Meleonoma Meyrick, 1914

Wang, Shuxia, Zhu, Xiaoju, Zhao, Baixue & Yang, Xiaofei, 2020, Taxonomic review of the genus Meleonoma Meyrick (Lepidoptera: Autostichidae), with a checklist of all the described species, Zootaxa 4763 (3), pp. 371-393 : 374-376

Meleonoma Meyrick, 1914

Meleonoma Meyrick, 1914: 255 .

Type species: Cryptolechia stomota, Meyrick, 1910 . TL. India. TD. NHMUK.

Acryptolechia Lvovsky, 2010: 255 .

Type species: Cryptolechia malacobyrsa Meyrick, 1921 . TL: Japan. TD: NHMUK.

Generic characters. Head ( Figs 3 a−h): Vertex with scales spreading from lateral margin toward middle; labial palpus three segmented, upturned, third segment shorter than second segment, acute at apex; antenna filiform, shorter than forewing, scape slightly elongate and widened, without pecten.

Thorax ( Figs 6 a−h). Forewing from narrow to broad lanceolate, with long oblique termen; hindwing lanceolate or elongate sub-oval. Venations ( Fig. 4 ): Forewing with R 4 and R 5 stalked, R 5 to apex, M 3, CuA 1 and CuA 2 separated; hindwing with Rs, M 1 and M 2 subparallel, M 3 and CuA 1 stalked from lower angle of cell.

Abdomen ( Figs 5 a−h): Tergites with strong spines, arranged in different shape.

Male genitalia ( Figs 7 a−h): Uncus varied in length and shape, smooth or densely setose. Gnathos absent or present; if present, being a circle (in some species with a ventral plate), or either separated, or indistinct ventrally. Valva varied in shape, usually widened medially, or widened from base to apex; transtilla developed or absent; sacculus free from valva entirely or distally, seldom not separated from valva. Phallus often with sclerites or clustered spines.

Female genitalia ( Figs 8 a−h): Papillae anales broad. Lamella postvaginalis and lamella antevaginalis present or absent. Antrum present or absent. Ductus bursae membranous, partly or entirely sclerotized. Corpus bursae with or without granules; signum present or absent.

Diagnosis. The genus Meleonoma Meyrick, 1914 is close to the genus Phaulolechia Diakonoff, 1951 . Meleonoma can be distinguished by the forewing with termen not concave below apex, R 5 extended to costa, and CuA 1 and CuA 2 separated; in Phaulolechia , the termen of the broad forewing is concave below apex, R 5 is extended to termen, and CuA 1 and CuA 2 initiate from the same point ( Diakonoff 1951: 89).

Distribution. The genus Meleonoma is distributed mostly in the Palearctic and the Oriental regions.

Key to species groups of Meleonoma Meyrick, 1914

1. Forewing with a transverse fascia........................................................................ 2

- Forewing without a transverse fascia...................................................................... 4

2. Forewing ground color dark, with a yellow median fascia..................................................... 3

- Forewing ground color yellow, with a dark postmedian fascia.................................... malacobyrsa group

3. Valva without an apical spine................................................................ fasciptera group

- Valva with an apical spine........................................................... dentivalvata group (part)

4. Forewing ground color yellow, with a dark costal spot and a distal patch................................ facialis group

- Forewing ground color dark, with yellow markings, or without markings......................................... 5

5. Forewing without markings.............................................................. jigongshanica group

- Forewing with yellow markings.......................................................................... 6

6. Gnathos present...................................................................................... 7

- Gnathos absent....................................................................................... 8

7. Forewing with two small costal and one small dorsal spots; uncus furcate apically................... annulignatha group

- Forewing with two lager costal and one large dorsal spots or with more irregular spots; uncus not furcate apically............................................................................................... segregnatha group

8. Forewing with two large costal spots or with a median fascia and a costal spot; uncus short and strong, densely setose...................................................................................... dentivalvata group (part)

- Forewing usually with two small costal spots; uncus long and slender, with a few setae................. acutiuscula group

Figures

FIGURE 3. Heads of Meleonoma spp. a. M. malacobyrsa (Meyrick, 1921) b. M. sp. (Mt. Longtang) c. M. sp. (Mt. Daming) d. M. sp. (Mt. Weibao) e. M. jigongshanica (Wang, 2003) f. M. paranthaedeaga (Wang, 2003) g. M. facialis Li et Wang, 2002 h. M. acutiuscula (Wang, 2004).

FIGURE 4. Wing venation of M. malacobyrsa (Meyrick, 1921)

FIGURE 5. Abdmens of Meleonoma spp. a. M. malacobyrsa (Meyrick, 1921), slide No. ZXJ19149♂ b. M. sp. (Mt. Longtang), slide No. ZXJ19136♂ c. M. sp. (Mt. Daming), slide No. ZXJ19134♂ d. M. sp. (Mt. Weibao), slide No. YAH15265♂ e. M. jigongshanica (Wang, 2003), slide No. ZXJ19161♀ f. M. paranthaedeaga (Wang, 2003), slide No. ZXJ19140♂ g. M. facialis Li et Wang, 2002, slide No. ZXJ19154♂ h. M. acutiuscula (Wang, 2004), slide No. ZXJ19170♂. Scale bars: 0.5 mm

FIGURE 6. Adults of Meleonoma spp. a. M. malacobyrsa (Meyrick, 1921) b. M. sp. (Mt. Longtang) c. M. sp. (Mt. Daming) d. M. sp. (Mt. Weibao) e. M. jigongshanica (Wang, 2003) f. M. paranthaedeaga (Wang, 2003) g. M. facialis Li et Wang, 2002 h. M. acutiuscula (Wang, 2004). Scale bars: 2 mm

FIGURE 7. Male genitalia of Meleonoma spp. a. M. malacobyrsa (Meyrick, 1921), slide No. ZXJ19149 b. M. sp. (Mt. Longtang), slide No. ZXJ19136 c. M. sp. (Mt. Daming), slide No. ZXJ19134 d. M. sp. (Mt. Weibao), slide No. YAH15265 e. M. jigongshanica (Wang, 2003), slide No. L97210 f. M. paranthaedeaga (Wang, 2003), slide No. ZXJ19140 g. M. facialis Li et Wang, 2002, slide No. ZXJ19154 h. M. acutiuscula (Wang, 2004), slide No. ZXJ19170. Scale bars: 0.2 mm (b, g); 0.5 mm (a, c, d, e, f, h)

FIGURE 8. Female genitalia of Meleonoma spp. a. M. malacobyrsa (Meyrick, 1921), slide No. LiSR15015 b. M. sp. (Mt. Longtang), slide No. ZXJ19163 c. M. sp. (Mt. Daming), slide No. YAH12313 d. M. sp. (Mt. Weibao), slide No. ZXJ19169 e. M. jigongshanica (Wang, 2003), slide No. ZXJ19161 f. M. paranthaedeaga (Wang, 2003), slide No. W98003 g. M. facialis Li et Wang, 2002, slide No. ZXJ19284 h. M. acutiuscula (Wang, 2004), slide No. ZXJ19167. Scale bars: 0.2 mm