Notholca dongtingensis (Rotifera: Monogononta: Brachionidae), a new species from Dongting Lake,China

Notholca dongtingensis n.sp. was found in the second largest lake of China, Dongting Lake. It is related to Notholca labis Gosse, 1887 and N. kozhovi Vassilijewa & Kutikova, 1969. Its main distinguishing taxonomic features are a square-oval lorica, very short anterior spines, anterior lateral spines curving outwards and protrusile posterior margin of the ventral plate. This revised version was published online in July 2006 with corrections to the Cover Date.     

On four new tropical and subtropical Lecane (Lecanidae,Monogononta, Rotifera)

Four new tropical/subtropical species of Lecane are described. L. abanica n. sp. is recorded from Saudi Arabia and the Comoro Islands; L. minuta n. sp. and L. spiniventris n. sp. from the Sultanate of Brunei, and L. nelsoni n. sp. from Brazil. An attempt is made to include characters of the trophi in the diagnosis of these Lecane.     

On a new species of Keratella (Rotifera: Monogononta: Brachionidae)

A new species of planktonic rotifer, Keratella sinensis n.sp.is described from Lake Yaoquan, Heilongjiang, P.R. China. Itprobably also occurs in the Republic of Korea and Japan. The newmorphospecies is characterised by an unusually smooth lorica, andstrongly reduced lateral anterior spines. It is the first exampleof a planktonic freshwater rotifer, endemic to North EastAsia.     

On species of the genus Lophocharis Ehrenberg, 1838 (Rotifera: Monogononta) from Uzbekistan

Three species of Lophocharis (Rotifera: Monogononta), collected from lakes and ponds of Uzbekistan, are described. Two are new to science, and one is recorded for the first time from Uzbekistan. Some data on the variability of these species are given.     

Rotifera from Burundi: the Lepadellidae (Rotifera: Monogononta)

We studied the distribution of Lepadellidae (Rotifera) in freshwater habitats in the floodplain of the River Rusizi in northwest Burundi. Twenty-three species belonging to ColurellaBory de St. Vincent, 1824 (3 species), Lepadella Bory de St. Vincent, 1826 (18 species) and Squatinella Bory de St. Vincent, 1826 (2 species) are recorded, 22 of them are new to Burundi. One of the taxa encountered probably represents an unnamed species. Lepadella arabicaSegers & Dumont, 1993 is recognised as junior subjective synonym of Lepadella eurysterna Myers, 1942 (syn. nov.). Most of the taxa recorded are cosmopolitan or tropicopolitan, two are restricted to the tropical regions of the Old World and Australia, and one, Squatinella lunata Segers, 1993 is an Ethiopian endemic.     

On species of genus Lepadella (Eurotatoria:Monogononta:Colurellidae) from North-Eastern India,with remarks on Indian taxa

Ten species of Lepadella Bory de St. Vincent, 1826, including one new species and one new form, are documented from North-Eastern India. Two of these species are new records from this country and six are new reports from N.E. region. Comments are also made on the status and distribution of various Indian taxa.     

Two New Species of Rotifera from China

Two new rotifera species, Brachionus huangi n. sp. and Lecane chinesensis n. sp. are described and illustrated from different localities in China. The main distinguishing taxonomic features of B. huangi are three pairs of apical spines, a pair of symmetrical caudal spines and a wide caudal projection. For L. chinesensis, the main characteristics are the two-sided small extentions of the foot pseudosegment, the long and innercurved apical spines and ventral lorica anteriorly narrower than the dorsal one.     

On Lecane tanganyikae new species (Rotifera: Monogononta, Lecanidae)

A new species of rotifer, Lecane tanganyikae n.sp., is described from the littoral of Lake Tanganyika and some water bodies in the plain of the Rusizi river near Lake Tanganyika, Bujumbura Province, Burundi. The affiliation of the new species, especially in relation to L. elsa Hauer, is discussed.     

Rotifers from the Canadian high arctic (Devon Island,Northwest territories)

Samples from eight water bodies in the region of Truelove and Sparbo Hardy Lowland, Devon Island (75 ° 30 N, 86 ° 00 W) yielded 70 taxa (4 Bdelloidea, 66 Monogononta) of rotifers, nineteen of which are new records for the Canadian High Arctic.     

On the ecology of Colurellidae (Rotifera)

A material consisting of 45 colurellid rotifers from diverse waters in south and central Sweden was analyzed to reveal their relationships to their substrate. Periphytic substrates were generally preferred. Most species are obviously mobile and more or less euryecious, but a few show a predilection for bog environments. Some colurellids are euryhaline, but when inhabiting fresh water they prefer rivers and other environments with a high oxygen concentration, probably because of problems with osmoregulation.     

Chamaelirium shimentaiense (Melanthiaceae), a new species from Guangdong,China

Chamaelirium shimentaiense (Melanthiaceae), a new species from Shimentai Nature Reserve, Guangdong Province, China is described. This species is similar to C. shiwandashanense and C. viridiflorum in having actinomorphic flowers with six tepals and unilocular anthers, but is easily distinguished from them by its strongly undulate leaf blades with crispulate margins and inconspicuous venation, purplish tepals with a slightly broadened and obtuse apex, and purple-tinged filaments. The infrageneric assignment of this species is discussed and a color plate is provided.     

Diversity of Rotifera (Monogononta) in wetlands of Río Pilcomayo National Park, Ramsar Site (Formosa, Argentina)

The rotifers at this Ramsar site were inventoried for the first time. A total of 114 taxa, belonging 30 genera were found in samples collected from four aquatic habitats in the Río Paraguay basin, in northern Argentina. The rotifer fauna is characterized by a large proportion of cosmopolitan and tropicopolitan species and few species endemic to the Neotropical Region (5%). In the list, 22% of the taxa are new to the Argentine fauna. Colurella sinistra Carlin is a new record to the Neotropical fauna. Ecological and distributional notes on selected species are included.     

Impatiens bomiensis (Balsaminaceae), a new species from Xizang,China

Impatiens bomiensis, a new species of Balsaminaceae from Bomi County, Xizang, China, is described and illustrated. This new species is similar to Impatiens fragicolor based on morphological characters and molecular data, but differs in the shape of the lower sepal, the dorsal petal and the number of globose glands at petiole base.     

Viola umphangensis (Violaceae), a new species from Thailand

Viola umphangensis S. Nansai, Srisanga & Suwanph., a new species from Thailand, is described and illustrated. Morphological, anatomical and palynological characters of V. umphangensis are compared with a similar species, V. betonicifolia Sm. An amended key to the Viola species in the Flora of Thailand account is provided.     

A new and phylogenetically suggestive morphotype ofKeratella lenzi (Rotifer,Monogononta), from Argentina

The morphological characteristics ofKeratella lenzi (f.ayui) f. nov. and the phylogenetic and ecological implications of the appearance of posterolateral spines inK. lenzi Hauer, 1953 are discussed. The morphotype is described after detailed observations using light and scanning electron microscopy, and compared with otherKeratella species of the superspecies valga. The pores of the lateral antennae are described, and proposed as a new character for future comparative research. Some ecological information is also given.     

Additions to the Lecane fauna (Rotifera: Monogononta) of Thailand

Lecane superaculeata. n. sp. is described from three localities in Thailand. It resembles the small, cosmopolitan L. aculeata (Jakubski, 1912) but is distinguished by its larger size and conspicuous anterolateral spines. Additional records of some recently described Thai Lecane species and comments on Oriental endemics are presented L. eswari Dhanapathi is newly recorded for the country.     

A review of the genus Strophidon (Anguilliformes: Muraenidae), with description of a new species

Strophidon McClelland is a muraenid genus with characteristic appearance of a very elongated body, a large mouth cleft and anteriorly placed eyes. The nomenclature and taxonomic history of species within Strophidon are contentious and its members are easily misidentified. In the present study, species of the genus Strophidon are revised based on morphological and molecular data, and five species are considered valid, including S. dawydoffi Prokofiev, S. dorsalis (Seale), S. sathete (Hamilton), S. ui Tanaka and a new species, S. tetraporus. Strophidon tetraporus sp. nov. is described based on 15 specimens from Indonesia, the Philippines, Taiwan and Vietnam with the unique characteristic of the constant presence of the fourth infraorbital pore among species of Strophidon. The intraspecific variation of vertebral formula within S. dorsalis is discussed based on molecular data. Muraena macrurus Bleeker and Thyrsoidea longissima Kaup are synonyms of S. sathete that can be distinguished from the most similar congener S. ui by a longer tail, smaller eyes and more inner maxillary and inner dentary teeth. A key to identify species of Strophidon is provided. The distribution and maximum size of each species are also re-evaluated.