Cucullitingis biacantha, Du & Yao, 2018

Du, Sile & Yao, Yunzhi, 2018, A new genus and species of Tingidae (Heteroptera: Cimicomorpha) from Myanmar, with the analysis of the evolution of hood, carinae and paranota, Zoological Systematics 43 (3), pp. 283-293 : 284-286

Cucullitingis biacantha sp. nov. ( Fig. 1 )

Diagnosis. As for the genus.

Description. Head slightly produced in front of compound eyes; eyes fully developed, globbose; antennae foursegmented, first segment approximately the same length as second, third segment the longest and last segment fusiform; head armed with four long, thin and slender, very acute and very slightly curved, porrect spines, two frontal spines on each side of clypeus, two dorso-medial spines between eyes, located on both side of vertex; ocelli absent; bucculae areolate, narrow, tapering anteriorly, extending half-length of head; rostrum short, surpassing hind margin of head onto prosternum.

Pronotum short, wider than long, subequal to abdomen, slightly gibbose, without posterior projection; scutellum reduced but visible; collar three areolae wide, forming a hood, spheroid, cover up the posterior of head; pronotal disc with broad areolae, and only one median carina raised with one row of areolae; paranota very broad, three areolae wide, apex of the paranota forming a spine, extending anteriorly to anterior margin of eyes.

Hemelytra. Completely developed, extending far beyond abdomen beneath, hyaline, sharply widened at base, covered by large-subquadrate areolae, the largest being rather regular; clavus well developed; ScP strongly emerging from the base of forewing, costal area biseriate with additional areolae in the middle; subcostal area narrower than costal area, irregularely biseriate, with addition areolae in the middle; vein R+M fused with CuA at two thirds of the forewing; discoidal area slightly broader than subcostal area, with five-six rows of areolae, not separated into smaller groups; sutural area narrow, two-three areolae wide; stenocostal area absent; subcostal higher than discoidal areas and costal area. Hind wings not visible.

Legs. Long and slender, fore, mid, and hind legs of equal length; trochanters not fused with femora; tarsi two-segmented.

Abdomen ( Fig. 2 ). Abdominal sternites II to IX visible. Female. Paratergite VIII reduce, fused with first gonocoxipodite; posterior of paratergite VII separated, forming a subgenital plate which covers the base of ovipositor. Male. phallus not visible.

Dimensions. Body length 2.63 (♂), 2.78 (♀); maximal width of body 1.19 (♀); length of head 0.28 (♂), 0.28(♀); length of antennal segments I–IV: 0.10, 0.21, 1.21, 0.35 (♂), 0.09, 0.13, 1.34, 0.22 (♀); length of pronotum 0.54 (♂), 0.55 (♀), width 0.61 (♀); length of hemelytron 1.90 (♂), 1.93 (♀); length of clavus 0.70 (♂), 0.75 (♀); length of fore leg: femur 0.75 (♂), 0.87 (♀), tibia 0.54 (♂), 1.05 (♀), tarsomeres I–II: 0.02, 0.08 (♂), 0.02, 0.08 (♀); length of mid leg: femur 0.75(♂), 0.85 (♀), tibia 0.64 (♂), 0.96 (♀), tarsomeres I–II: 0.03, 0.09 (♂), 0.02, 0.06(♀); length of hind leg: femur 0.81 (♂), 0.69 (♀), tibia 1.10 (♀), tarsomeres I–II: 0.02, 0.07 (♀).

Material examined. Holotype ♀, Hukawng Valley , Kachin State, Northern Myanmar; lowermost Cenomanian , mid- Cretaceous, CNU-HET-MA2017001. Paratype, ♂, same data as holotype, CNU-HET-MA2017002. All deposited in CNUB .

Etymology. This species name is combinated the Latin word “ bi- ” (meaning two) and “ acanthus ” (meaning spine), referring the both side of prarnota forming a spine. The gender is feminine.

Remarks. The new genus and species exhibit a combination of characters of the Cantacaderinae , Tinginae ( Phatnomini and Tingini ). The new species shared with series of characters of Cantacaderinae : bucculae extend in front of the head; clavus fully developed; pronotum never triangularly prolonged posteriorly to obscure scutellum; posterior pronotal process absent or greatly reduced; without a cyst-like hood, just covering part of head, median cephalic spines absent. However, the new genus has the stenocostal area absent, which is typical in the Phatnomini (Tinginae) . And it also has the abdominal segments I–III fused and clypeal spines absent, which specific in the Tingini (Tinginae) . Therefore, we consider the new species should be closer to Tinginae .

Figures

Figure 1. Holotype of Cucullitingis biacantha sp. nov. A. Photograph of dorsal view. B. Photograph of labium in ventral view. C. Line drawing of dorsal view. D. Detail photograph of head. Scale bars:A, C=500μm; B, D=250μm.

Figure 2. Abdomen of Cucullitingis biacantha sp. nov. A. Photograph of holotype, CNU-HEM-MA2017001. B. Line drawing of holotype, CNU-HEM-MA2017001. C. Photograph of paratype, CNU-HEM-MA2017002. D. Line drawing of paratype, CNU-HEM- MA2017002. Scale bars=200μm.