CU 0.9 times as long as 1 M, m-cu slightly curved towards wing apex.

Legs: hind coxa with distinct, pointed basoventral tooth. Hind femur 3.7 times longer than wide.

Metasoma: first tergite 1.6 times wider than long, longitudinally costate-rugulose and coriaceous, with costate carinae partially indistinct basally, smooth medio-apically, with two distinct longitudinal subparallel carinae; basally delimited by a transverse carina (Fig. 5E ). Second tergite longitudinally costate, line between second and third tergites distinct and slightly sinuate, third tergite longitudinally costate-rugulose on basal half, slightly punctate on apical half; remaining tergites slightly punctate to smooth. Ovipositor sheaths 0.6 times as long as metasoma.

Variation.

Body size 3.1-3.8 mm. Metasoma honey yellow to yellow. Most part of lateral mesoscutal lobes dark brown (four specimens). Fore and middle tarsi honey yellow, brown or dark brown. Antenna with 24-27 flagellomeres. Prescutellar furrow with 2-3 transverse carinae.

Male. Similar to female. Body size 2.7-3.1 mm. Most part of lateral mesoscutal lobes dark brown (one specimen). Antenna with 25-27 flagellomeres. Hind femur swollen, 2.3-2.9 times longer than wide.

Holotype.

Female (DCBU 420473). Brasil, SP, Paraibuna; Feb.2012; frutos de Inga sp.

Paratypes.

(DCBU 420475-84; IBUNAM). 6 females, 1 male, same data as holotype; 8 females, 3 males. Brasil, MG, Janaúba, 15°49'41"S, 43°16'27"W; AM-161, 23.I.2019, 28.I.2019, 12.II.2019; B. R. Abreu col.

Biology.

The type specimens of A. quarentenus were reared from legumes of an undetermined species of Inga .

Etymology.

The name of this species refers to the COVID-19 pandemics with its subsequent undefined quarantine, which occurred while the authors were describing it.

Remarks.

Specimens of A. quarentenus and A. vulgaris could be either uniformly honey yellow or with dark brown areas. However, in the former species they are only present along the lateral mesoscutal lobes (also present in the basal areas of propodeum and central areas of second to fourth tergites in A. vulgaris ).

Figures

Figure 2. A spherical gall on a stem of Copaifera langsdorffii Desf. (Fabaceae) from where A. copaiba sp. nov. was reared B A. ilexaffinis sp. nov., head, frontal view C A. quarentenus sp. nov., head, frontal view D A. inquilinus sp. nov., head, frontal view E A. vassununga sp. nov., head, dorsal view F A. viridis sp. nov., head, frontal view.

Figure 5. Allorhogas quarentenus sp. nov. (female, holotype) A habitus, lateral, view B head and mesosoma, lateral view C head and metasoma, dorsal view D head, dorsal view E metasoma, dorsal view F wings.