Trilobitofoenus plaumanni Macedo

Macedo, Antonio Carlos Cruz, 2009, Generic classification for the Gasteruptiinae (Hymenoptera: Gasteruptiidae) based on a cladistic analysis, with the description of two new Neotropical genera and the revalidation of Plutofoenus Kieffer, Zootaxa 2075, pp. 1-32 : 21-23

publication ID

https://doi.org/ 10.5281/zenodo.187219

DOI

https://doi.org/10.5281/zenodo.6213194

persistent identifier

https://treatment.plazi.org/id/03C987B2-B72F-3738-FF7B-90CDFCAC298D

treatment provided by

Plazi

scientific name

Trilobitofoenus plaumanni Macedo
status

sp. nov.

Trilobitofoenus plaumanni Macedo n. sp.

( Figs. 5 View FIGURE 5. a – b , 6g View FIGURE 6. a – g , 7 View FIGURE 7. a – b g, 8b, 11k–l, 12f, 13h, 14f, 15)

Holotype. Female. Type locality: BRAZIL: Santa Catarina: Nova Teutônia, 24.XII.1948, F. Plaumann ( BMNH). Label: BRAZIL: Nova Teutônia 24.xii.1948 Fritz Plaumann B.M. 1957–341.

Paratypes. Six females. BRAZIL: Nova Teutônia 24.xii.1948 Fritz Plaumann B.M. 1957–341, 3 Ƥ (one missing metasoma beyond segment 3) ( BMNH); BRAZIL: Nova Teutônia 6.1.1949 Fritz Plaumann B.M. 1957–341, 1 Ƥ ( BMNH); Nova Teutônia Santa Catarina XII–15–55 Braz Fritz Plaumann, 1 Ƥ ( AEIC); BRASIL Nova Teutônia Santa Catarina 16/XII/1948, Dirings, 1 Ƥ (missing antennae beyond 1st flagellomere, left hind leg and middle legs beyond femur, and entirely metasoma) ( MZSP).

Etymology. The name of this species is in honor of Fritz Plaumann, a German entomologist who lived in southern Brazil and collected most the examined specimens.

Diagnosis. Differs from T. alvarengai by the presence of the discal cell ( Fig. 7 View FIGURE 7. a – b g) (absent in T. alvarengai ). Differs from T. sericeus by the presence of the discal cell ( Fig. 7 View FIGURE 7. a – b g) (absent in T. sericeus ), and by the mesoscutum striate posteriorly ( Fig. 12 View FIGURE 12 f) (areolate rugose in T. sericeus ).

Description. Female. Length: 12.7 mm (10.9–14.4 mm) (n=5: holotype, 3 paratypes from BMNH, paratype from AEIC); ovipositor sheath length 0.46 (0.41–0.50)X body length.

Head. Dark brown, imbricate, as long as wide ( Fig. 11 View FIGURE 11 k); head length 1.32 (1.29–1.35)X eye length; eye length 21.50 (17.33–28.50)X malar space; distance from posterior ocellus to occipital margin 3.25 (3.17–3.42)X distance between posterior ocelli; 1st flagellomere 1.16 (1.11–1.19)X as long as scape, 2.43 (2.10–2.71)X as long as pedicel, 1.10 (1.05–1.19)X as long as 2nd flagellomere; mandible medial tooth distinct; frontal carina absent; posterior ocellus inserted at level of upper eye margin ( Fig. 11 View FIGURE 11 k); occipital carina wider dorsally than laterally.

Mesosoma. Predominantly black, dorsal and lateral lobes of pronotum red brown; fore and middle legs with coxa, trochanter and femur red brown, tibia and tarsus yellow brown; hind leg with coxa dark brown, trochanter, femur and tibia red brown, tibia with sub-basal portion yellow, tarsus dark brown; mesosoma (excluding propleuron) 1.36 (1.32–1.38)X as long as high; propleuron 1.26 (1.18–1.32)X longer than its largest wide, 0.95 (0.89–1.00)X pronotum length; metacoxa 2.22 (1.96–2.65)X as long as wide; metatibia 3.98 (3.79–4.17)X as long as wide, 1.28 (1.23–1.32)X as long as femur, 2.88 (2.84–2.93)X as long as 1st tarsomere; propleuron imbricate dorsally and sparsely punctate laterally; pronotal lobes imbricate, area between lobes crenulate ( Fig. 13 View FIGURE 13 h); mesoscutum with two distinct areas, imbricate anteriorly and striate posteriorly ( Fig. 12 View FIGURE 12 f); mesoscutellum imbricate; mesepisternum with dorsal portion imbricate and ventral portion areolate; mesepimeron scrobiculate; metapleuron areolate, ventral margin near middle coxa rugulose; propodeum areolate, median propodeal carina indistinct ( Fig. 14 View FIGURE 14 f); fore wing discal cell subtriangular, vein 2–Cu arched ( Fig. 7 View FIGURE 7. a – b g), vein r–m spectral ( Fig. 5a View FIGURE 5. a – b ); hind wing without pigmented veins; 3–4 hamuli (3/3: 14.3%, 3/4: 14.3%, 4/3: 28.6%, 4/4: 42.9%).

Metasoma. Dark brown, imbricate, 3.19 (2.97–3.57)X as long as mesosoma; ovipositor sheath dark brown, with apex yellow, 0.73 (0.67–0.81)X as long as metasoma ( Fig. 5 View FIGURE 5. a – b ).

Male. Unknown.

Distribution. Brazil (Santa Catarina) ( Fig. 15 View FIGURE 15 ).

Comments. Trilobitofoenus plaumanni is described from seven females, all collected in Nova Teutônia, Brazil, one of the best collected places in the entire Neotropics. In relation to the other Trilobitofoenus species, this is the only one that retained a discal cell. This cell is absent by parallelism in other Gasteruptiidae , including several Gasteruption and Pseudofoenus species.

AEIC

American Entomological Institute

MZSP

Sao Paulo, Museu de Zoologia da Universidade de Sao Paulo

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