INTRODUCTION

The Lepidostomatidae and Odontoceridae are relatively small families of caddisflies containing about 250 and 70 species, respectively, in the world. The larvae construct portable cases with various substrate materials. Although they occur abundantly in diverse freshwater habitats, their larval and adult relations have not been well known.

Up to date, Dinarthrodes japonicus (Tsuda) (Lepidostomatidae) and Psilotreta kisoensis Iwata (Odontoceridae) were the only species whose larval stages were associated with the adult stages among ten species of Lepidostomatidae (Yamada, 1938;Kobayashi, 1989;Park and Bae, 1998a, b) and four species of Odontoceridae (Tsuda, 1942;Yoon and Kim, 1988;Park and Bae, 1998b) recorded from Korea.

The purpose of this study is to describe newly discovered larval and adult stages of the species in the families from Korea.

MATERIALS AND METHODS

Adult and larval materials of Lepidostomatidae and Odontoceridae including some reared materials, collected from South Korea since 1983 and deposited at Seoul Women’s University were used for this study. All the materials were preserved in 80% ethyl alcohol. Diagnoses were provided with line-drawings of key characters. The abbreviations used in taxonomic account are as follows: M (male adult), F (female adult), and L (larva); CB (Chungcheongbug-do), GB (Gyeongsangbug- do), GG (Gyeonggi-do), GN (Gyeongsangnam- do), GW (Gangweon-do), HB (Hamgyeongbug- do), HH (Hwanghae-do), HN (Hamgyeongnam- do), JB (Jeonrabug-do), JN (Jeonranam- do), PB(Pyeonganbug-do), and PN (Pyeongannam- do); Mt.(Mountain) and Tp. (Temple).

TAXONOMIC ACCOUNT

Family Lepidostomatidae Ulmer 네모집날도래科

Genus Goerodes Ulmer 네모집날도래屬

Goerodes elongatus (Martynov) 흰점네모집날도래 (신칭)

Diagnosis. Larva. Body color is light yellow. Dorsal head and thorax possess many granules (Fig. 1). Metanotal sclerite is posteriorly round with posteromedian constriction (Fig. 1). Setae (black dots on dorsal head and thorax) are positioned as in Fig. 1.

Material examined. 1F with larval exuvium (reared from pupa in lab); GG, Gapyeong, Seungcheonsa (Tp.), 1999 V 12 (emerged 1999 V 29).

Remarks. The larva of this species is described for the first time from the reared larval exuvium.

Goerodes sinuatus (Martynov) 굽은네모집날도래 (신칭)

Diagnosis. Male adult. Mesal process of abdominal segment X in male is poorly developed (Fig. 3); a pair of lateral processes of abdominal segment X are curved upward (Fig. 4). Inferior appendages of abdominal segment IX are not pointed and possess a basoventral process (Fig. 5). Larva. Dorsal head and thorax of G. sinuatus (Fig. 2) possess less granules than those of G. elongatus Martynov. Two pairs of gills are present posterolaterally in the abdominal segment II-VII.

Material examined. 1M: GG, Taehwasan (Mt.), 1996 VIII 19 (collected by Y. Nagayasu and determinated by T. Ito, 1996); 2L: GG, Yongin, Korean Fork Village, 1996 VIII 19.

Remarks. According to Ito et al. (1992), subventral pair of posterolateral gills in the abdominal segment VII are absent in about a half of the larval specimens examined. The larval stage of this species is reported for the first time from Korea.

Family Odontoceridae Wallengren 바수염날도래科

Genus Psilotreta Banks 바수염날도래屬

Psilotreta falcula Botosaneanu 멧바수염날도래 (신칭)

Psilotreta falculaBotosaneanu, 1970: 314 (M, F; HB, HN, PB); Kumanski, 1991: 28 (M, F; GW).

Diagnosis. Male adult. Male adults of P. falcula are similar to those of P. locumtenens but can be distinguished by the characters of genitalia: parameres are short and apically hooked downward (Fig. 11); basal part of each inferior appendage possesses a prominent apicoventral projection (Figs 7, 10); intermediate appendages are long and strongly curved (Figs 6, 7). Female adult. Vaginal sclerites of this species are as in Botosaneanu (1970). Setal wart of tergum X are projected posteriorly; tergum IX lacks convex part (Fig. 14); abdominal segment IX possesses distinct markings (Fig. 15).

Material examined. 3M: CB, Jecheon, Weoragsan (Mt.), 1987 V 30; 12M: GG, Soyosan (Mt.), 1984 V 22; 47M: GG, Pocheon, Wangbangsan (Mt.), 1985 V 29; 1M: GG, Baegunsan (Mt.), 1986 V 17; 2M: GG, Pocheon, Hahyeon-ri, 1986 V 26; 1M: GG, Baegcheongyegog (St.), 1986 VII 24; 3M: GW, Samcheog, Dutasan (Mt.), Mureunggye, 1985 V 26; 19M: GW, Chiagsan (Mt.), Guryongsagyegog (St.), Daegog camping area, 1999 V 27- 28; 6M: JB, Jeongeub, Naejangsan (Mt.), 1985 V 5; 29M: JB, Namwon, Sannae-myeon, Jirisan (Mt.), Dalgung, 1986 IV 23; 1M: JB, Jeongeub, Naejangsan, 1994 VI 3; 1M: JB, Jirisan, Ssanggyesageygog (St.), 1995 VI 25; 1M: JN, Suncheon, Jogyesan (Mt.), 1988 V 23.

Psilotreta locumtenens Botosaneanu 수염치레날도래 (신칭)

Diagnosis. Male adult. Male adults of P. locumtenens are similar to those of P. falcula but can be distinguished by the characters of genitalia: parameres are long and weakly curved (Fig. 13); basal part of each inferior appendage lacks a prominent apicoventral projection (Figs 9, 12); intermediate appendages are shorter than those of P. falcula (Figs 8, 9). Female adult. Abdominal tergum IX possesses a convex part (Fig. 16); abdominal segment IX possesses distinct markings in ventral view (Fig. 17). Setal wart of tergum X is projected posteriorly. Vaginal sclerites are as in Botosaneanu (1970). Larva. The larva of P. locumtenens possesses distinct markings on dorsal head and thorax as in Lepneva (1966) and Yoon and Kim (1988).

Material examined. 35M: GG, Baegunsan, 1986 V 17; 1M with larval exuvium (reared from pupa in lab): GG, Gapyeong, Seungcheonsa, 1999 IV 23 (emerged 1999 V 5); 22M, 10F with larval exuviae (reared from pupae in lab): GG, Gapyeong, Seungcheonsa, 1999 V 12 (emerged 1999 V 12-24); 58M: GW, Chiagsan, Bugog-ri, Taejongdae 50m upstream, 1999 V 28-29 (at light); 9M: JB, Jinangun, Deogyusan (Mt.), 1983 V 20; 3M: JB, Namweon, Jirisan, Dalgung, 1986 VI 23, VI 25; 1996 V 18.

Remarks. The taxonomy of the larvae of Psilotreta has been historically confused. Lepneva (1966) described the larvae of P. kisoensis from Russia, but Botosaneanu (1970) and Parker and Wiggins (1987) indicated that they are actually P. locumtenens or P. falcula. As a result of close examinations of reared materials from Korea, we found that the larvae of Psilotreta previously known as P. kisoensis are actually P. locumtenens.