Pelecystola peculiaris, Yang & Li, 2021

Yang, Lin-Lin & Li, Hou-Hun, 2021, First report of the genus Pelecystola Meyrick (Lepidoptera, Tineidae) in China, with description of a new species, ZooKeys 1046, pp. 189-206 : 189

Pelecystola peculiaris sp. nov. Figures 2 , 3 , 6 , 8 , 10 , 12

Type material.

Holotype: China: • ♂; Sichuan Province, Mianyang, Pingwu, Wanglang (32°54'N, 104°09'E); alt. 2569 m; 23-vii-2017; leg. Mujie Qi and Xiaofei Yang; genitalia slide No. DNAYLL18052. Paratypes: China: • 3♂, 2♀; Henan Province, Neixiang County, Baotianman (33°12'N, 111°53'E); alt. 1200 m; 23-31-v-2006; genitalia slide Nos. NKYLL022, YLL09016 • 1♂; Henan Province, Song County, Mt Baiyun (34°08'N, 112°05'E); alt. 1580 m; 24-v-2002; leg. Xinpu Wang • 1♀; Shaanxi Province, Foping County, Yuebaxiang (38°19'N, 108°00'E); 22-vii-1985; leg. Houhun Li; genitalia slide No. XYL03193 • 1♀; Shaanxi Province, Langao County, Qiancenghe (32°07'N, 108°48'E); alt. 1338 m; 10-viii-2016; leg. Weixing Feng and Wentao Shi; genitalia slide No. DNAYLL18051 • 1♀; Fujian Province, Mt Wuyi, Guadun (27°44'N, 117°38'E); alt. 1100 m; 23-v-2004; leg. Haili Yu; genitalia slide No. YLL09014 • 1♀; Hunan Province, Sangzhi (29°44'N, 110°03'E), Tianpingshan; 11-13-v-2007; leg. Liusheng Chen • 1♀, Huixiangping, Mt Fanjing (27°55'N, 108°41'E), Guizhou Province; alt. 1700 m; 1-vi-2002; leg. Xinpu Wang, genitalia slide No. XYL03192 • 1 ♀; Huguosi, Mt Fanjing, Guizhou Province; alt. 1300 m; 1-viii-2001; leg. Houhun Li and Xinpu Wang, genitalia slide No. XYL02032 • 1♀; Guizhou Province, Mt Leigong (26°22'N, 108°11'E), Xiannvtang; alt. 1535 m; 25.VII.2019; leg. Mengran Xing et al.; genitalia slide No. DNAYLL18063 • 1♀; Guizhou Province, Mt Fanjing, Jinding; alt. 1300 m; 1-vii-2001; leg. Houhun Li and Xinpu Wang; genitalia slide No. XYL02031 • 1♀; Gansu Province, Tianshui, Dangchuan (34°37'N, 105°42'E), Huamiao; alt. 1331 m; 29-vii-2006; leg. Xinpu Wang and Xiangfeng Shi; • 1♀; Sichuan Province, Yaan (30°30'N, 102°54'E), Baoxing, Fengtongzhai; alt. 1565 m; 3-viii-2016; leg. Tao Fei, genitalia slide No. DNAYLL18064.

Diagnosis.

The new species is similar to Pelecystola strigosa in its venation, forewing pattern, and paired plume-like signa in the female genitalia, but the new species can be easily distinguished from the latter by genital morphology: the subovate valva has an elongated rod-like basal process on ventral margin in the male genitalia, and the simple eighth sternite is not folded ventrad in the female genitalia. In P. strigosa , the divided valva has a pedunculate pectinifer arising from base on costal margin in the male genitalia; and the eighth sternite is strongly folded and forming a tapered plate ventral to ostium in the female genitalia.

Description.

Adult (Figs 2 , 3 ): wingspan 20.0 mm in holotype, 16.0-22.5 mm in paratype males, 19.0-26.0 mm in paratype females. Vertex and frons (Figs 2a , 3a ) creamy yellow. Antenna (Fig. 6a ) bipectinate in both sexes, ca 0.5 × length of forewing, with scape violet-black on dorsal surface, yellowish white on ventral surface, pecten rusty brown, more than 20 bristles; flagellum bipectinate, covered with narrow appressed grayish yellow scales on dorsal surface, without scales on ventral surface. Labial palpus (Fig. 6 ) 2.0 × height of head, segment ratios 1:2.5:1.1; yellow, first palpomere and base of second palpomere dark brown on outer surface; with a few dark bristles arising laterally along second palpomere; third palpomere slender, without vom Rath’s organ. Maxillary palpus (Fig. 6b ) with five palpomeres, segment ratios 2:1:1:1:0.2. Thorax and tegula blackish brown. Forewing venation (Fig. 8 ) complete, R2 and R3 stalked at one-half, R4 and R5 with a long stalk; ground color pale yellow, shining orangish yellow from lower angle of cell to anal angle; patterned with a few black patches along costal margin: a triangular basal blotch inwardly oblique from costal 1/5 to dorsal 1/7; a trapezoidal patch at middle, its posterior margin not reaching to cell; a small semicircular patch near apex; four dots between basal blotch and medial patch, another one or two spots between medial and dorsal patches; termen with obscure dots at end of veins; fringe yellow, individual scales dark-tipped. Hindwing venation complete and separated; grayish yellow, with a slight coppery sheen; fringe grayish white with a dark median band at basal 1/3. Fore and mid legs black, hind leg yellowish brown except for tarsomeres brown at dorsal base.

Male genitalia (Fig. 10 ). Tegumen gently concave on anterior margin, completely fused with vinculum into a ring. Saccus ca 2/5 length of valva, triangular, narrowly rounded at tips. Uncus lobe strongly sclerotized, long and horn-like, curved ventrad. Valva deeply divided into two lobes: cucullar lobe with a triangular base and an elongated rod-like distal part; saccular lobe subovate, rounded apically. Aedeagus slender, curved, tubular, gradually narrowed toward sharp apex, deeply channeled from apex to middle dorsally; vesica without cornutus.

Female genitalia (Fig. 12 ). Eighth tergite rectangular, posterior margin with sparse long setae, slightly concave at anterior middle; eighth sternite straight on anterior margin, gently convex and with sparse long setae on posterior margin. Anterior apophysis 0.6 × length of posterior apophysis. Ostium at center of eighth sternite, small, rounded. Antrum 2/7 length of ductus bursae (including antrum), cylindrical, triangularly concave on anterior end. Ductus bursae slightly longer than corpus bursae, slender, thin walled. Corpus bursae elongated suboval; signa consisting of pair of plume-like arms partially fused posteriorly at posterior 1/3 of corpus bursae, each arm with a strongly sclerotized, carinate stem. Inception of ductus seminalis at anterior end of antrum.

Distribution.

China (Fujian, Gansu, Guangdong, Henan, Hunan, Shaanxi, Sichuan).

Etymology.

The specific name is derived from the Latin Pelecystola peculiaris (= peculiar), referring to the special bipectinate antenna in both sexes that is peculiar in Tineidae .

DNA barcode.

Four DNA barcodes from the holotype and three female paratypes were generated and deposited in GenBank and BOLD systems: MW396737/PELE004-20 (for holotype), MT749675/PELE001-20, MW396736/PELE003-20, MW396738/PELE005-20 (for paratypes). For more details see the Suppl. material 1: Table S1.

Figures

Figures 2 - 5. Adults 2, 3 Pelecystola peculiaris sp. nov. 2 adult, holotype, male 2 a lateral view of head, paratype, male 3 adult, paratype, female 3 a dorsal view of head, paratype, female 4, 5 P. strigosa 4 adult, male 4 a dorsal view of head, male 4 b lateral view of head, male 5 adult, female. Scale bars: 5.0 mm (adults); 1.0 mm (heads).

Figures 6, 7. Head 6 Pelecystola peculiaris sp. nov. 6 a flagellum 6 b Maxillary palpus, paratype, male, slide No. YLL 20001 7 P. strigosa 7 a flagellum 7 b maxillary palpus, male, slide No. YLL 18066. Scale bars: 0.5 mm (6, 7), 0.1 mm (6 a, 6 b, 7 a, 7 b).

Figures 8, 9. Venation 8 Pelecystola peculiaris sp. nov., paratype, male, slide No. NKYLL 022 9 P. strigosa, male, slide No. YLL 18066. Scale bars: 2.0 mm.

Figures 10, 11. Male genitalia 10 Pelecystola peculiaris sp. nov., holotype, slide No. DNAYLL 18052 11 P. strigosa, slide No. YLL 18067. Scale bars: 0.5 mm.

Figures 12, 13. Female genitalia 12 Pelecystola peculiaris sp. nov., paratype, slide No. DNAYLL 18063 13 P. strigosa, slide No. DNAYLL 18054 Scale bars: 0.5 mm.