Trachusa ovata (Cameronı 1902)

Kasparek, Max, 2019, A new species in the Trachusa ovata species group (Hymenoptera: Apoidea) from Peninsular Malaysia with an overview of the old-world species within the genus Trachusa, Journal of Natural History 53 (17), pp. 1079-1094 : 1089-1090

Trachusa ovata (Cameronı 1902)

( Figures 4 – 8 )

Material examined

Female holotype in NHMUK: ‘ B.M. type Hym. 17a1957a/selected as type by Pasteels / NHMUK 010265029 / Matang 3600 ʹ June 1900 / Protoanthidium ovatum Cam . Borneo ’. Specimen photographed by D. Notton ( NHMUK). – Female apparently from the type series in coll. Mavromoustakis (“ P. Cameron coll. 1914 – 110/Malavy June 1900 / Paraanthidium ovatum Cam. Borneo ”) (photograph in Kasparek 2017). – Female in SEMC (“ Protanthidium ovatum (Cam.) D. B. Baker det. 1991/ D&M Baker Collection KUNKUNHM 2004-En-004/ SEMC0974791 KUNHM-Ent/ Matang 3200 ft. Apl. 1902/ Sarawak Kuching distr. Mt. Matang / OUM ”). – Female in SEMC (‘ Borneo 1909 C. J. Brooks / Trachusa (Protanthidium) ovata Cameron. Det. C. D. Michener / SEMC 1321053 KUNHM-ENT ’) .

Description

Descriptions of the female are given by Cameron (1902), Mavromoustakis (1936), Pasteels (1972; with line drawings) and Kasparek (2017; with photographs including holotype). The male is known from a single male described by Mavromoustakis (1936), but the specimen could not be located in cMav or NHMUK, where the majority of Mavromoustakis ’ material is deposited.

Distribution

Malaysia. Only known from the State of Sarawak on the Island of Borneo ( Figure 9 ). All records for which the specific location is known are from Mount Matang in Kuching district.

Biology

Flight season June. No further details known.

Identification Key

The identification key given by Kasparek (2017) for the genus Trachusa can be modified for females in the following way:

1 Body entirely black ............................................................................................................................... 2 Body with yellow colouration on metasoma (if yellow colouration on terga inconspicuousı then also clypeus yellow)................................................................................................ 3

2 Mandible with three teeth (one large tooth and two smaller, flattened teeth which are often not clearly separated from each other); subantennal suture straight; axillae fused with scutellum, scutellum without median emargination; body with dense pubescence (Palaearctic)....................................... ....................................... T. (Trachusa) byssina Mandible with five equidistant teeth (one large and four smaller teeth decreasing in size from distal to proximal) or with one large apical tooth and an edentate tooth ridge (some undulations may indicate teeth); subantennal suture arcuate outward; axillae clearly separated from scutellum, scutellum notched in the middle; terga with only scattered hair (Indomalayan)................................................................................................. 2a

2a One apical tooth and four discrete inner teeth; inner half of the forewing strongly brown infuscated, outer half milky white; distance between punctures on T2 one to two times their diameter; marginal area of T2 dark brown, narrow impunctate margin ......................................................................................................................... T. (Paraanthidium) ovata One apical tooth and an edentate tooth ridge (some undulations indicate merged teeth); fore wing light brown infuscated with the area beyond the wing cells somewhat lighter than the inner two thirds of the wing; distance between punctures on T2 one to two times their diameter, marginal area of T2 black, relatively wide impunctate margin ........................................................................... P. (Paraanthidium) tenebrosa sp. n.

Figures

Figure 4. Mandibles of the females of Trachusa tenebrosa sp. n. (left) and T. ovata (right). The apical tooth is broader, and the inner teeth merged to a tooth ridge in T. tenebrosa as compared to T. ovata.

Figure 5. Mandibles of the females of Trachusa tenebrosa sp. n. (left) and T. ovata (right).

Figure 6. Wings of Trachusa tenebrosa sp. n. (female holotype, top), T. ovata (female holotype, below). – Photographs by the author and D. Notton, NHMUK.

Figure 7. Punctation of T2 of Trachusa tenebrosa sp. n. (left) and T. ovata (specimen from SEMC; right). Note the finer punctation with wider interstices and the broader impunctate apical margin in T. tenebrosa sp. n.

Figure 8. Abdominal terga of Trachusa tenebrosa sp. n. (left) and T. ovata (right). Note the denser punctation with larges punctures in T. ovata.

Figure 9. Distribution of Trachusa (P.) tenebrosa sp. n. and T. (Paraanthidium) ovata.