Parena (Parena) amamiooshimensis Habu, 1964

Shi, Hongliang & Liang, Hongbin, 2023, Taxonomic revision of the genus Parena Motschulsky, 1860 (Coleoptera, Carabidae, Lebiini, Metallicina), Zootaxa 5286 (1), pp. 1-144 : 103

[29] Parena (Parena) amamiooshimensis Habu, 1964

Habitus: Fig. 59C . Male genitalia: Fig. 61 .

Habu, 1964a: 29 (type locality: Amami-oshima Is., Hatsuno, holotype in NIAES: National Institute for Agro-Environmental Sciences, Japan); Habu, 1967: 156; Habu, 1982: 113.

Type material examined. Parena amamiooshimensis Habu : Paratype: 1 male (NHML), "Paratype" [round label with yellow circle], " Amamiôshi- / ma Is., Kago- / shima Pref. / Japan ", "Paratype / Parena / amamiooshi- mensis Habu " [green label] < Figs 59C , 61 >.

Comparisons. This species is very similar to P. nigrolineata , but its stout male genitalia shows they are distinct. Externally, P. amamiooshimensis differs from P. nigrolineata mainly in having the elytra black stripes obliterated from the apices and background color darker. According to Habu (1967), these differences are valid when determining Japanese species. However, we examined one specimen of P. nigrolineata from Guizhou, China ( Fig. 56E ) having elytral stripes similar to P. amamiooshimensis , and two specimens of P. nigrolineata from Yunnan having dark reddish brown background similar to P. amamiooshimensis . Thus, distributional information is sometimes necessary when identifying this species.

Description. Body length 8.0– 9.3 mm. Dorsum dark reddish brown, elytra with black lateral stripes, without metallic hue, stripes completely or partly obliterated from intervals 1 to 4 basally and apically; antennae, mouthparts, legs and venter brown. Postgenae without suborbital setae; antennae hardly reaching pronotal base; mentum with a pair of very short median setae. Pronotum rounded-hexagon, PW/PL = 1.43–1.49, slightly wider than head, PW/HW = 1.04–1.08; widest at anterior third, strongly narrowed to base, lightly sinuate before posterior angles; posterior angles widely obtuse. Elytra slightly dilated to apex, surface with very faint isodiametric microsculpture; striae well incised, with fine puncture rows; intervals sparsely punctate; disc with large and shallow depressions near basal third of intervals 3 to 6. Apex of abdominal sternite VII weakly emarginate in males. Median lobe of aedeagus stout, right margin sinuate before apical lamella; apical lamella wide rounded-triangular, LL smaller than LW, apex weakly bent upward in lateral view. Females not studied, but according to Habu (1967) gonocoxite II of ovipositor similar to P. nigrolineata .

Distribution ( Map 10 , cyan). Only known from the Ryukyu Islands, including Takera Is., Amami Is., Okinawa Is., Tokuno Is. and Ishigaki Is. (Habu, 1967, 1982). It is sympatric with P. nigrolineata .

Remarks. P. amamiooshimensis is a species with the stoutest male genitalia within the P. nigrolineata group, which is somewhat similar to the P. latecincta group. However, the male genitalia of P. amamiooshimensis is different from that of P. latecincta group in the apical lamella (in lateral view) thin and apex slightly bent dorsally. This character well corresponds to other species in the P. nigrolineata group.

Figures

MAP 10. Distributions for species in the Parena (Parena) nigrolineata group.

FIGURE 56. Habitus of Parena (Parena) nigrolineata (Chaudoir). A Lectotype of Parena nigrolineata (Chaudoir). B Holotype of Parena schillhammeri Kirschenhofer [= Parena nigrolineata (Chaudoir)]. C Paralecotype of Crossoglossa latecincta Bates, original misidentification of Parena nigrolineata (Chaudoir). D Male from Shanghai (without lateral strips). E Female from Guizhou (with reduced lateral strips). F Male from Taiwan. Scale bars = 2 mm.

FIGURE 59. Habitus of Parena (Parena) picea (MacLeay) and Parena (Parena) amamiooshimensis Habu. A P. picea (MacLeay), male from New South Wales. B P. picea (MacLeay), female from Queensland. C Paratype of Parena amamiooshimensis Habu. Scale bars = 2 mm.

FIGURE 61. Median lobe of male genitalia for Parena (Parena) amamiooshimensis Habu, right-lateral (r), ventral (v), leftlateral (l), and dorsal (d) views, paratype. Scale bar = 0.5 mm.