title: MORPHOLOGICAL STUDIES OF SOME MARINE MASTOGLOIA (BACILLARIOPHYCEAE) BELONGING TO SECTION SULCATAE, INCLUDING THE DESCRIPTION OF NEW SPECIES.
abstract: Epiphytic diatoms on seagrass and seaweed were collected from tropical (e.g., Siladen Island, Celebes Sea, Indonesia and Phú Bài, China Sea, Vietnam), subtropical (e.g., Sharm el-Sheikh, Red Sea, Egypt), and temperate regions (e.g., Patmos Island, Greece) in 2000, 2005, and 2006. Eight species of Mastogloia, belonging to the section Sulcatae, are described mainly through scanning electron microscopy, including two new species to science, M. oculoides and M. sergiana. These species show a differently shaped median depression on the external valve face between the raphe-sternum and the valve margin. Moreover, they lack a developed conopeum or pseudoconopeum, which covers the median depression in other species of the section Sulcatae. This study gives new insights on the ultrastructure of the Mastogloia's valves and provides an update of their current geographical distribution.
authors.affiliation: Department of Life and Environmental Sciences, Polytechnic University of Marche, via Brecce Bianche, Ancona, 60131, Italy.
authors.forename: Chiara
authors.initials: C
authors.lastname: Pennesi
authors.affiliation: Research Division, Canadian Museum of Nature, PO Box 3443, Station D, Ottawa, ON, KIP 6P4, Canada.
authors.forename: Michel
authors.initials: M
authors.lastname: Poulin
authors.affiliation: Department of Environmental Sciences, 2nd University of Naples, via Vivaldi 43, Caserta, 81100, Italy.
authors.forename: Mario
authors.initials: M
authors.lastname: De Stefano
authors.affiliation: Department of Marine Sciences, Polytechnic University of Marche, via Brecce Bianche, Ancona, 60131, Italy.
authors.forename: Tiziana
authors.initials: T
authors.lastname: Romagnoli
authors.affiliation: Department of Marine Sciences, Polytechnic University of Marche, via Brecce Bianche, Ancona, 60131, Italy.
authors.forename: Cecilia
authors.initials: C
authors.lastname: Totti
keywords: Mastogloia; Sulcatae; microphytobenthos; subtropical; taxonomy; temperate; tropical; ultrastructure