Procantonnetia opacithorax Maruyama

Maruyama, Munetoshi, Matsumoto, Takashi & Itioka, Takao, 2011, Rove beetles (Coleoptera: Staphylinidae) associated with Aenictus laeviceps (Hymenoptera: Formicidae) in Sarawak, Malaysia: Strict host specificity, and first myrmecoid Aleocharini, Zootaxa 3102, pp. 1-26 : 17-19

Procantonnetia opacithorax Maruyama , sp. nov.

( Figs. 63–73 )

Holotype, 3 “ MALAYSIA: Sarawak, Lambir Hills National Park, 25 IV 2004 Matsumoto T. leg. / ATTM 711 / HOLOTYPE Procantonnetia opacithorax Maruyama ” (no. 711). Paratypes: 19, same data as holotype (no. 711); 16, ditto but 24 VII 2008, M. Maruyama leg. (no. MM2008). See, Table 1 for detailed collecting data.

Symbiotic host. Morphotype L2 of Aenictus laeviceps .

Distribution. Malaysia (Borneo).

Etymology. Combination of the Latin opacus (=opaque, matte) and thorax (= thorax), bringing attention to the opaque thorax.

Description. Almost uniformly brown. Head ( Figs. 63–66 ) around “neck” coarsely punctate with microsculpture, with 10–15 small setae around temple and 1 seta between eyes. Pronotum ( Fig. 67 ) with ratio length /width =1.38–1.46, with surface coarsely punctate except for midline which is glabrous, with 1 seta at middle. Elytra with entire surface coarsely punctate, with 15–20 setae from middle to apices. Abdomen ( Figs. 68–70 ) with numbers of macrosetae from tergite II–VIII: 3, 5, 1, 1, 3, 6. Male: median lobe of aedeagus ( Figs. 71, 72 ) slightly dilated near apex in lateral view. Female: spermatheca ( Fig. 73 ) with basal part with a large basal projection; apical lobe small, with inner wall not wrinkled.

Measurements. BL, ≈ 3.0–3.4; FBL, ≈ 1.7–1.9; HW, 0.55–0.63; EL, 0.241–0.262; AL, ≈ 1.7–1.8; PL, 0.78– 0.83; PW, 0.53–0.60; ELW, 0.89–0.96; HTL, 1.26–1.35. N=5.

Diagnosis. This species is most similar to Procantonnetia borneensis Kistner, 1993 in having pronotum and elytra coarsely punctate, but is distinguishable from the latter by the presence of setae on the pronotum and the number of the macrosetae on the abdominal tergites ( Kistner, 1993: 269).

Figures

FIGURES 63 – 70. Procantonnetia opacithorax sp. nov. (65 – 70, SEM photographs). 63, Habitus, dorsal view; 64, ditto, lateral view; 65, head, pronotum and anterior part of elytra, lateral view; 66, head, dorsal view; 67, pronotum, dorsal view; 68, abdomen, dorsal view; 69, ditto, lateral view; 70, ditto, ventral view.

FIGURES 71 – 73. Procantonnetia opacithorax sp. nov. (71, 72, holotype). 71, Median lobe of aedeagus, lateral view; 72, ditto, ventral view; 73, spermatheca.