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Siricidae (Hymenoptera: Symphyta: Siricoidea) of the Western Hemisphere
CJAI 21, July, 2012
doi: 10.3752/cjai.2012.21
Nathan M. Schiff, Henri Goulet, David R. Smith, Caroline Boudreault, A. Dan Wilson, and Brian E. Scheffler

Genus Afrotremex Pasteels

Fig. C30.1 (female habitus)

Afrotremex Pasteels, 1951: 195. Type species: Tremex hyalinatus Mocsáry, 1891: 158, by original designation. Smith 1978: 90.


We studied two females, we assumed that following character states, unless specified otherwise, apply to both sexes.

Head. Minimum distance between inner edges of eyes 1.2 times as long as maximum eye height (Fig. C30.2, in red), distance between inner edges of antennal sockets 6.0 times distance between outer edge of antennal socket and nearest inner edge of eye (Fig. C30.2, in white), distance between inner edges of lateral ocelli 1.5–2.0 times as long as distance between outer edge of lateral ocellus to nearest edge of eye (Fig. C30.2, in black). Head with setae, except those on occiput, clubbed at apex (Fig. B1.37). Antenna with 12–14 flagellomeres, the flagellomeres flattened dorsoventrally, and flagellomere 1 0.5 times as long as flagellomere 2 (Fig. B1.33).

Thorax. Pronotum in dorsal view finely pitted with numerous prominent shiny teeth (Fig. C30.3). Mesoscutum sublaterally with smooth longitudinal band, anterolateral corner with large pits, (submedially on inner side of smooth longitudinal band) with coarse and irregular pits, with numerous prominent shiny teeth, and medially with fine pits (Fig. C30.3). Fore wing without vein 2r–m, with vein 1cu–a aligned or almost aligned with vein M, with cell 2R1 0.6 times as long as cell 3R1, with vein 2r-rs joining stigma in apical third, with stigma before junction with vein 2r-rs parallel and beyond junction abruptly attenuated (Fig. C30.4), with vein 2A at or near posterior margin of wing only near vein a (Fig. C30.4), and with vein 3A extending along wing margin. Hind wing without anal cell 1A, with hamuli present only apical to junction of veins R1 and C (as in Fig. B1.12), with vein 1r–m clearly shorter than vein M, and with vein M moderately curved.

Abdomen. Female. Tergum 9 with median basin clearly longer than wide and flat, without setae or pits but with many small tubercules (Fig. C30.5). Cornus about 0.5 times as long as median basin length, triangular with large tooth-like projection laterally at base, and without cercus on lateroventral surface (Figs. C30.6 & C30.7). Sculpticells on surface of most abdominal terga extremely deeply pitted especially in pits of tergum 9 (Fig. A3.13). Sheath. Length of basal section 1.6–1.7 times as long as apical section, and total length 0.75 times as long as fore wing length, with few teeth subdorsally in apical 0.25 of apical section (Fig. C30.8). Ovipositor. Lancet annuli starting at base, and each annulus edge with one pit and without deep trough (Fig. 30.9).


Two sub–Saharan African species are known, A. hyalinatus (Mocsáry) from Gabon, Uganda, and Zaire [Democratic Republic of Congo] and A. violaceus Pasteels, 1951, from the Congo [Democratic Republic of Congo] (Smith 1978, Taeger and Blank 2011, Taeger et al. 2010). There are no keys, but the species are characterized by Pasteels (1951). We examined two females from Uganda, and Congo (USNM) representing two species near A. hyalinus.