An annotated checklist of terrestrial flatworms (Platyhelminthes: Tricladida: Geoplanidae) from Mexico, with new records of invasive species from a citizen science platform and a new nomen dubium Author Luna, Manuel De 0000-0002-0746-0507 Universidad Autonoma de Nuevo Leon, Ciudad Universitaria, P. C. 66451, San Nicolas de los Garza, Nuevo Leoon, Mexico scolopendra 94 @ gmail. com; https: // orcid. org / 0000 - 0002 - 0746 - 0507 scolopendra94@gmail.com Author Boll, Piter Kehoma Universidade do Vale do Rio dos Sinos, Avenida Unisinos, 950, 93022 - 750, São Leopoldo, RS, Brazil text Zootaxa 2023 2023-06-06 5297 4 518 532 http://dx.doi.org/10.11646/zootaxa.5297.4.3 journal article 10.11646/zootaxa.5297.4.3 1175-5326 92A93902-69B9-4B4E-8FBA-79714AF43FFB Rhynchodemus sylvaticus (Leidy, 1851) Figs. 24–26 . External diagnosis ( Ball & Reynoldson 1981 ; Ball & Sluys 1990 ). Anterior region flattened and narrowed into a proboscis-like appearance. Usually pale or brownish gray. Along the dorsal surface there are two dark longitudinal stripes which are often united with a dark saddle in the pharyngeal region; rarely, mostly in dark specimens, the stripes are inconspicuous. The ventral surface is pale. There are two large eyes situated distantly from the anterior tip. Very small, up to 15 mm , but usually smaller. The absence of a head plate differentiates it from both species of Bipalium and the paired eyes differ from all recorded Caenoplanini as well as Geoplana multipunctata . This species has a narrow anterior region, unlike Diporodemus yucatani which has a rounded one. Rhynchodemus sylvaticus is much smaller than both Dolichoplana and only has two dorsal stripes. Remarks . This species is found in the Holarctic region ( Ball & Reynoldson 1981 ; Ball & Sluys 1990 ) and is considered European ( Álvarez-Presas et al . 2014 ) iNaturalist Records . MEXICO : JALISCO : One specimen observed 16 October 2019 ; 20.5487 , -104.0392 ; uploaded by chriss666 (#34503888) .