Seven New Species Of Phanoperla Banks From Vietnam And Thailand (Plecoptera: Perlidae) Author Sivec, Ignac Slovenian Museum of Natural History, Prešernova 20, P. O. Box 290, SLO- 1001 Ljubljana, Slovenia E-mail: isivec @ pms-lj. si isivec@pms-lj.si Author Stark, Bill P. Box 4045, Department of Biology, Mississippi College, Clinton, Mississippi, U. S. A. 39058 E-mail: stark @ mc. edu stark@mc.edu text Illiesia 2010 6 10 98 112 journal article http://doi.org/10.5281/zenodo.4759732 3c7c2c9b-5ab5-45aa-92f5-f99f8456a1b4 1854-0392 4759732 Phanoperla simplex Zwick Phanoperla simplex Zwick, 1982:114 . Holotype ♂ (British Museum of Natural History). Kuala Lumpur , Malaysia Phanoperla simplex : Zwick & Sivec, 1985:124 . In part Material examined. Thailand : Chiang Mai Province , Chiang Dao National Park , Namtok Srisungwan , 98° 57’ N, 19° 37’ E, 600 m , 26 May 2002 , Chiang Mai University Team , 1♀ ( PMSL ) . Chiang Mai Province , Chiang Dao , 18 May 1983 , 1♂ ( PMSL ) . Khampaeng Phet Province , Khlong Lan National Park , Namtok Klong Lan , 99° 16’ N, 16° 07’ E, 310 m , 19-20 October 2002 , I. Sivec , 1♀ ( PMSL ) . Mae Hong Son Province , Namtok Mae Surin National Park , Mae Nam Pai , 97° 59’ N, 19° 21’ E, 310 m , 15 October 2002 , I. Sivec , 1♀ ( PMSL ) . Same site, 19 March 2002 , 1♂ , 1♀ ( PMSL ) . Remarks. Zwick (1982) reported this species from several Malaysian and Thai sites and additional localities were given in Zwick & Sivec (1985) . The latter study includes specimens from Sumatra which have egg collars markedly different from mainland specimens. In our experience this much variation in such a structure suggests more than one species is involved. In our opinion various populations of P. simplex should be carefully re-examined when material becomes available.