02015nas a2200253   4500008004100000245010500041210006900146260009100215300001200306490000700318520110300325653002001428653002501448653001101473653001501484653001801499653000801517653001301525100002601538700002501564700002801589700001701617856012701634       2008                        eng d00aNematodes from the Gulf of California. Part 2. Ceramonema nasobema sp n. (Nematoda: Ceramonematidae)0 aNematodes from the Gulf of California Part 2 Ceramonema nasobema  aPLANTIJNSTRAAT 2, P O BOX 9000, 2300 PA LEIDEN, NETHERLANDSbBRILL ACADEMIC PUBLISHERS  a835-8440 v103 aAn unusual new ceramonematid, Ceramonema nasobema sp. n., is described using light and scanning electron microscopy. It is particularly characterised by the presence of a perioral tube projecting 5.5-7.0 mu m anterior to the lips, moderately long body (0.86-1.09 mm), relatively small number of body annules (121-134), weakly developed zygapophyses, absence of intracuticular vacuoles, pronounced sexual dimorphism in amphid shape with the male ventral amphidial branch extending as far posterior as the 55-80th annule (no extension in females), barrel-shaped stoma, sigmoid and anteriorly inclined vagina without sclerotisations, gubernaculum with dorsal apophyses and relatively uniform cloacal annules. The new species differs from all other known species of Ceramonema especially by the shape of the amphid in males, the strongly projecting perioral tube and the inclined, sigmoid, vagina. Additional data on morphology of Ceramonema algoensis (from Natal Bay, South Africa) are also provided as this species has the most prominent perioral tube among previously described members of the genus.10aBaja California10aCeramonema algoensis10aMexico10amorphology10amorphometrics10aSEM10ataxonomy1 aHolovachov, Oleksandr1 aMundo-Ocampo, Manuel1 aDe Ley, Irma, Tandingan1 aDe Ley, Paul  uhttps://nematoda.myspecies.info/content/nematodes-gulf-california-part-2-ceramonema-nasobema-sp-n-nematoda-ceramonematidae