Palumbina pylartis ( Meyrick, 1908 )

Ga-Eun Lee 1, Houhun Li, Taeman Han & Haechul Park, 2018, A taxonomic review of the genus Palumbina Rondani, 1876 (Lepidoptera, Gelechiidae, Thiotrichinae) from China, with descriptions of twelve new species, Zootaxa 4414 (1), pp. 1-73 : 23-25

publication ID	https://doi.org/ 10.11646/zootaxa.4414.1.1
publication LSID	lsid:zoobank.org:pub:771BDF83-45B3-4A80-9D10-030DC61BF15C
DOI	https://doi.org/10.5281/zenodo.6486302
persistent identifier	https://treatment.plazi.org/id/03ED87ED-B406-FFCF-1ED9-5F1EFE267A81
treatment provided by	Plazi
scientific name	Palumbina pylartis ( Meyrick, 1908 )
status

Treatment

Palumbina pylartis ( Meyrick, 1908) View in CoL

( Figs 2 View FIGURES 1, 2 , 24 View FIGURES24 , 41 View FIGURES 40-46 , 59 View FIGURES 58-64 , 78 View FIGURES 73-80 , 99 View FIGURES94-99 , 118 View FIGURES 118-121 )

Thiotricha pylartis Meyrick, 1908: 441 View in CoL . TL: Assam, India. TD: NHMUK. Thyrsostoma pylartis: Meyrick, 1925: 100 ; Gaede, 1937: 301; Kuroko, 1957: 7; Clarke, 1969: 487; Kanazawa & Heppner, 1992: 70.

Palumbina pylartis: Sattler, 1982: 25 View in CoL ; Sakamaki, 2013: 298.

Palumbina pylatis: Hua, 2005: 7 . Misspelling.

Material examined. CHINA: Hainan Province: 1 ♀, Tianchi, Jianfengling, 12.vi.20 10, leg. Bingbing Hu and Jing Zhang, genitalia slide no. LGE16056, DNA voucher no. LGE-G007 ; 1 ♂, Jianfengling Nature Reserves (18.74°N, 108.84°E), 1050 m, Ledong County, 2 7.iv.2014, leg. Tengteng Liu, Wei Guan and Xuemei Hu, genitalia slide no. LGE16316 GoogleMaps ; Yunnan Province: 1 ♂, Yexianggu (22.17°N, 100.87°E), 762 m, Xishuangbanna, 20.vii. 201 4, leg. Kaijian Teng, Wei Guan, Xiuchun Wang and Shurong Liu, genitalia slide no. LGE16315, DNA voucher no. LGE-G456 GoogleMaps ; 1 ♀, Yexianggu (22.17°N, 100.87°E), 762 m, Xishuangbanna, 1 3.vii.2015, leg. Kaijian Teng and Xia Bai, genitalia slide no. LGE16191, DNA voucher no. LGE-G034.

Re-description. Adult ( Figs 24 View FIGURES24 , 78). Wingspan 8.5̄10.0 mm. Head silvery white. Labial palpus silvery white, segment I fuscous on outer surface, segment II fuscous dorso-distally, hair pencil reaching distal end of II in male; segment III grey to fuscous, slender, as long as II, pointed at apex. Antenna with scape white; flagellum with dorsal half white, remaining flagellum black; male with cilia slightly longer than width. Thorax silvery white, fuscous post-medially. Tegula silvery white, posterior margin sometimes suffused with grey. Forewing with hair pencil reaching basal 2/ 3 in male; ground color silvery white to yellowish white; markings fuscous: basal fascia faint; Vshaped basal marking at 1/5, confluent with basal fascia on costa, its posterior end reaching fold and confluent with antemedian fascia; antemedian fascia slender, zigzagged, interrupted by silvery white scales below fold; median fascia twice width of antemedian fascia, with posterior end sometimes not reaching dorsum; distal fascia broad, from between 2/3 and 5/6 of costal margin slightly narrowed downwards, confluent with median fascia on costa, with inner margin sharply extending medially toward base and reaching median fascia by a longitudinal line, posterior end sometimes not reaching dorsum; subapical spot present. Hindwing dark grey. Legs silvery white; fore femur, tibia and tarsus black on outer surface, fore tibia with inner surface black apically, fore tarsus with inner surface black at middle of first tarsomere, remaining tarsomeres ringed with black apically; mid tibia black apically, mid tarsus with first tarsomere black at middle, remaining tarsomeres ringed with black apically; hind femur black at base, hind tibia suffused with black at 1/3, 2/3 and apex on outer surface, broadly suffused with black on inner surface, hind tarsus as in mid tarsus.

Pregenital abdomen (Fig. 41). In male, coremata situated interiorly, 1/3 to 1/4 length of abdomen; sternum VIII sub-rectangular, emarginate medially on posterior margin; tergum VIII with sclerotized edge. Female segment VII concave medially inV-shape on posterior margin.

Male genitalia (Figs 59, 99). Uncus spatulate, with a medial groove ventrally. Culcitula present. Gnathos hook slender and upcurved, pointed at apex. Tegumen three times longer than uncus, medial process thicker than gnathos hook, curved upward, serrate ventrally; behind process set with tubercles bilaterally, each tubercle rounded, bearing a long hair (Fig. 59). Valva moderately long, slightly curved inward, covered with hairs distally, widened before apex, blunt at apex. Anellus lobe 1/3 length of valva, bulged at base, distal 1/3 curved inward, blunt at apex; subapical bristle hooked, 1/3 length of anellus lobe. Vinculum broad, posterior margin nearly straight. Saccus slender, as long as anellus lobe. Juxta with a digitate lateral process at each side, curved inward. Aedeagus with basal 1/3 dilated, distal 3/4 slender and straight, blunt at apex.

Female genitalia ( Fig. 118 View FIGURES 118 ). Papillae anales simple. Apophyses anteriores about 1/4 length of apophyses posteriores. Tergum VIII divided into two sclerites, inner margins remote anteriorly and close posteriorly. Sternum VIII with posterior margin broadly concave, anterior margin wrinkled and strongly projected in V-shape. Ostium bursae small, near anterior margin of sternum VIII. Ductus bursae narrow; ductus seminalis arising from posterior 1/3. Corpus bursae oval; signum at posterior 1/3, rounded, bulged inward, formed by dense minute denticles.

Host plant. Fagaceae : Quercus myrsinaefolia Blume.

Diagnosis. Palumbina pylartis resembles P. sineloba sp. nov., P. spinevalva sp. nov., P. acerosa sp. nov. and P. triangularis sp. nov., but it can be separated from them by the broad distal fascia on the forewing with inner margin produced medially in a longitudinal line that often reaches the median fascia, while those of other species do not reach the median fascia. The general coloration of P. pylartis is less glossy than that in P. sineloba sp. nov., P. spinevalva sp. nov. and P. acerosa sp. nov., and is slightly tinged with yellow as in P. triangularis sp. nov.

The male genitalia are similar to those of P. acerosa sp. nov. and P. triangularis sp. nov. in the tegumen having a well-developed medial process and the juxta with a lateral process at each side. However, the medial process of tegumen is broadened apically in P. pylartis , while those of other species are slender apically. The process of juxta is digitate in P. pylartis sp. nov., but those are sub-triangular and triangular in P. acerosa sp. nov. and P.

triangularis sp. nov., respectively. The tegumen of P. pylartis is ventrally set with tubercles as in P. sineloba sp. nov., P. spinevalva sp. nov., P. acerosa sp. nov. and P. triangularis sp. nov., but they are less abundant (Fig. 59) as compared to other species (Figs 60, 61, 62, 63). In female, the sternum VIII of female genitalia is strongly elongate anteriorly similar to P. acerosa sp. nov., but P. pylartis can be distinguished from the species by the absence of a transverse linear sclerite on intersegmental membrane. Also, the sternum VIII of P. pylartis is wrinkled anteriorly and the divided sclerites of tergum VIII are remote anteriorly while those of P. acerosa sp. nov. are remote posteriorly. The signum is rounded with dense minute denticles as in P. acerosa sp. nov., P. acuticula sp. nov., P. operaria and P. rugosa sp. nov.

Distribution. China (Hainan, Taiwan, Yunnan), Japan, India.

Remarks. Palumbina pylartis was described on the basis of 30 specimens. Clarke (1969) designated a lectotype and gave illustration of the male genitalia, and stated that only 12 specimens remained in the Meyrick’s collection. In Japan, the larvae are known as a leaf-miner feeding on Quercus myrsinaefolia Blume (Fagaceae) ( Kuroko 1957; Sattler 1982; Sakamaki 2013). The species overwinters as adults and flies almost all through the year ( Sakamaki 2013).