Synoptic checklist of ascaridoid parasites (Nematoda) from fish hosts

Liu³

et al. 2012

The little known ascaridoid nematode Raphidascaris (Ichthyascaris) lophii (Wu, 1949) is redescribed and illustrated based on newly collected specimens from the five different marine fishes: Lophius litulon (Jordan) (Lophiiformes: Lophiidae), Lophiomus setigerus (Vahl) (Lophiiformes: Lophiidae), Antennarius hispidus (Bloch et Schneider) (Lophiiformes: Antennaridae), Zeus faber Linnaeus (Zeiformes: Zeidae) and Ostichthys japonicus (Cuvier) (Beryciformes: Holocentridae) from the East and South China Sea. This species differs from all congeners in the subgenus Ichthyascaris by the length of the ventricular appendix (0.52-0.98 mm long), the number and arrangement of caudal papillae (26-32 pairs of precloacal, 3-4 pairs of paracloacal and 8-11 pairs of postcloacal) and the length of the spicules (0.49-0.88 mm long, representing 3.08-4.70% of body length). In addition, nematodes collected from these five different fishes have been characterized using molecular methods by sequencing and analysing the internal transcribed spacer (ITS) of ribosomal DNA. No variation in size and nucleotide polymorphisms is detected within the target sequence among all samples analysed. These data contribute to facilitate an accurate diagnosis of this poorly known nematode. An identification key to the species of the subgenus Ichthyascaris is also provided.

Section: Introductionmentioning

confidence: 99%

Morphological and molecular characterization of Raphidascaris (Ichthyascaris) lophii (Wu, 1949) (Nematoda, Anisakidae) from marine fishes from China, with a key to the species of the subgenus Ichthyascaris

Liu³

et al. 2012

“…According to Bruce et al (1994), the genus contains 52 species. Since then 11 more have been described (Brizzola and Tanzola 1995;Rajyalakshmi 1996Rajyalakshmi , 1997Moravec et al 1996Moravec et al , 1997Nagasawa 1998, 2000;Torres et al 1998;Luo 1999;Torres and Sota 2004;GoparMerino et al 2005).…”

Section: Discussionmentioning

confidence: 99%

A new species of genus Hysterothylacium Ward et Magath, 1917 (Nematoda, Anisakidae) from Liparis tanakae (Scorpaeniformes, Liparidae) from the Yellow Sea, China

2007

A new anisakid nematode, Hysterothylacium liparis sp. nov., is described from the intestine and stomach of the fish, Liparis tanakae (Gilbert et Burke, 1912) (Scorpaeniformes, Liparidae), a fish endemic to the Yellow Sea, China. The new species can be distinguished from the congeners by the absence of lateral alae, the length of the intestinal caecum (1.94-3.35 mm, 58.84-82.47% of oesophageal length), the number and arrangement of the caudal papillae (20-29 precloacal subventral pairs, 1 adcloacal pair and 4 postcloacal pairs), the size of the spicules (1.94-3.74 mm, 4.85-7.30% of body length) and the morphology of the tail tip. This is the first species of adult ascaridoid nematodes to be reported from fishes of the family Liparidae in northern China.

“…The poorly known ascaridoid nematode genus Mawsonascaris Sprent, 1990, has received little attention since it was established by Sprent (1990), and only Bruce and Cannon (1990), Petter et al (1991), Bruce et al (1994), Gibbons (2010) and Li et al (2012) have subsequently mentioned it. There are currently only five species in Mawsonascaris, namely M. australis (Johnston et Mawson, 1943), M. laymani (Mozgovoy, 1950), M. myliobatum (Yin et Zhang, 1983), M. pastinacae (Rudolphi, 1819) and M. zhoui Li, Xu et Zhang, 2012, all of which are recorded from the digestive tract of elasmobranchs (Johnston and Mawson 1943;Mozgovoy 1950;Yin and Zhang 1983;Sprent 1990;Bruce et al 1994;Li et al 2012).…”

Section: Introductionmentioning

confidence: 99%

“…There are currently only five species in Mawsonascaris, namely M. australis (Johnston et Mawson, 1943), M. laymani (Mozgovoy, 1950), M. myliobatum (Yin et Zhang, 1983), M. pastinacae (Rudolphi, 1819) and M. zhoui Li, Xu et Zhang, 2012, all of which are recorded from the digestive tract of elasmobranchs (Johnston and Mawson 1943;Mozgovoy 1950;Yin and Zhang 1983;Sprent 1990;Bruce et al 1994;Li et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Mawsonascaris parva sp. nov. (Nematoda: Ascaridida) from the Arabian whipray Himantura randalli Last, Manjaji-Matsumoto et Moore (Rajiformes: Dasyatidae) off the coast of Iraq

Ali

Al-Salim

et al. 2012

Mawsonascaris parva sp. nov. collected from the Arabian whipray Himantura randalli Last, Manjaji-Matsumoto et Moore (Rajiformes: Dasyatidae) off the coast of Iraq is described and illustrated using light and scanning electron microscopy. The new species differs from its congeners by its small body size (8.11-18.2 mm long), the absence of an intestinal caecum, the slightly unequal spicules (left and right spicule 1.08-2.50 mm and 0.98-2.01 mm long, respectively, representing 12.1-13.7% and 10.1-12.1% of body length), the number and arrangement of male caudal papillae (13-14 pairs in total, arranged as: 7-8 pairs of precloacal, 1 pair of double paracloacal and 5 pairs of postcloacal) and the presence of a single, median precloacal papilla. Thus, a total of six species of Mawsonascaris are now known and this is the first species of this genus recorded from species of Himantura.