Brachycyrtus muesebecki Walkley, 1956

Nascimento, Alexsandra C. & Fernandes, Daniell R. R., 2024, Synopsis of Brachycyrtus Kriechbaumer, 1880 (Hymenoptera: Ichneumonidae: Brachycyrtinae) from Brazil, with description of two new species, Zootaxa 5430 (1), pp. 1-62 : 30

Brachycyrtus muesebecki Walkley, 1956

( Fig. 36 )

Habryllia muesebecki Walkley, 1956: 319 . Holotype female, Brazil (USNM) [ National Museum of Natural History , Smithsonian Institution].

Brachycyrtus muesebecki Walkley, 1956:319 .

Material examined. 1 ♀. Holotype ♀ (scanned image) ( Fig. 36 ). BRAZIL, RdJaneiro [Rio de Janeiro]/ 1938// YelFervServ/ MESBrazil/ RCShannon// Type No. 62053/ U.S.N.M. [National Museum of Natural History, Smithsonian Institution]// Habryllia / muesebecki / det wlkl. [ Walkley ] / 1956Wlkl [ Walkley ] // USNMENT 01524816 (http://n 2t.net/ark:/65665/380e63e11-76f1-4921-aed0http://n 2t.net/ark:/65665/380e63e11-76f1-4921-aed0-b522dd 89706db522dd89706d) (1 ♀, USNM).

Diagnosis. Brachycyrtus muesebecki can be differentiated from other Neotropical Brachycyrtus by the combination of the following characters: metanotum with spot black; propodeum with the posteroexterna and area dentipara confluent, posterior transverse carina absent.

Male. Unknown.

Geographical records. Brazil (Rio de Janeiro, Paraná) ( Walkley 1956; Yu et al. 2016; Fernandes et al. 2023) ( Fig. 37 ).

Biological note. The host of this species is so far unknown.

Discussion. Brachycyrtus muesebecki is morphologically similar to B. obelix , ocelli forming an equilateral triangle, clypeus 2.0 ×as wide as it is long, truncated apically. In B. obelix metanotum without spot, propodeum with the posteroexterna and area dentipara separated, posterior transverse carina present lateromedially. In contrast, in B. muesebecki metanotum with spot black, propodeum with the posteroexterna and area dentipara confluent, and posterior transverse carina absent.

Figures

FIGURE 36A–D. Brachycyrtus muesebecki Walkley, 1956, holotype female. (A) habitus; (B) head, frontal view; (C) body, dorsal view; (D) tags. Photos: (A, B, C and D) Natasha Yong.

FIGURE 37. Map of geographical records of Brachycyrtus muesebecki Walkley, 1956 (Legend: the Brazilian states of Rio de Janeiro and Paraná where the species occurs is highlighted in gray. Red triangle for previous record and yellow star for type locality).