Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 97. (Budapest 2005)

Papp, L.: New species of Lygistorrhinidae (Diptera) from the Oriental Region

ANNALES HISTORICO-NATURALES MUSEI NATIONALIS HUNGARICI Volume 97 Budapest, 2005 pp. 151-161. New species of Lygistorrhinidae (Diptera) from the Oriental Region L. PAPP Department of Zoology, Hungarian Natural History Museum and Animal Ecology Research Group of the Hungarian Academy of Sciences H1088 Budapest, Baross u. 13, Hungary. E-mail: lpapp@zoo.zoo.nhmus.hu Abstract - Two new species of Matileola L. PAPP, M. similis sp. n. (Taiwan) and M. thaii sp. n., and Lygistorrhina pentafida sp. n. (Thailand), are described. Additional morphological and locality data (from Taiwan) for M. yangi L. PAPP and L. chaoi L. PAPP are given. With 21 figures. Key words - Lygistorrhinidae, Lygistorrhina, Matileola, new taxa, Oriental region INTRODUCTION Lygistorrhinidae is a small family of the Sciaroidea (Mycetophiloidea). BECHEV (2000) listed only two genera and 21 species world-wide (only two species from the Oriental region). GRIMALDI & BLAGODEROV'S (2001) corroborated the generic status of four genera and described a fifth one. My paper on Matileola from Taiwan (PAPP 2002) had already been submitted when I managed to get a copy of GRIMALDI & BLAGODEROV's (2001) paper with the description of Loyugesa from Vietnam. Although both Matileola and Loyugesa were described in comparison to Seguyola MATILE, I did not change my manuscript, since the two new forms were so characteristically different judged even by their habitus only. However, below I would like to give some information on the genitalia of the three Matileola species, as compared to those of the other genera. The structure of the male genitalia in Lygistorrhinidae is surprisingly uniform. Even such details, that tergite 9 has a basal process with "stalk" and annular apex, inner genitalia are small and hidden rather anteriorly in and between basal half of gonocoxites and tergite 9, and gonostylus almost always occurs with a medioapical tooth. There is a pair of rather long and thin medial processes of gonocoxites, which play a role in suspension of genitalia. However, I think, we may try to use also features of the male genitalia if we publish high magnification figures on