Cavelerius yunnanensis, Gao & Zhou, 2021

Gao, Cuiqing & Zhou, Yu, 2021, Review of the genus Cavelerius (Heteroptera: Blissidae) with descriptions of three new species from China and Southeast Asia, Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 61 (1), pp. 113-132 : 131

Cavelerius yunnanensis sp. nov.

( Figs 13e, f; 16 )

Cavelerius excavatus (misidentification): ZIJൾඇǤ & Zඈඎ (1981: 70).

Type material. Hඈඅඈඍඒඉൾ: CHINA: J, Yඎඇඇൺඇ, Yuanjiang county, Mili township / 21.vii.2006 / coll. Xueqin Shi [pr] ( NKUM).Pൺ*©ൺඍඒඉൾඌ: CHINA: 9 JJ, 21–22.vii.2006, same as holotype ( NKUM); 6 JJ 1 ♀, Yඎඇඇൺඇ, Yuanjiang county, Mili township / 17–22.vii.2006 / coll. Zhonghua Fan [pr] ( NKUM); 1 J, same data / 17.vii.2006 / coll. Xueqi Shi, Jimeng Hua [pr]. 19 JJ, Yඎඇඇൺඇ, Hekou, 80m, 11.vi.1956, coll. Keren Huang et al. ( IZAS); 1 J, Yඎඇඇൺඇ, Xishuangbanna, Jinghong, 910m, 25.vi.1958, coll. Yiran Zhang ( IZAS).

Description. Moderately sized. Colouration. Head, pronotum, scutellum, and abdomen black. First antennal segment yellow, approximately basal half of second antennal segment yellow; posterior part of second and whole third segment brown, fourth segment blackish brown. Hemelytra white to pale yellow. Inner margins and commissure of clavus pale brown and vein A1 pale yellow to pale brown. Inner corial vein brown except for basal one - third pale yellow. Terminal one-third of corium blackish brown. Apical corial margin blackish brown. Membrane almost completely brownish black with small yellowish white areas adjacent to apex of corium and apex of membrane. Legs uniformly brownish yellow.

Structure. Head broad, tip of clypeus extending forward to apical one-third of first antennal segment. Pronotum with lateral margins slightly sinuate, narrowest at transverse impression. Punctures on anterior lobe small and deep. Width of posterior lobe slightly broader than that of anterior lobe. Punctures on posterior lobe scattered. Posterior margin of pronotum slightly concave. Membrane extending caudad at most onto tergite VII. Abdomen slightly wider than hemelytra. Labium extending onto mesosternum.

Spiracles on laterotergite II about one - fifth as large as total width of laterotergite II there ( Fig. 16b ). Apical part of pygophoral dorsal opening oval, slightly narrower than basal part ( Fig. 16c ). Outer lobe of paramere long and slightly pointed; inner lobe of paramere rounded and oriented to base; blade distinctly curved, apex pointed ( Figs 16d–g ). Phallus shown in Figs 16h–k . Wings of sperm reservoir widest near middle, about three times longer than wide ( Fig. 16h ).

Measurements (male, n = 2; mm). Body length 6.57– 6.67; maximum width 1.59–1.63. Head: length 0.52–0.71; width across eyes 1.00–1.04; interocular space 0.70–0.71; interocellar space 0.38–0.40; eye–ocellus space 0.16–0.17; eye length 0.19–0.21; eye width 0.17. Length of antennal segments: I – 0.21, II – 0.60–0.66, III – 0.58–0.65, IV – 0.86–0.93. Length of labrum 0.70–0.90; lengths of labial segments: I – 0.47–0.49, II – 0.55–0.57, III – 0.48, IV – 0.34–0.45. Thorax: Pronotum, median length 1.07–1.18; width at posterior margin 1.58–1.66; width at anterior margin 1.47–1.49. Scutellar length 0.59–0.70, width 0.78–0.81. Length of hemelytra 3.70–4.08; length of corium 2.14–2.25; claval commissure 0.60–0.70.

Differential diagnosis. Twenty male specimens from Yunnan (Hekou, Jinghong) were misidentified as C. excavatus in ZIJൾඇǤ & Zඈඎ (1981: 70, Figs 226, 240, pl. 11: 101), but can be separated by the colouration of membrane, the size of spiracles and the shape of paramere, which were shown in the key.

The new species is similar to C. tinctus in its size, antennal and leg colouration, and shape of pronotum, but the brown spot on membrane is distinctly larger, covering the whole membrane except for small areas at apex and hemelytra extends caudad onto tergite VII (vs. brown spot close to or slightly contiguous to lateral membranal margins and hemelytra only extends caudad onto tergite VI in C. tinctus ).

Cavelerius yunnanensis sp. nov. is also similar to C. antennatus in the large brown area on membrane and in leg colouration, but body is larger (6.57–6.67 mm), the posterior lobe is wider than the anterior lobe of pronotum, the inner and outer lobe of paramere is slightly longer (vs. body smaller (5.76–6.23 mm), the lateral sides of pronotum almost parallel and the lobes of paramere shorter in C. antennatus ).

Etymology. The specific name, yunnanensis , refers to the locality of the type specimens; adjective.

Distribution. China (Yunnan).

Figures

Fig. 16. Cavelerius yunnanensis sp. nov. a – male abdominal dorsum, dorsal view; b – basal part of male abdominal dorsum, enlarged; c – pygophore, posterodorsal view; d–g – left paramere, four different aspects; h–i – phallus, dorsal and lateral view; j–k – vesica, dorsal and lateral view.