A new species of Eumonhystera and three species of Monhystera (Monhysteridae: Nematoda) from Li River,China

A new Eumonhystera species, E. huruii n. sp., together with Monhystera nubiae Eyualem & Coomans, 1996, Monhystera somereni Allgén, 1952, and Monhystera wangi Wu & Hoeppli, 1932 are described from Li river at Guiling, China. Eumonhystera huruii n. sp. is closest to E. barbata Andrássy, 1981, but differs in having shorter anterior setae, much longer reproductive system, shorter and less dorsally bent tail and differently shaped spinneret. M. nubiae and M. wangi are reported here for the first time outside their type locality, whereas M. somereni is reported from China for the first time.     

Aquatic nematodes from Ethiopia III

Six species of the genus Eumonhystera, one of which is new to science, are described from bottom samples of Lake Tana and two associated rivers, River Abbay and R. Gelda, Ethiopia. E. geraerti n.sp. can be identified by being the only species in the genus that combines very posteriorly positioned vulva [V% = 68.2 ± 0.7 (67.3–69.3)] with very anteriorly positioned amphids (Amph-ABE/LRW = 0.8). The other five species encountered, E. dispar (Bastian, 1865) Andrássy, 1981, E. filiformis (Bastian, 1865) Andrássy, 1981, E. pseudobulbosa (von Daday, 1896) Andrássy, 1981, E. mwerazii (Meyl, 1957) Andrássy, 1981, and E. vulgaris (de Man, 1880), Andrássy, 1981, are described in detail. The identities of some of the already described populations of E. dispar, E. filiformis and E. vulgaris are questioned and clearer and better ways of defining each of these three species are suggested. A peritrophic-like membrane on the outer side of the brush-border of the intestine of E. mwerazii, a species reported here for the first time out of its type locality, is reported. Also, scanning electronmicrographs of sectioned and entire specimens of E. mwerazii are presented. All species are reported from Ethiopia for the first time.     

Aquatic nematodes from Ethiopia II

Eight species of the genus Monhystrella, six of which are new to science, are described from bottom samples collected from three lakes, two rivers and a hot spring in Ethiopia. Monhystrella hoogewijsi n. sp. is identified by a distinctive bulge on the lip region, position of the amphids, offset and well developed single pharyngeal terminal bulb, tail shorter than vulva-anus distance, tail elongate-conoid for two-thirds of its length, and by the shape and size of the spinneret outlet; M. jacobsi n. sp. by its slender body, distinctively offset and distended lip region, indistinct and weakly expanding single terminal pharyngeal bulb, and shape and size of the tail and spinneret outlet; M. arsiensis n. sp. by its single terminal pharyngeal bulb, position of amphids, shape and length of tail and spinneret outlet; M. woitorum n. sp. by its hemispherical lip region, double terminal pharyngeal bulb, shape and length of the spinneret outlet, and shape and length of tail; M. ethiopica n. sp. by its bipartite stoma, size of amphid in relation to corresponding body width, filiform tail and shape and length of spinneret outlet. M. atteae n. sp. differs from all known Monhystrella species in having an inflated cap-like lip region and fine crystalloid bodies. M. macrura (de Man, 1880) Andrássy, 1981 and M. lepidura altherri (Juget, 1969) Jacobs, 1987 are reported from Ethiopia for the first time. Crystalloid bodies in the genus Monhystrella is reported here for the first time. Also the presence of a hyaline coelomocyte next to the germinal zone of the reproductive system is reported for the first time in the genus here in all eight species. The structures used in the taxonomy of the genus are reviewed.     

The genus Paradorylaimus Andrássy, 1969 (Dorylaimoidea: Nematoda)

Examination of the type specimens of Dorylaimus parafecundus De Coninck, 1935 showed that the cuticle lacks longitudinal ridges. The species is a typical Laimydorus and is herewith redesignated L. parafecundus (De Coninck, 1935) n.comb. As it is the type species of Paradorylaimus Andrássy, 1969, the latter generic name falls as a synonym of Laimydorus Siddiqi, 1969 which has priority of publication. The three other species included originally in Paradorylaimus are dealt with as follows: P. wilhelmschneideri (Andrássy, 1959) is considered incertae sedis; P. heterurus (Schuurmans Stekhoven & Teunissen, 1938) was shown by Mulk et al. (1978) to belong in the genus Roqueus Thorne, 1964; P. filiformis (Bastian, 1865) is herewith returned to Laimydorus. Dorylaimus tenuistriatus Schneider, 1935 is not identical with L. parafecundus: it is more slender; odontostyle, pharynx and spicules are shorter; supplement number is lower; shape of vulva and the arrangement of the pharyngeal gland nuclei are different. The species is transferred to Laimydorus, becoming L. tenuistriatus (Schneider, 1935) n.comb. Lectotypes are designated for L. parafecundus and L. tenuistriatus. Among the material of L. tenuistriatus are specimens of L. pseudostagnalis (Micoletzky, 1927) and L. sp.     

A new terrestrial nematode species (Rhabditida: Cephalobidae) from spitzbergen

Summary A new species of the soil nematode genus Cervidellus Thorne, 1937 sensu Andrássy, 1984, C. spitzbergensis sp. nov. is described from light and scanning electron microscope studies. The new species differs from all other known species of Cervidellus by the shape of the labial probolae (doubly bifurcate and outwardly projecting basal tines), the coarsely annulated cuticle (annules 2–3 m wide), and the prominent lateral field that expands around the phasmid and extends almost to tail terminus. The diagnostic value of longitudinal striations in the cuticle of cephalobids and the status of the genera Cervidellus and Stegelletina Andrássy, 1984 are discussed.     

Nematodes from saline and freshwater lakes of the Vestfold Hills,East Antarctica,including the description of <Emphasis Type="Italic">Hypodontolaimus antarcticus</Emphasis> sp. n.

The invertebrate fauna of many Antarctic ice-free areas, even those close to permanent research stations, can be poorly known. Here we describe some nematodes from freshwater and saline, marine-derived lakes of the Vestfold Hills, East Antarctica. The freshwater lakes contained the widespread East Antarctic endemic species, Plectus frigophilus Kirjanova, 1958. The saline lakes were inhabited by two recently described species, Halomonhystera halophila Andrássy, 2006 and Halomonhystera continentalis Andrássy, 2006, and by a new species described in this report, Hypodontolaimus antarcticus sp. n. Originally marine but now brackish Highway Lake contained a nematode fauna with both freshwater and marine-derived components. The nematode fauna of Antarctica now consists of 54 named species, 22 of which are found in East Antarctica.     

疏花长柄山蚂蝗复合体(豆科)的修订

通过文献、标本研究,结合野外考察及数据统计分析,确认疏花长柄山蚂蝗复合体包括4种1亚种,讨论了各分类群的重要性状,并给出了新的检索表。将湘西长柄山蚂蝗(Hylodesmum laxum subsp.falfolium)处理为原亚种的新异名;订正了《中国植物志》和《Flora of China》等著作中该类群的几个错误的地理分布,记载了我国几个省区的分布新记录,并给出了凭证标本。     

On some predatory nematodes from the Okavango Delta,Botswana

Five species of Mononchida and Mononchulus nodicaudatus (v. Daday, 1899) Cobb, 1918 are reported from freshwater sediments at or near Boba Island, Okavango Swamps, Botswana. Illustrations are given for Mylonchulus lacustris (Cobb N.A. in Cobb MX, 1915) Andrássy, 1958, Iotonchus risoceiae (Carvalho, 1955) Andrássy, 1958 and Cobbonchus spec. Two species of Mononchus Bastian, 1865, M. aquaticus Coetzee, 1968 and M. truncatus Bastian, 1865 were also found. The usually rare species M. nodicaudatus was well represented and its juvenile stages are described for the first time.     

Descriptions of Eumonhystera borealis n. sp., Sphaerolaimus occidentalis n. sp., and a Redescription of S. gracilis de Man 1876 (Nemata) from Bothnian Bay,Baltic Sea

The free-living nematodes Eumonhystera borealis n. sp., Sphaerolaimus occidentalis n. sp., and S. gracilis de Man 1876 from Bothnian Bay in the northern Baltic Sea are described and illustrated. Eumonhystera borealis n. sp. differs from other species by its small body size (314-393 μm), narrow body (a = 37-49), and large anterior amphids. In Sphaerolaimus occidentalis n. sp. the amphids are posterior to the buccal cavity, and it differs from other similar species by having two sclerotized rings in the posterior part of the buccal cavity. An intersex is reported for S. gracilis. Sphaerolaimus gracilis is cannibalistic or a predator of other species, with a preference for E. borealis n. sp. Sphaerolaimus occidentalis n. sp. coexists with S. gracilis at depths of 80 m but not at 12 m.     

Myoretronectes paranaensis n. gen. et sp., a new freshwater genus of the family Retronectidae (Turbellaria, Catenulida) from the Paraná, Argentina

Myoretronectes paranaensis, gen. et sp. n., from lotic sandy bottoms of the Paraná river, Argentina, is described. The establishment of the new genus is based on the presence of a non-ciliated pharynx, a discrete oesophagus, and a strong muscle system surrounding the distal pharynx. A new emended diagnosis of the family Retronectidae is presented. Myoretronectes paranaensis apparently cohabits with the oligochaete Narapa bonettoi Righi & Varela, 1983 and the copepod Parastenocaris sp.     

Variation at isozyme loci in wildVigna unguiculata (Fabaceae,Phaseoleae)

An electrophoretic comparison of variation at 37 presumptive isozyme gene loci was performed for 55 wildVigna unguiculata accessions. The analysis included seven subspecies, covering the whole range of variation available in wildVigna unguiculata. The results of the isoenzymatic study broadly confirmed the previous infraspecific classification inferred from morphological data. Although the southern taxa (e.g., subsp.tenuis, subsp.stenophylla) are as yet too poorly sampled to discuss in depth, wildVigna unguiculata can be divided into one mainly autogamous annual group (including subsp.pubescens and var.spontanea) and several widely divergent perennial subspecies.     

Six new species of the genus Diplopeltula (Nematoda: Diplopeltidae) with remarks on the heterogeneity of the taxon

Six new Diplopeltula species are described: D. pulchra sp.n., D. belgica sp.n., D. striolata sp.n. and D. curta sp.n. (Southern Bight of the North Sea), D. nellyae sp.n. and S. pumila sp.n. (New Caledonia). Diplopeltula indica Gerlach, 1962 is redescribed from Guadeloupe (FWI). Based on the examination of these seven Diplopeltula species, the genus has been reappraised. The systematic position of the other genera of the Diplopeltidae Filipjev, 1918 is also discussed. Diplopeltoides Gerlach, 1962 is moved from the Aegialoalaimidae Lorenzen, 1981 to the Diplopeltidae.     

The taxonomy of Tylenchorhynchinae (Nematoda: Tylenchida) with longitudinal lines and ridges

Summary The taxonomy of those Tylenchorynchinae which have longitudinal lines or ridges on the cuticle is discussed. Dolichorhynchus is restricted to species with four incisures in the lateral field, lateral vulval flaps and a terminally notched bursa. D. prophasmis n. sp. is described. Neodolichorhynchus n. g. is erected for those species previously in Dolichorhynchus which have no lateral vulval flaps and a normal bursa, including: N. microphasmis (Loof, 1959) n.comb., N. judithae (Andrássy, 1962) n.comb., N. sulcatus (de Guiran, 1967) n.comb., and N. gladiolatus (Fortuner & Amougou, 1973) n.comb. Tessellus n.g. is proposed for T. claytoni (Steiner, 1937) n.comb. and T. pachys (Thorne & Malek, 1968) n.comb. the only remaining Tylenchorhynchus species with longitudinal cuticular lines. They are characterized by a rounded non-offset lip region, four incisures in the lateral field and a cuticular annulation divided into prominent blocks by deep longitudinal cuticular lines.     

Three New Species of Etamphidelus Andrássy, 1977 (Nemata: Alaimidae) in Southern Chile

Three new species of Etamphidelus are described from Orange Bay, Hoste Island, Chile. All three are distinguished from previously described species by their numerous longitudinal cuticular ridges. E. acucephalus n. sp. is further distinguished by its extremely narrowed anterior body region and posteriorly situated amphids. E. fueguensis n. sp. is distinguished from E. acucephalus by its anteriorly located amphideal fovea, fewer cuticular ridges, smaller V-an/tail ratio and presence of males. E. yamani n. sp. is more similar to E. fueguensis n. sp. differing from it by a wider head end, more posteriorly located excretory pore, longer V-an/tail ratio, more numerous cuticular ridges and smaller spermatozoa. E. puccinelliae (Lorenzen, 1966) Andrássy, 1977 is transferred to Paramphidelus puccinelliae (Lorenzen, 1966) n. comb. The generic diagnosis of Etamphidelus is amended, and a key to species is presented.     

A revision of the <Emphasis Type="Italic">Heterospathe elegans</Emphasis> (<Emphasis Type="Italic">Arecaceae</Emphasis>) complex in New Guinea

Summary  Three closely affiliated species of Heterospathe Scheff. (H. elegans (Becc.) Becc., H. humilis Becc. and H. versteegiana Becc.) from New Guinea are revised. They are reduced to a single species which is divided into two subspecies, and the new combination H. elegans subsp. humilis (Becc.) M. S. Trudgen & W. J. Baker is made. The subspecies can be readily distinguished by their growth habit. Epitypes are designated for the three previously published names, as informative material on the habit is not included in the existing type specimens. A new, potentially related species is described as H. pullenii M. S. Trudgen & W. J. Baker.     

Succession in zooplankton and hydrophytes of a seasonal water on the west coast of South Africa

Paramesochra mielkei sp.n. is described and figured from the interstices of subtidal sandy sediments off the SW Dutch coast. Kunz' (1981) phylogenetic scheme of the Paramesochridae Lang, 1948 is re-examined and it is suggested that the family comprises two phyletic lines which originated early in paramesochrid evolution. Translation into Linnean hierarchies implies the establishment of two new sub-families. Within the primitive Diarthrodellinae subfam. n., Tisbisoma Bozic, 1964 is ancestral to Diarthrodella Klie, 1949 s.l. and Rossopsyllus Soyer, 1975. Remanea Klie, 1929 is transferred to the Paramesochrinae subfam. n. which comprises the genera of both the Scottopsyllus- and the Paramesochra-group. The aberrant genus Caligopsyllus Kunz, 1975, standing close to Apodopsyllus, is removed from the Paramesochra-group. P. brevifurca Galhano, 1970 is splitted into two subspecies and replaced in the genus Paramesochra. An attempt is made to assess the phyletic interrelationships of the Paramesochra-species and the resulting cladogram splits the genus into four species-groups. P. mielkei sp.n. is referred to the dubia-group and seems to be closely related to P. borealis Geddes, 1981. Finally, an amended diagnosis and a revised key to the species of the genus Paramesochra are presented.     

Differentiation patterns in the E. MediterraneanScutellaria rubicunda group (Lamiaceae)

Strict sterility barriers where found between theScutellaria populations on Sicily and the Greek populations. The material from Samos is separated by a strict sterility barrier from the other Greek populations. In contrast, the populations on mainland Greece and adjacent islands are all ± interfertile. Three species are recognized,S. rubicunda Hornem., endemic to Sicily, andS. brevibracteata subsp.icarica, endemic to Samos and Ikaria. All other populations are referred toS. rupestris with eight subspecies, most of which are endemic to one island or to one mountain. Three new subspecies are described, viz. subsp.rechingeri and subsp.olympica, endemic to mt Vourinos and mt Olympus in North Greece, respectively, and subsp.caroli-henrici, native to the Malea peninsula of Peloponnisos. The phytogeographical connections and genetic differentiation within and between populations are discussed.Dedicated to Prof. DrK. H. Rechinger on the occasion of his 80th birthday.     

Eight new Tricoma species (Nematoda,Desmoscolecidae) from a deep-sea transect off Calvi (Corsica,Mediterranean)

Eight new species of the genus Tricoma are described from the Mediterranean: Tricoma (Tricoma) apophysis sp.n., Tricoma (T.) latispicula sp.n., Tricoma (T.) corsicana sp.n., Tricoma (T.) pygmaea sp.n., Tricoma (T.) vincxae sp.n., Tricoma (T.) duopapillata sp.n., Tricoma (T.) setosa sp.n. and Tricoma (Quadricoma) tripapillata sp.n.. All are noteworthy for being small.     

Genetic diversity and phylogenetic position of the subclass Astomatia (Ciliophora) based on a sampling of six genera from West African oligochaetes (Glossoscolecidae, Megascolecidae), including description of the new genus Paraclausilocola n. gen

To more confidently assess phylogenetic relationships among astome ciliates, we obtained small subunit (SSU) rRNA sequences from nine species distributed in six genera and three families: Almophrya bivacuolata, Eudrilophrya complanata, Metaracoelophrya sp. 1, Metaracoelophrya sp. 2, Metaracoelophrya intermedia, Metaradiophrya sp., Njinella prolifera, Paraclausilocola constricta n. gen., n. sp., and Paraclausilocola elongata n. sp. The two new species in the proposed new clausilocolid genus Paraclausilocola n. gen. are astomes with no attachment apparatus, two files of contractile vacuoles, and an arc-like anterior suture that has differentiations of thigmotactic ciliature on the anterior ends of the left kineties of the upper surface. Phylogenetic analyses were undertaken using neighbor-joining, Bayesian inference, maximum likelihood, and maximum parsimony. The nine species of astomes formed a strongly supported clade, showing the subclass Astomatia to be monophyletic and a weakly supported sister clade to the scuticociliates. There were two strongly supported clades within the astomes. However, genera assigned to the same family were found in different clades, and genera assigned to the same order were found in both clades. Thus, astome taxa appear to be paraphyletic when morphology is used to assign species to genera.     

New species of Neophyllobius and Tycherobius (Acari, Camerobiidae) from turkey

Two new species of Neophyllobius (Acari, Camerobiidae) viz. N. populus sp. n., N. karabagiensis sp. n., and a new species of Tycherobius (Acari, Camerobiidae), Tycherobius dazkiriensis sp. n., are described from Turkey and illustrated based on females and a protonymph. A key to the known species of Tycherobius is presented.