Myliocotyle pteromylaeign. et sp.n. (Monogenea, Monocotylidae) parasite branchial dePteromylaeus bovinus(Euselachii, Myliobatidae) en Tunisie

Abstract

Summary: MYLIOCOTYLE PTEROMYLAEI GN. ET SP. N. (MONOGENKA, MONOCOTYLIDAE) GILL PARASITE OF PTEROMYLAEUS BOVINUS(EUSELACHII

Two new species of Myliocotyle (Monogenea: Monocotylidae) from the gills of Aetomylaeus maculatus and A. nichofii (Elasmobranchii: Myliobatidae) from Sarawak, Borneo, Malaysia

“…SEM of additional material would be ideal to resolve this question. It is possible that these ridges are associated with pseudosepta, which were described in M. pteromylaei (see Neifar et al 1999), but we could find no evidence of pseudosepta in M. multicrista. Again, SEM would help resolve this.…”

“…Myliocotyle borneoensis and M. multicrista are the first monogeneans to be recorded from rays collected in waters around Borneo. Neifar et al (1999) described the haptor of M. pteromylaei with eight sclerotised dorsal haptoral accessory structures. The single accessory structure associated with each posterolateral loculus was illustrated as curving sharply through approximately 180º.…”

“…1) instead of one in each posterolateral loculus. Neifar et al (1999) mention that they used scanning electron microscopy (SEM) to count the number of sinuations of the septal ridges in M. pteromylaei, but no micrographs of the ventral or dorsal haptoral surfaces, which would confirm the morphology of the dorsal structures, were provided.…”

“…The diagnosis has been amended to accommodate this change and to include other new characters arising from the description of the following two new species. Neifar et al (1999) noted in their discussion that pseudosepta were present in the posterolateral, lateral and anterior loculi of M. pteromylaei, but that they were difficult to see. The presence of pseudosepta was not included in their generic diagnosis of Myliocotyle or illustrated in their figures.…”

“…Neifar et al (1999) defined Myliocotyle with eight sclerotised accessory structures on the dorsal surface of the haptor; three associated with the dorsal surface of each posterior-most loculus and one associated with each posterolateral loculus. However, we reexamined type material from the BMNH and found that there are two sclerotised structures associated with the dorsal surface of each posterolateral loculus (Fig.…”