Burmasphex pilosus, Melo & Rosa, 2018

Melo, Gabriel A. R. & Rosa, Brunno B., 2018, New genus of fossil apoid wasps (Hymenoptera, Apoidea) from the Cretaceous amber of Myanmar, Revista Brasileira de Entomologia (Rev. Bras. Entomol.) 62 (4), pp. 319-323 : 321-322

† Burmasphex pilosus sp. nov.

urn:lsid:zoobank.org:act:583665C0-5FFA-4B7A-A8DA-63E31D6357CD

( Figs. 7–14 )

Diagnosis and remarks. Diagnostic features for separating the two species described in † Burmasphex gen.nov. are presented above in the description of † Burmasphex sulcatus sp. nov.

Description. Holotype male. Measurements (in mm). Approximate body length, 6.2; maximum head width, 1.2; forewing length, 3.6. Similar to † Burmasphex sulcatus sp. nov. except as follows: Coloration. Head mostly dark brown; clypeus, antennae, mandibles and mouthparts dark reddish brown. Pronotum, fore legs, mesoscutum, scutellum, metanotum, metaposnotum, metapleura and propodeum mostly dark brown; mid and hind legs reddish brown. Wing membrane hyaline, veins and pterostigma dark. Metasoma mostly dark; sternum 8 dark reddish brown. Pilosity. Mostly short, dense and conspicuous; upper portion of gena with short pubescence; pronotum with dense pubescence, longest setae about as long as 3× ocellar diameter; lateral propodeum with conspicuous erect pilosity, longest setae about as long as 5× ocellar diameter; metasoma with conspicuous erect pilosity, whose length and diameter increase toward apex of metasoma, longest setae about 3× as long as ocellar diameter; sterna with erect pilosity; posterior margin of sternum 8 with loose fringe of very long setae, their length over 4× ocellar diameter. Integumental surface. Transverse carina separating dorsal and posterior surfaces of propodeum with a gap medially, the portions surrounding the gap raised and forming a lobe; medial sulcus on dorsal surface shallow; lateral carina of dorsal surface prominent. Structure (measurements in mm). Head transverse in frontal view, about 1.7× wider than long (1.2:0.70); malar space slightly shorter than ocellar diameter (0.04:0.05); clypeus very short, almost 6× wider than long (0.65:0.11); interalveolar distance slightly longer than alveolus diameter (0.13:0.11). F1–F3 slender, respectively about 4.1, 4.6 and 4.4× longer than wide (0.33:0.08; 0.37:0.08; 0.35:0.08); F4–F10 progressively decreasing in length; eye about 1.4× as long as its maximum width in lateral view (0.67:0.47); distance between posterior ocelli longer than ocello-orbital distance. Legs slender, femur of hind leg longer than tibia (0.96:0.87). Wing venation as for genus, except for vein 1m-cu touching M slightly apically to its bifurcation with Rs. Constriction at base of 3rd tergum less strong than that at base of 2nd tergum.

Type material. Holotype male, a small, complete, fully winged, well-preserved specimen in amber piece DZUP Bur- 448. The piece has abundant particulate material in the matrix that partially hinders the visibility of the specimen. Except for a very small mite and plant hairs, there are no other syninclusions.

Etymology. The species is named for its abundant pubescence, from the Latin pilus, hair, felt, and –osus, having the nature or quality of.

Figures

Figs. 7–10. †Burmasphex pilosus gen. et sp. nov. from Cretaceous amber from Myanmar; male holotype (DZUP Bur-448). 7, Lateral habitus; 8, Head and mesosoma, lateral view; 9, Mesosoma, lateral view; 10, Metasoma, lateral view. Scale bars: 2 mm (Fig. 7); 0.5mm (Figs.8–9); 1 mm (Fig. 10).

Figs. 11–14. †Burmasphex pilosus gen. et sp. nov.from Cretaceous amber from Myanmar; male holotype (DZUP Bur-448). 11, Head, frontolateral view; 12, Pronotum, lateral view; 13, Mesopleura and propodeum, lateral view; 14, Apex of metasoma, lateral view. Scale bar: 0.5mm.