El Hafidi F. auteur aut IRD Berrada Rkhami O. auteur aut IRD de Buron I. auteur aut IRD Durand Jean-Dominique auteur aut IRD Pariselle Antoine auteur aut IRD text journalArticle eng text/pdf reformatted digital access Gill monogenean species of Ligophorus Euzet et Suriano, 1977 were studied from the teleost Mugil cephalus Linneaus (Mugilidae) from the Mediterranean and Atlantic coasts of Morocco. We report the presence of L. mediterraneus from both the Mediterranean and Atlantic coast and L. cephali and L. maroccanus sp. n. from the Atlantic coast only. The latter species, which is described herein as new, resembles L. guanduensis but differs from this species mainly in having a shorter penis compared to the accessory piece, a proportionally longer extremity of the accessory piece and a less developed heel. The utility of Ligophorus spp. as markers of cryptic species of the complex M cephalus is discussed in the context of species diversity and geographical distribution of these monogeneans on this host around the world. Presence of different species of Ligophorus on M cephalus sensu stricto from the Atlantic and Mediterranean coast of Morocco demonstrates the usefulness of these species as fine resolution markers of genetic populations of their host, which are known to inhabit those coasts. specialized Ligophorus maroccanus sp n. cryptic species marker geographical distribution Atlantic Ocean Mediterranean Sea MAROC OCEAN ATLANTIQUE MEDITERRANEE 034 052 60 5 433-440 2013 0015-5683 https://www.documentation.ird.fr/hor/fdi:010061401 0015-5683 [F B010061401] https://www.documentation.ird.fr/hor/fdi:010061401 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers17-10/010061401.pdf IRD - Base Horizon / Pleins textes 2014-02-05 2017-10-31 fdi:010061401 fre