Dichelyne (Dichelyne) spinigerus sp. nov. (Nematoda: Cucullanidae) from the marine fish Otolithes ruber (Sciaenidae) off Iran and first description of the male of Philometra otolithi Moravec et Manoharan, 2013 (Nematoda: Philometridae)

Abstract

Recent parasitological examinations of the marine perciform fish (tigerteeth croaker) Otolithes ruber (Bloch et Schneider) (Sciaenidae) from off Iran yielded one new and one previously known nematode species: Dichelyne (Dichelyne) spinigerus sp. nov. (Cucullanidae) from the host’s intestine in the Persian Gulf and Philometra otolithi Moravec et Manoharan, 2013 (Philometridae) from the ovary in the Persian Gulf and the Sea of Oman. The new species D. spinigerus is mainly characterized by the tail tip of both sexes terminating in two shaply pointed spikes (one dorsal and one ventral) and bearing a pair of minute lateral cuticular spines at its base, situation of both deirids and the excretory pore well posterior to the level of the posterior end of oesophagus, absence of a precloacal sucker and the presence of one or two intestinal caeca. The male and small mature females of the gonad-infecting species P. otolithi are described for the first time, based on light and scanning electron microscopical studies. The male of P. otolithi is most similar to that of P. johnii Moravec et Ali, 2013, but differs from it by the structure of the cephalic end and the number of caudal papillae; both species also differ from each other by the presence of transverse lamellae in the buccal cavity of gravid and subgravid females of P. otolithi, which are missing in those of P. johnii.

Morphological characterization of Dujardinascaris spp. (Nematoda: Anisakidae) from the striped red mullet Mullus surmuletus in the Mediterranean Sea

“…The surface topography of parasites is an important character to understand the intricate relationship between them and their hosts. In all respects the present described nematode is similar to great extant to the specimens that described by Morsy et al . (2013) except some differences included the distribution of papillae on the cephalic region, the large pouches that are attached to lips, also, the distribution of different shapes of papillae.…”

“…It was characterized by slender pointed tail with cuticular ring-shaped striations and absence of caudal alae. D. mujibii described by Morsy et al . (2013) from the intestine of P. pagrus in the Red Sea.…”

Morphological and molecular characterization of cucullanid nematodes including Cucullanus opisthoporus n. sp. in freshwater fish from the Brazilian Amazon

“…It is worth noting that the presence of spines in the tail tip has also been reported in some species of Dichelyne (see Moravec et al , 1999, 2014; Moravec & Justine, 2011). However, these representatives of Dichelyne clearly differ from C. opisthoporus n. sp.…”

Philometrids (Nematoda: Philometridae) in carangid and serranid fishes off New Caledonia, including three new species

“…priacanthi Moravec & Justine, 2009 and P . terapontis Moravec, Gopalakrishnan, Rajkumar, Saravanakumar & Kaliyamoorthy, 2011 [10, 13, 14, 19, 22, 23, 32]. However, the protuberance consisting of two dorsolateral lamellar parts separated from each other by a smooth median field, as shown to occur in the new species, is known only in P .…”