Cecyrina flata, Zhao, Qing, Bu, Wen-Jun & Liu, Guo-Qing, 2016

Zhao, Qing, Bu, Wen-Jun & Liu, Guo-Qing, 2016, The genus Cecyrina Walker, 1867, with the description of two new species (Hemiptera: Pentatomidae: Asopinae), Zootaxa 4114 (3), pp. 309-319 : 312-314

Cecyrina flata sp. nov. (Figs. 3, 4, 9–13)

Type specimens. Holotype: male, CHINA: Meng’a (22°00′ N, 100°47′ E), Xishuangbanna, Yunnan Province, alt. 50–1080m, 13. V. 1958, Shu-Yong Wang leg. Deposited in Institute of Zoology, Chinese Academy of Sciences.

Diagnosis. Very similar to C. platyrhinoides , but can be identified by the black-brown body coloration, the pronotum comparatively flat, the five yellowish stripes on the dorsal surface, the reddish legs with black-brown coxae ( Fig. 3 ). The pygophore of this new species is as long as broad, the rim of the pygophoral plates is smooth, and the posterolateral angles are long and angulated, situated much higher than the notch in the ventroposterior rim, the apices are much more transparent than in C. platyrhinoides , and the shape of parameres are also very different, the apical part of the C. flata extended laterally, one side obtuse, the other side comparatively acute ( Fig. 13 ); while the apical part of C. platyrhinoides extended only one side ( Fig. 18 ).

Description. Male. Body elongate oval, black-brown, with shallow punctures. Dorsal surface mottled with many irregular yellowish spots ( Figs. 3, 4 ).

Head. Longer than width, shallowly punctured; dorsal surface yellow-brown, ventral surface reddish brown; vertex blackish, with a wide yellowish stripe medially; mandibular plates reddish-brown, with black shallow punctures, about one third longer than clypeus, converging in front of and meeting anterior to clypeus; anteocular lateral margins subparallel. Antenna reddish-brown except base of segment III, basal one fourth of segment IV, and basal one sixth of segment V pale yellow; segment I very short, cylindrical, reaching about one third of postocular portion of head. Rostrum reddish-brown, reaching mesocoxae; bucculae brown.

Thorax. Pronotum width about 1.5 times as length, dorsal surface shallowly punctured, with a longitudinal ridge medially, extending to apex of scutellum; anterior margin concave; anterior angles angulated, short, acute, oriented laterally; anterolateral pronotal margins sinuated; humeral angles rounded, weakly produced, seldom surpassing base of wing; posterior angles sharply angulated; calli brown, yellowish in middle of each. Scutellum brownish, dorsal surface very rugulose, apex tongue-shaped; each basal angle with small pit (fovea), beside which is a small yellowish spot. Corium not shiny, shallowly punctured, surface noticeably less rugulose than pronotum or scutellum, mingled with irregular dark brown spots; membrane infuscate, extending beyond apex of abdomen, each lateral margin with large lucid spot and a few indistinct spots between the two lucid spots. Metathoracic scent gland ostiole associated with an elongate, ear-shaped peritreme, each with a yellowish stripe, external apex obtuse, internal apex acute; evaporative area distinct, grey-brown, surrounding scent gland peritreme, each occupying half of metapleuron. Legs reddish-brown, profemur reddish-brown, with shallow brown punctures, each with a subapical spine; dilation of protibia blade-shape, width about one fourth length of protibia, punctured, with long brown hairs, the tibial surface opposite the dilation with distinct acute spine, and long golden hairs; meso- and metatibia yellowish medially. Tarsi 3-segmented, with long reddish-brown hairs; segment I longest, red-brown, with a yellowish subapical band; segment II shortest, about one fourth length of segment I, yellowish; segment III shorter than segment I, yellowish basally, reddish-brown apically; tarsal claws reddish-brown except yellowish basally.

Abdomen. Oval, brown, with many small irregular yellowish spots and shallow punctures; base of sternum III (second visible) with distinct anteriorly-directed, brown tubercle, the apex not reaching metacoxae. Angles of connexival segments III–VII acute, produced more distinctly than in other species; without sternal glandular patches.

Male genitalia. Pygophore black-brown, cup-like, posterolateral angles long, angulated, situated much higher than notch in ventroposterior rim, apex transparent; dorsoposterior rim sinuated, with small subrectangular parandria; ventroposterior rim concave, sclerotized ( Figs. 9, 10 ). Aedeagus simple, with one pair of lateral conjunctival lobes which are long and narrow, their apices not bifurcate; ventral and apical conjunctival lobes absent; median penial plates strongly sclerotized, united at base; vesica slightly stretched out from venter of median penial plates ( Figs. 11, 12 ). Apical part of paramere extended laterally, one side obtuse, the other side comparatively acute ( Fig. 13 ).

Female. Unknown.

Distribution. China (Yunnan).

Etymology. The specific name refers to the less rugulose, flatter body.

Figures

FIGURES 3 – 8. Habitus photographs of Cecyrina spp. 3, 4. C. flata sp. n.; 5, 6. C. platyrhinoides; 7, 8. C. rubra sp. n.; (3, 5, 7. Dorsal view; 4, 6, 8. Ventral view). Bar = 5 mm.

FIGURES 9 – 13. Cecyrina flata sp. n. 9 – 10. Pygophore (9. Dorsal view; 10. Ventral view) (dp. r. = dorsoposterior rim; lp. a. = lateroposterior angle; pa. = parandria vp. r. = ventroposterior rim). 11 – 12. Aedeagus (11. Lateral view; 12. Apical view) (bl. c. l. = basolateral conjunctival lobe; m. p. p. = median penial plates; v. = vesica). 13. Paramere (Ventral view).

FIGURES 14 – 19. Cecyrina platyrhinoides 14 – 15. Pygophore (14. Dorsal view; 15. Ventral view) 16 – 17. Aedeagus (16. Lateral view; 17. Apical view) 18. Paramere (Ventral view) 19. Female external genitalia (1 st g. = first gonocoxite; 8 th p. = eighth paratergite; 9 th p. = ninth paratergite).