Issikiomartyria catapasta, Imada, Yume & Kato, Makoto, 2018

Imada, Yume & Kato, Makoto, 2018, Descriptions of new species of Issikiomartyria (Lepidoptera, Micropterigidae) and a new genus Melinopteryx gen. n. with two new species from Japan, Zoosystematics and Evolution 94 (2), pp. 1-25 : 11-13

Issikiomartyria catapasta sp. n. Figs 1e, 12, 13

Material examined.

Holotype: JAPAN [HONSHU] 1♂ collected by YI on 21.VI.2015 at Tachimata-keikoku (620 m), Kitaakita-shi, Akita Pref (Fig. 19:6), NMNS.

Paratypes: JAPAN [HONSHU] 1♀ collected by YI on 13.VI.2016 at same locality as holotype (Fig. 19:6), NMNS.

Additional materials: JAPAN [HONSHU] 3♂ collected by YI on 21.VI.2015 at same locality as holotype, KUHE; 3♂ 1♀ collected by YI on 13.VI.2016 at same locality, KUHE; 1♂ collected by YI on 14.VI.2016 at Mt. Moriyoshi (380 m), Kitaakita-shi, Akita Pref (Fig. 19:7), KUHE.

Type locality.

Japan, Akita Pref: Tachimata-keikoku (Honshu).

Diagnosis.

Middle portion of tergum X in male undeveloped, approximately half of lateral portions. Female genital chamber with numerous sclerites at proximo-dorsally.

Description.

Head dark brown, naked and glossy on both sides, sparsely covered with yellow piliform scales with dark yellow scales on vertex. Antenna longer than forewing in male, with 60 flagellomeres in female (n=1). Labial palp 1-segmented. Forewing length 4.3 mm (4.1-4.6, n=9) in male.

Male abdomen and genitalia (Fig. 12). Mid-dorsal length of segment IX ring about 1/4 of ventral length. Valva with elongated apex; with a very small proximo-ventral ridge. Aedeagus with two pairs of dorsal ridges: a pair of shorter distal fins and a pair of longer proximal fins extending vertically; with a pair of lateral triangular fins extending upwards. Tergum X with squarish medial part, with a pair of triangular lobes disto-dorsally.

Female abdomen and genitalia (Fig. 13). Segment IX forming a complete ring, strongly sclerotized; with a pair of dorso-lateral protrusions near base. Segment X consisting of a pair of lateral sclerites and a dorsal sclerotized plate; dorsal sclerite longer than width, projected upward at caudal end. Corpus bursae large, globular, membranous, with long narrow neck region anteriorly; with signa composed of four saggitate sclerites near proximal end. Ductus spermathecae arising from a round concavity. Genital chamber with numerous tiny sclerites dorsally and a large, fan-shaped sclerite ventrally.

Remarks.

Issikiomartyria catapasta sp. n. is most similar to I. trochos sp. n. in that lateral parts of tergum X extending dorsally, but can be distinguished by the following traits: two basal pairs of dorsal and lateral aedeagal fins closer to each other; numerous tiny sclerites scattered dorsally in female genital chamber; corpus bursae without tiny sclerites.

Etymology.

The specific name is a noun in the genitive singular derived from a Latin word, “catapastus” (patchwork), referring to the numerous tiny sclerites in the female genital chamber of this species (Fig. 13).

Distribution.

This species has only been found from Kitaakita-shi (Honshu: Akita Pref).

Bionomics.

Larvae feed on the thalli of Conocephalum conicum . The localities are forest paths along mountain streams of cool-temperate forests at 380-620 m, where Fagus crenata Blume ( Fagaceae ), Pterocarya rhoifolia Sieb. Et Zucc. ( Junglandaceae ) and Aesculus turbinate Blume ( Sapindaceae ) predominately occur.