Yang Tingbao

Diplectanids infesting the gills of the barramundi Lates calcarifer (Bloch) (Perciformes: Centropomidae), with the proposal of Laticola n. g. (Monogenoidea: Diplectanidae)

Four species of the Monogenoidea, Laticola lingaoensis n. sp., L. latesi (Tripathi, 1957) n. comb. [previously Pseudorhabdosynochus latesi (Tripathi, 1957) Kritsky & Beverley-Burton, 1986], L. paralatesi (Nagibina, 1976) n. comb. [previously Diplectanum paralatesi Nagibina, 1976] and Diplectanum penangi Liang & Leong, 1991, are reported from the gills of Lates calcarifer (Centropomidae) from the South China Sea (new geographical records for L. latesi and D. penangi). Collections from off Bathurst Island, Northern Territory, Australia, represent a new geographic record for L. paralatesi; Chilka Lake, Orissa, India, is established as the type-locality for L. latesi. Laticola n. g. (Diplectanidae) is proposed for species with a spoon-shaped copulatory organ with two to four concentric incomplete ridges in the base. Laticola lingaoensis, the type-species of Laticola, is described, and L. latesi and L. paralatesi are redescribed based on specimens from the South China Sea. Pseudorhabdosynochus monosquamodiscusi Balasuriya & Leong, 1995 and Pseudorhabdosynochus yangjiangenesis Wu & Li, 2005 are considered junior subjective synonyms of L. latesi and L. paralatesi, respectively.

Pseudorhabdosynochus summanoides n. sp. (Monogenea: Diplectanidae) from Epinephelus coioides in Dapeng Bay, South China Sea, with Observations on Several Similar Species of Pseudorhabdosynochus Yamaguti, 1958

One new species of diplectanid monogenean, Pseudorhabdosynochus summanoides n. sp., is reported and described from the marine fish Epinephelus coioides off Nan’ao Shenzhen, China. P. summanoides differs from its closest relative, P. summanae (Young, 1968), by the shape of its vaginal hard-parts, which have a tightly twisted distal region and an accessory patch on the proximal curve. During the course of this work, type-material of several species of Pseudorhabdosynochus was examined and aspects of the vagina and haptor are redescribed and/or figured. These species include P. americanus (Price, 1937), P. hargisi (Oliver & Paperna, 1984), P. amplidiscatus (Bravo-Hollis, 1954), P. epinepheli (Yamaguti, 1938), P. riouxi (Oliver 1986), P. melanesiensis (Laird, 1958), P. cupatus (Young, 1969), P. bocquetae (Oliver & Paperna, 1984), P. kritskyi Dyer et al., 1995, P. capurroi Vidal-Martinez, 1998, P. querni (Yamaguti, 1968) and P. summanae (Young, 1969). Several closely related species are considered in terms of their conspecificity: P. hargisi is proposed as a junior synonym of P. americanus; P. capurroi is suggested as a likely synonym of P. kritskyi; and it is suggested that P. cupatus and P. bocquetae may eventually be demonstrated to be consepcific with P. melanesiensis.

Revision of Allobenedenia Yamaguti, 1963 (Monogenoidea: Capsalidae) with the description of A. zhangi n. sp. from Epinephelus fasciatus (Teleostei: Serranidae) in the South China Sea

Allobenedenia Yamaguti, 1963 is revised to include capsalid species with five radial septa in the haptor. Megalocotyloides Bychowsky & Nagibina, 1967 and Allosprostonia Lawler & Hargis, 1968 are considered junior synonyms of Allobenedenia. Eight described species comprise the genus: A. convoluta (Yamaguti, 1937) Yamaguti, 1963 (type-species), A. epinepheli (Bychowsky & Nagibina, 1967) n. comb., A. patagonica (Evdokimova, 1969) n. comb., A. pedunculata Raju & Rao, 1980, A. pseudomarginata (Bravo-Hollis, 1958) n. comb., A. sebastodi (Egorova, 1994) n. comb., A. yamagutii (Egorova, 1994) n. comb. and A. zhangi n. sp. A. ishikawae (Goto, 1894) Yamaguti, 1963 is considered a species inquirenda; Megalocotyloides hongkongensis Wu, Lu & Woo, 2002 is placed in synonymy with A. yamagutii; M. grandiloba (Paperna & Kohn, 1964) Egorova & Aleshkina, 1984 is provisionally returned to Megalocotyle as M. grandiloba Paperna & Kohn, 1964; and specimens identified as M. grandiloba from Serranus cabrilla (Serranidae) by Buhrnheim et al. (1973) are considered an undescribed species of Allobenedenia. A. zhangi n. sp. is described from the external surface of Epinephelus fasciatus (Serranidae) of Allobenedenia. A. zhangi n. sp. is described from the external surface of Epinephelus fasciatus (Serranidae) in the South China Sea and is characterised by having an elongtate proximally uncoiled male copulatory organ extending to near the level of the anterior margin of the ovary, a large prostatic reservoir apparently external to the male copulatory canal, and a submedial protuberance on the dorsal surface of the accessory sclerite of the haptor.

Seasonal population dynamics of Neoechinorhynchus qinghaiensis in the carp, Gymnocypris przewalskii przewalskii, from Qinghai Lake, China

Studies on the seasonal population dynamics of Neoechinorhynchus qinghaiensis (Acanthocephala: Neoechinorhynchidae) in its fish host Gymnocypris przewalskii przewalskii in the Qinghai Lake, China, were carried out with samples taken in May 1991, August 1992, November 1992 and February 1993. Prevalences were higher than 44% in all seasons. The mean intensity of infection was above 124 worms per fish. The maximum intensity of worms recovered from a single fish was 1402 in the autumn of 1992. Differences in the mean abundance, mean intensity and prevalence are not statistically significant relative to season and this is likely to be related to the stable temperatures recorded at the bottom of Qinghai Lake. Over-dispersed distributions of N. qinghaiensis in the host population, due to heterogeneity and feeding habits, were observed in all seasons. The size composition of both sexes of N. qinghaiensis showed males to be less than 3.5 mm and females between 0.5 and 4.25 mm, with the main recruitment phase in the worm populations occurring in the autumn, extending through winter and spring with the lowest recruitment occurring in the summer. The maturation and copulation of worms were mainly focused in the summer season. The sex ratio of female to male was both high in winter (1.51:1) and spring (1.48:1). The higher proportion of females and the change in the worm sex ratio in winter can be attributed to the reduced longevity of male worms. As immature male worms exhibit a higher proportion of the worm population than females in all seasons, further studies are needed to determine if such a situation compensates for the shorter life span of males.

Dactylogyrids (Monogenoidea) parasitizing the gills of spinefoots (Teleostei, Siganidae): revision of Tetrancistrum Goto and Kikuchi, 1917, with descriptions of two new species from Siganus spp. of the Red Sea and Celebes

Nine species of Siganus (Siganidae) and Naso brevirostris (Acanthuridae) were examined for Tetrancistrum spp. (Monogenoidea, Dactylogyridae). Tetrancistrum Goto and Kikuchi, 1917 (Monogenoidea: Dactylogyridae) is redefined, and the following species are reported and/or described from Australia, Egypt, and/or China: T. sigani Goto and Kikuchi, 1917 from S. fuscescens in Australia and China, T. fusiforme (Yamaguti, 1953) Young, 1967 from S. lineatus in Australia, T. polymorphum (Paperna, 1972) comb. n. from S. luridus in Egypt (new locality record), T. strophosolenus sp. n. and T. suezicum (Paperna, 1972) comb. n. from S. rivulatus in Egypt (new locality records), and T. makau nom. n. and T. longispicularis (Yamaguti, 1968) comb. n. from N. brevirostris in Australia (new locality records). Under the present revision, Tetrancistrum comprises 16 species: T. sigani (type species), T. fusiforme, T. indicum (Paperna, 1972) comb. n., T. kala (Yamaguti, 1968) comb. n., T. lebedevi Gupta and Sharma, 1982 (species inquirenda), T. longicirrus (Yamaguti, 1968) comb. n., T. longispicularis comb. n., T. lutiani Tubangui, 1931, T. makau nom. n., T. nasonis Young, 1967, T. oraminii Young, 1967, T. polymorphum comb. n., T. strophosolenus sp. n., T. suezicum comb. n., T. waltairense nom. n. (species inquirenda), and T. yamagutii sp. n. Pseudohaliotrematoides Yamaguti, 1953 and Pseudancyrocephalus Yamaguti, 1968 are placed in junior subjective synonymy with Tetrancistrum. Pseudohaliotrematoides granulosum Yao, Wang, Xia, and Chen, 1998 is a junior subjective synonym of T. sigani; P. polymorphus eilaticus Paperna, 1972, P. polymorphus indicus Paperna, 1972, and P. polymorphus suezicus Paperna, 1972 are elevated to specific rank and transferred to Tetrancistrum as T. polymorphum comb. n., T. indicum comb. n., and T. suezicum comb. n., respectively; T. strophosolenus sp. n. is described from S. rivulatus in Egypt; T. yamagutii sp. n. is described from specimens collected from Siganus sp. from Macassar, Celebes, by Yamaguti (1953); T. indicum Raju and Rao, 1978 is renamed T. waltairense nom. n. to remove it from homonomy with T. indicum (Paperna, 1972) comb. n.; Pseudancyrocephalus duplicatus Yamaguti, 1968 is a junior subjective synonym of T. nasonis Young, 1967; T. makau nom. n. is proposed for P. nasonis Yamaguti, 1968 to avoid homonymy with transfer of the species to Tetrancistrum; P. longicirrus Yamaguti, 1968, P. longispicularis Yamaguti, 1968, and P. kala Yamaguti, 1968 are transferred to Tetrancistrum. T. obesum Caballero, Bravo‐Hollis, and Grocott, 1955 and Pseudohaliotrematoides aurigae Yamaguti, 1968 are retained in Haliotrema Johnston and Tiegs, 1922; T. plectocirra (Paperna, 1972) Lim, 2002 is retained in Glyphidohaptor Kritsky, Galli, and Yang, 2007; P. bengalensis Gupta and Khanna, 1974, P. lutjanusi Gupta and Sharma, 1982, and P. rohdei Gupta and Sharma, 1982 are considered species inquirendae; P. chaetodipteri (Caballero and Bravo‐Hollis, 1961) Yamaguti, 1963 is returned to its original status of Parancylodiscoides chaetodipteri Caballero and Bravo‐Hollis, 1961; Pseudohaliotrematoides falcatus Yamaguti, 1968, P. recurvatus Yamaguti, 1968, P. zancli Yamaguti, 1968 and T. longiphallus (MacCallum, 1915) Price, 1937 are considered incertae sedis; and P. microphallus Yamaguti, 1968 and P. triangulovagina Yamaguti, 1968 are retained in Euryhaliotrematoides Plaisance and Kritsky, 2004.

Monogenea of Chinese marine fishes. XIV. Two new species of Microcotylidae from fishes of the South China Sea

Two new species of microcotylid monogeneans are described. Solostamenides platyorchis n. sp. was obtained from the gills of Mugil cephalus (Mugilidae) and Polylabroides guangdongensis n. sp. from the gills of Sparus macrocephalus, S. berda and Acanthopagrus latus (Sparidae). Solostamenides platyorchis is morphologically similar to S. mugilis (Vogt, 1878) Unnithan, 1971 and S. pseudomugilis (Hargis, 1956) Unnithan, 1971 in the structure of the copulatory organ, but differs from them in the number, arrangement and shape of the testes. Features of P. guangdongensis distinguishing it from other species of the genus include a copulatory organ lacking small spines and an extremely long polar filament on the egg. In view of this species, we suggest omitting the presence of small spines on the copulatory organ as a diagnostic character of the genus Polylabroides Mamaev & Parukhin, 1976.