Stephanbeckia plumosa (Liabeae: Compositae): A new genus and species from southern Bolivia

Material from southern Bolivia, recently collected by Stephan Beck, is described as a new genus and species, Stephanbeckia plumosa (Compositae: Liabeae). Both morphological and molecular data place the genus in the broadly interpreted subtribe Paranepheliinae, but clearly distinct from other members. It differs morphologically by its small size, deciduous plumose pappus, lack of paleae, and compressed bicostate achenes. A key to the genera of the Liabeae is provided.     

Metastevia (Compositae: Eupatorieae): A new genus from Mexico

A new genus and species from Mexico,Metastevia hintonii, is described. The genus, considered to be closely related to and derived fromStevia, differs in seven morphological features from all known species ofStevia. The reasons for recognizing the new genus are discussed in detail.     

A new species of Bidens (Compositae) from Mexico

Bidens longistyla, an annual species with a square stem and yellow rays, known only from the States of Nuevo León and Coahuila, Mexico, is described as new.     

Philactis fayi (Compositae) : A new species from Mexico

The new species is the fourth member of the genus. Morphologically, it is most closely allied toP. liebmannii, but there are ample qualitative and quantitative differences between them. The chromosome numbers ofP. liebmannii andP. nelsonii are 2n = 56 whileP. zinnioides is 2n = 84.Philactis fayi is 2n = 28 and is considered to represent the diploid complement that was probably involved in the production of the other species through hybridization and chromosome doubling.     

A new species of Polymnia (Compositae: Heliantheae) from Mexico

Polymnia mcvaughii from Jalisco, Mexico, is described as new. This herbaceous species appears to belong in the mainstream of evolution within the genus. It exhibits marked affinities to several species, but most closely resemblesP. oaxacana Schultz-Bip. Illustrations of important features are included, along with a list of key characteristics.     

A new species of coreopsis (Compositae) from Mexico

Coreopsis mcvaughii, a small fruticose species known only from the State of Aguascalientes, Mexico, is described as new. It is assigned to sect.Pseudo-Agarista.     

A new species of Townsendia (Compositae) from Utah

An endemic, yellow ray-flowered species ofTownsendia is described asT. aprica from Sevier Co., Utah. It is apparently most closely related toT. montana Nutt. of western Montana and Wyoming south to southern Utah andT. mensana M. E. Jones of northern and western Utah and adjacent Nevada.     

A new species of Psilostrophe (Compositae) from Mexico

Psilostrophe mexicana is described as new and compared with the closely related speciesP. gnaphalodes. Chromosome numbers forP. mexicana are reported asn = 32, a tetraploid number. This new species is the seventh and only polyploid species in the genus.     

A new species of erigeron (Compositae: Astereae) from Chile

Erigeron campanensis, sect.Erigeron, is described as new from Central Chile (Cerro Campana, near Valparaiso). It is most similar toE. fasciculatus, from which it differs in leaf shape, leaf arrangement, pubescence of leaves, stems, and phyllaries, and stigmatic branches, of disc florets.     

A new species of Ascocotyle (Trematoda: Heterophyidae) from the South American sea lion, Otaria flavescens, off Patagonia, Argentina

We describe a new heterophyid species, Ascocotyle (Ascocotyle) patagoniensis n. sp., based on specimens collected from the intestines of the South American sea lion Otaria flavescens from Patagonia (Argentina). Ascocotyle (A.) patagoniensis n. sp. is distinguished from the other species of the subgenus by the number of circumoral spines, which are arranged in 2 rows of 18 to 23. The new species also differs from the other species in having a gonotyl without papillae. The specimens exhibited the widest seminal receptacle described for a species of this subgenus. Species of the subgenus Ascocotyle usually infect fish-eating birds or mammals in freshwater or brackish habitats. Ascocotyle (A.) patagoniensis n. sp. is the first species of the subgenus described from a marine mammal. However, no metacercariae of Ascocotyle spp. were found in 542 marine teleosts from 20 species collected in the same locality. The life cycle of the marine species from the Ascocotyle -complex infecting pinnipeds remains elusive.     

A new marine nematode species of the genus Dinetia (Nematoda: Draconematidae) from South Korea

A new draconematid nematode species of the genus Dinetia Decraemer and Gourbault, 1997 is described from the subtidal sediments and small logs from the eastern coast of South Korea. Dinetia orientalis n. sp. mainly differs from D. nycterobia Decraemer and Gourbault, 1997 by the following characters: large number of cephalic adhesion tubes (38-42 in male and 37-40 in female), number of posterior sublateral adhesion tubes (9-11 in male and 13-14 in female) and posterior subventral adhesion tubes (17-22 in male and 19-24 in female), the buccal cavity (narrow and armed with a dorsal and two weak ventrosublateral teeth), spicules (strongly arcuated and with a pair of strongly dilated gubernaculums around distal part of spicules), and higher "c" value (8.3-10.4 in male and 8.5-10.7 in female). This is the first report on free-living marine nematodes from South Korea, and the first record of the genus Dinetia in the Northwest Pacific.     

A new species of Pegolettia (Compositae - Inuleae) from Namibia

The new species Pegolettia gariepina A . Anderb. from Namibia and the northwestern part of South Africa is described. An illustration and a distributionmap is also provided.     

A new cleistogamous South American species of Eragrostis (Poaceae: Chloridoideae)

Eragrostis riobrancensis (Poaceae, Chloridoideae), a new species with cleistogamous spikelets from sandy river banks of southern Guyana and adjacent Terr. Roraima, Brazil, is described and illustrated.     

Correllia (Compositae: Peritylinae) : A new monotypic genus from southern Chihuahua,Mexico

A new genus,Correllia, and its single species,C. montana, are described from Sierra Mohinora in southwestern Chihuahua, Mexico. The genus belongs in subtribe Peritylinae (Compositae tribe Helenieae) and appears to be most closely related toPerityle.