Heptascelio castor Masner & Johnson, new species

urn:lsid:zoobank.org:act:0C211F50-3EBF-4C8A-87FD-61E4799F9346 urn:lsid:biosci.ohio-state.edu:osuc_concepts:223412 Figures 21–26; Morphbank28

Description. Female body length: 4.0–4.8 mm (n=18). Male body length: 4.2 mm (n=1). Body color of female: entirely dark, dark brown to black. Color of female antenna: dark brown to black throughout, extremities of A1, A2 lighter in color. Color of wing membrane: with weak general brown infuscation, longitudinal dark streak below submarginal vein moderately developed. Color of legs: coxae dark brown, femora largely brown, legs otherwise brownish yellow. Body color of male: head and mesosoma black, metasoma dark brown. Color of male antenna: brown.

Sculpture of occiput and posterior vertex: coarsely punctate. Sculpture of frons below ocellus in female: areolate rugose. Shape of dorsal margin of frontal scrobe: evenly arcuate, weakly produced. Sculpture of fronhttp://atbi.biosci.ohio-state.edu/HymOnline/map-large.html?id=223411 27. http://zoobank.org/urn:lsid:zoobank.org:specimen:9A8D4ABD-AC2D-4D9B-BAA6-BF523C25637C http://www.morphbank.net/?id=224265

tal depression in female: transversely rugose throughout. Sculpture of gena: areolate rugose, with distinct dorsoventral tendency. Setation of gena: with short, uniform setae, with few short bristles interspersed. Shape of mandibles: normal length, crossed transversely below head when closed, tips overlapping.

Sculpture of dorsal pronotum: areolate rugose, with distinct longitudinal tendency. Notaulus: absent or obscured by coarse surface sculpture. Sculpture of mesoscutum in female: longitudinally strigose, with strong transverse sculpture in interspaces. Sculpture of mesoscutum in male: longitudinally strigose, with strong transverse sculpture in interspaces. Parapsidal line: absent. Mesoscutellum shape: nearly parallel-sided, apex weakly excavate, with weak median longitudinal impression. Sculpture of female mesoscutellum: areolate rugose. Scutellar points of female: forming short, acute teeth. Sculpture of male mesoscutellum: areolate rugose. Scutellar points of male: narrow, short, acute. Posterior surface of propodeum: with distinct straight longitudinal paramedian keel arising from apex of inner propodeal projection. Length of outer propodeal projection in female: moderately elongate, not reaching midpoint of length of T1, subequal in length to inner propodeal projection. Sculpture of propodeum between inner and outer propodeal projections: largely smooth, with variably developed diagonal carinae. Netrion shape: moderately wide, nearly parallel-sided, weakly widened ventrally, with single column of large foveae. Netrion setation: densely setose. Sculpture of lateral pronotum posterior to epomial carina: coarsely rugulose throughout. Setation of posterior half of lateral pronotum: with numerous scattered setae, densest near spiracle. Sculpture of mesopleural scrobe: smooth. Sculpture of lower mesepisternum: rugulose to punctate. Sculpture of metapleuron: with smooth field in posteroventral quadrant, elsewhere areolate rugose. Fore wing venation: well-developed, with R, r-rs clearly visible. Submarginal vein bristles: with dark bristles extending length of submarginal vein. Long dark bristles on legs: absent.

T1 depression: moderately to densely setose. Sublateral lamella on T1: distinctly raised more or less perpendicular to T1. Sculpture of T2–T4: longitudinally striate, with fine cross striae, punctures, smooth or finely punctulate transverse band apically. Setation of laterotergites: setose. Sculpture of S2, S3 of female: strongly longitudinally rugose. Sculpture of S2, S3 of male: Distribution of felt fields: present on S2–S3.

Diagnosis. Most similar to specimens of Heptascelio hamatus having the frontal depression entirely sculptured (as in Fig. 42). Heptascelio castor may be distinguished by the well-developed and straight paramedial carinae on the propodeum and the striate sculpture between the medial and outer propodeal projections (Fig. 25).

Etymology. Named for one of the classical twins, because of its similarity to some specimens now placed in H. hamatus.

Link to Distribution Map.29

Material Examined. Holotype female: MALAYSIA: SE Sabah, nr. Danum Valley Field Centre, ~ 150 m, W0N0 / MT 5, 19.III–19.IV.1988, Malaise trap, C. van Achterberg & T. Burghouts, OSUC 186273 (deposited in CNCI)30. Paratypes (1 male, 24 females): INDONESIA: 3 females, OSUC 186278, 186279 (CNCI); OSUC 210352 (ROME). MALAYSIA: 1 male, 21 females, OSUC 202796 (AEIC); OSUC 207738–207742 (BMNH); OSUC 210296 (BPBM); OSUC 186269–186273, 186274–186277, 209032, 209203–209207 (CNCI).