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 8009087 92A93902-69B9-4B4E-8FBA-79714AF43FFB Caenoplana coerulea Moseley, 1877 Figs. 11, 12 , 26 . FIGURES 11–16. Illustrations of invasive species of Caenoplanini found in Mexico: dorsal (11) and ventral (12) aspect of Caenoplana coerulea ; dorsal (13) and ventral (14) aspect of Endeavouria septemlineata ; dorsal (15) and ventral (16) aspect of Parakontikia ventrolineata . External diagnosis ( Ogren 1989 ; Luis-Negrete et al . 2011 ). A medium-sized species, up to 8 cm . Dorsal ground color dark blue to purple, rarely brown; median stripe light, variable in color from pale yellow to cream and white. Anterior region reddish orange to pink but can be pale white. Ventral surface blue colored.The eyes extend in a single row around the anterior region, clustering anterolaterally and continuing posteriorly into a staggered submarginal row, but without extending dorsally. The absence of a head plate differentiates it from both species of Bipalium . The large number of eyes differs much from Diporodemus yucatani , Rhynchodemus sylvaticus and both species of Dolichoplana , which only have two. The bluish color and the single and very conspicuous clear-colored median stripe distinguish it from all species of Caenoplanini found in the region. iNaturalist records . MEXICO : CIUDAD DE MEXICO : 1 specimen observed 7 July 2017 ; 19.3206°N , - 99.1947°W ; 2324m a.s.l. ; uploaded by valkyrjan (#6956721) . 1 specimen observed 8 June 2021 ; 19.3312°N , - 99.2355°W ; 2466m a.s.l.; uploaded by cesar_miranda (#91903520).