Cavelerius antennatus Slater & Miyamoto, 1963

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 : 116-118

Cavelerius antennatus Slater & Miyamoto, 1963

( Figs 1a ; 2 )

Cavelerius antennatus Slater & Miyamoto, 1963: 147 ; Sඅൺඍൾ*© (1979:

79); Sඅൺඍൾ*© & O’Dඈඇඇൾඅඅ (1995: 48).

Material examined. INDIA: 2JJ, NE- INDIA. MൾGΗൺඅൺඒൺ Sඍൺඍൾ /W Garo Hills, Balphakram NP / 22–27.v.1996, 250– 550m / GPS N25°11′ E90°51′ (WGSB4) / coll. E Jendek, O Sausa [pr] ( NKUM); 3 JJ, NE - INDIA. MൾGΗൺඅൺඒൺ Sඍൺඍൾ / West Garo Hills reg., Tura / 5–7.v.1996, 600– 800m / GPS N25°30.7′ E90°13.9′ (WGS84) / coll. E Jendek, O Sausa [pr] ( NKUM).

Redescription. Moderate size. Colouration. Head, pronotum, scutellum, and abdomen black. First three antennal

segments bright orange-yellow or yellow, fourth antennal segment brownish black. Hemelytra dark yellow. Inner margins and commissure of clavus brown and vein A1 on clavus (Wඈඈඍඍඈඇ & Bൾඍඍඌ 1985) pale yellow to pale brown. Inner corial vein (vein Cu) brown except for about one-third of base that is pale yellow. Apical one-third of corium brownish black. Corial apical margin brown. Large irregularly dull brown spot covering central area of membrane, distinctly joined to apical margin of corium. Base of corium, small areas adjacent to apex of it and apex of membrane dull yellowish white. Legs uniformly orange yellow.

Structure. Head broad, tip of clypeus extending forward to apical one-third of first antennal segment. Pronotum with lateral margins slightly sinuate, and anterior lobe as broad or nearly as broad as humeral width. Transverse impression broad and shallow. Punctures on posterior lobe coarse. Postero - lateral lobes of pronotum slightly produced caudad. Posterior margin of pronotum slightly concave, with middle part slightly concave. Membrane extending caudad onto apex of tergite VI or base of tergite VII. Abdomen slightly wider than hemelytra.

Sutures between tergites III–IV slightly curved forward and those between tergites V–VI slightly curved caudad ( Fig. 2a ). Ostioles of dorso-abdominal scent glands present between terga IV & V and V & VI, the last distinctly wider ( Fig. 2a ). Spiracles on laterotergite II about one - fifth as large as total width of laterotergite II there ( Fig. 2b ). Apical part of pygophoral dorsal opening almost oval, distinctly narrower than basal part ( Fig. 2c ). Paramere with long and pointed outer lobe and short pointed inner lobe; blade of paramere distinctly curved, sickle-shaped, apex pointed ( Figs 2d–g ). Phallus shown in Figs 2 h–j : wings of sperm reservoir widest near base, about twice as long as wide ( Fig. 2j ).

Measurements (male, n = 3; mm). Body length 5.76– 6.23; maximum width 1.30–1.46. Head: length 0.62–0.68; width across eyes 0.92–1.00; interocular space 0.57–0.65; interocellar space 0.32–0.35; eye–ocellus space 0.13–0.19; eye length 0.23–0.25; eye width 0.17–0.18. Length of antennal segments I–IV: I – 0.21–0.24, II – 0.61–0.69, III – 0.59–0.62, IV – 0.81–0.83. Length of labrum 0.58; length of labial segments I–IV: I – 0.48, II – 0.54, III – 0.56, IV – 0.52. Thorax: Pronotum, median length 0.94–1.07; width at anterior margin 1.23–1.37; width at posterior margin

1.25–1.47. Scutellar length 0.55–0.67, width 0.73–0.74. Length of hemelytra 3.24–3.42; length of corium 1.90– 1.95; claval commissure 0.47–0.55.

Distribution. Myanmar (Sඅൺඍൾ*© & Mංඒൺආඈඍඈ 1963), India: Assam (Sඅൺඍൾ*© 1979), Meghalaya (new record).

Remark. The size of spiracles and the shape of the second outer laterotergite (not the apex of the seventh abdominal connexivum in Sඅൺඍൾ*© & Mංඒൺආඈඍඈ (1963, pl. 8, Figs 34–39)) are valuable specific characters in this genus.

Cavelerius excavatus ( Distant, 1901)

( Fig. 3 )

Macropes excavatus Distant, 1901: 467 ; Sඅൺඍൾ*© (1964: 495).

Cavelerius excavatus : Sඅൺඍൾ*© & Mංඒൺආඈඍඈ (1963: 140, 152); Sඅൺඍൾ*© (1979: 82); Sඅൺඍൾ*© & O’Dඈඇඇൾඅඅ (1995: 48).

Type material examined. Lൾർඍඈඍඒඉൾ (designated by Sඅൺඍൾ*© & Mංඒൺ- ආඈඍඈ (1963)): INDIA: Shillong [hw] // Distant Coll. / 1911-383[pr] // excavatus / type Dist. [hw] // Macropes / excavatus [hw] / Lectotype / J. A. Slater [pr] // Macropes / excavatus Dist. / Lecototype / J. Pericart, 1997 [hw] ( BMNH). We examined the photo ( Fig. 3b ).

Diagnosis. Head, pronotum, scutellum and abdomen black. First and second antennal segments white to pale yellowish except for brown apical fourth of second segment, third segment brown, fourth segment blackish. Postero-lateral lobes of pronotum slightly produced caudad. Hemelytra from nearly white to very light yellowish. Margins of clavus pale brown. Apical one-third of corium dark brown, inner vein of corium (vein Cu) pale brown. Membrane white except for brown spot covering central area of membrane which is usually adjacent to apical corial margin. Legs uniformly pale yellowish. Body length: 5.82 mm.

Distribution. India: Meghalaya (Dංඌඍൺඇඍ 1901).

a – dorsal view (HNHM); b – lectotype,labels (BMNH).

Caveleriusillustris Distant, 1903

( Fig. 4 )

Cavelerius illustris Distant, 1903a: 44 ; Dංඌඍൺඇඍ (1903b: 24); Sඅൺඍൾ*© &

Mංඒൺආඈඍඈ (1963: 148); Sඅൺඍൾ*© (1964: 462); Sඅൺඍൾ*© (1979: 79,.80)

Type material examined. Pൺ*©ൺඍඒඉൾ:J, MYANMAR: Upper Burma

/ Taunggye [hw] // Distant Coll. / 1911-383 [pr]. // DONATION FROM

/ J. A. SLATER / COLLECTION [pr] // Cavelerius / illustris Dist. [hw]

/ det. R.J. Izzard. 195 [pr] 6 [hw] / PARATYPE [hw] ( AMNH). We examined the photos ( Fig. 4 ).

Diagnosis. Head, pronotum, scutellum and abdomen black. First antennal segment bright-yellow, second, third and fourth segments bright reddish brown. Postero-lateral lobes of pronotum distinctly produced caudad and acutely pointed, so posterior margin of pronotum very deeply concave. Clavus dark yellowish and inner margin of clavus infuscated. Corium dark yellowish, apical one-third of corium chocolate except for reddish brown extreme apex and infuscated inner vein of corium (vein Cu). Membrane almost uniformly brown except for small areas adjacent to apex of corium, basal angle and extreme tip that are pale yellowish. Legs bright orange-yellow, sometimes becoming darker on femora. Body length: 6 mm.

Sඅൺඍൾ*© & Mංඒൺආඈඍඈ (1963: 147, Fig. 46) recorded two specimens with postero-lateral lobes of pronotum much less strongly developed than the others, produced caudad, much shorter and terminally rounded.

Distribution. Myanmar (Dංඌඍൺඇඍ 1903a), Malaysia (Sඅൺ- ඍൾ*© 1979).

Figures

Fig. 1. Cavelerius spp. a – C. antennatus Slater & Miyamoto, 1963, dorsal view; b–c – C. tinctus (Distant, 1903), dorsal and ventral view; d – C. minor Slater & Miyamoto, 1963, dorsal view; e–f – C. saccharivorus (Okajima, 1922), dorsal and ventral view.

Fig. 2. Cavelerius antennatus Slater & Miyamoto, 1963. 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 – sperm reservoir and adjoining portion of phallus, dorsal view.

Fig. 3. Cavelerius excavatus (Distant, 1901).

Fig. 4. Paratype of Cavelerius illustris Distant, 1903 and labels. a – paratype, dorsal view; b – paratype, ventral view; c – labels (Photographed by Steve Thurston, AMNH).