Caiaptera picea Bai & Heiss
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|Caiaptera picea Bai & Heiss|
Caiaptera picea Bai & Heiss , n. sp.
( Figs. 7–9View FIGURES 7 – 12, photo 1–3)
Material examined. Holotype, 3, glued on card and labelled: China, Hainan / Diaoluo mountain / 2008 V 9 Bai XS / Ent. Mus. IMNU. Huhhot // Holotype, 3 / Caiaptera n. gen. / picea n.sp. / des. Bai & Heiss 2011 ( EMIH); paratypes: 131 Ƥ China, Hainan, Tongzha / Wuzhisan / 2009 V 6 Zhang & Yang / Ent. Mus. CAU, Beijing ( CAU); 232 Ƥ China, Hainan, Jianfeng / Tianchi, 810m / 2007 VIII 16, Zhang & Bai / Ent. Mus. CAU, Beijing ( CAU, CEHI); these are designated and labelled accordingly.
Description. Male, apterous; of piceous coloration, surface shiny with deep punctures on thorax and abdomen.
Head. Slightly longer than wide (17 / 16); clypeus and thin genae of same length reaching 1 / 3 of antennal segment I; antenniferous lobes subacute shorter than clypeus, surface granulate; antennae with fine granulation 2.28 x as long as width of head (36.5 / 16), segment I thickest constricted and without granulation on basal 1 / 3, II shorter and thinner gradually enlarged toward apex, III longest and cylindrical, IV fusiform with pilose apex; length of segments I/II/III/IV = 11 / 6 / 13 / 6.6; eyes large inserted in head; postocular lobes converging toward collar with a distinct posteriorly projecting tubercle; vertex with two granulate ridges flanked by ovate depressions laterally. Rostrum arising from a slit-like atrium, as long as head, rostral groove with carinate lateral margins, closed posteriorly.
Pronotum. Trapezoidal 3.7 x as wide as long (24 / 9), lateral margins consisting of two carinae, upper one roundly converging anteriorly, lower one straight reaching to anterior margin of ring-like collar and separated by a deep incision; disk with a longitudinal groove at middle on posterior half, lateral sclerites with round callosities; posterior margin sinuate fused to mesonotum but separated by a deep suture.
PHOTOS 1–9. 1,2,4– 8 dorsal view, 3,9 ventral view. 1 Caiaptera picea n. sp. male; 2 Caiaptera picea n. sp. female; 3 Caiaptera picea n. sp. male; 4 Hainanmezira latiscutellata n. sp. male, 5 Hainanmezira latiscutellata n. sp. female; 6 Hainanmezira sp. 2 female; 7 Notoplocaptera hainanensis n. sp. male, 8 Notoplocaptera hainanensis n. sp. female; 9 Hainanmezira sp. 2 female.
Mesonotum. Strongly transverse (29 / 5); lateral margins also carinate and converging anteriorly, disk at middle smooth and triangularly elevated toward posterior margin, laterally with deep pits followed by a round callosity, posterior margin straight and sulcate fused to metanotum.
Metanotum. Forming a trapezoidal continuous plate with fused mtg I+II, metanotum with 2 (1 + 1) sublateral conical elevations with a posteriorly sloping depression between them; mtg I+II depressed laterally of the median ridge with small round callosities; posterior margin straight, a thin suture separates it from tergal plate.
Abdomen. Tergal plate subrectangular, flat with shallow depressions and round callosities marking the apodemal impressions, only slightly raised at middle on mtg IV –VI; deltg II –VII laterally raised their margin carinate and doubled, disk with a round depression and twi small callosities; deltg II+III fused and triangular anteriorly reaching anterolateral angles of metanotum; deltg VII with an ovate smooth knob like protrusion posterolaterally; tergite VII raised medially for the large pygophore, posterior margin concave. Spiracles II –III placed on lateral tubercles and visible from above, IV –VI sublateral but hardly recognizable from above, VII posteriorly on knoblike structure hardly visible, VIII dorsolateral on ptg VIII and visible from above.
Legs. Unarmed, femora and tibiae straight.
Genitalic structures. Pygophore wider than long with a large posteriorly sloping median ridge, its surface transversely rugose, paratergites VIII clavate directed upward with rounded apices; parameres as figs. 7–9.
Female. Generally as male but of larger size and more rounded abdomen, female’s roundly converging posteriorly, not truncate; bilobate ptg VIII shorter than truncately projecting tergites IX+X.
Measurements. Holotype: length 4.2 mm; width of abdomen across tergite III 2.05 mm, paratype 3 length 4.2mm; female: length 4.7 mm, width / length of head 17 / 17.5, w/l pronotum 26 / 10, w/l mesonotum 34 / 5, antennae 2.27 x as long as width of head, length of segments I/II/III/IV = 11.5 / 6.5 / 15 / 8; width of abdomen across tergite III 2.55 mm.
Etymology. Referring to its piceous colouration.
Distribution. So far recorded from Central Hainan on Diaoluoshan, Wuzhishan, and Jianfengling.
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