title: Steinernema pwaniensis n. sp., a new entomopathogenic nematode (Nematoda: Steinernematidae) from Tanzania.
abstract: A new species of entomopathogenic nematode, Steinernema pwaniensis n. sp., belonging to the glaseri group, is described from Tanzania. The infective juveniles of S. pwaniensis n. sp. are characterized by a body length of 978 μm (808-1131), distance from anterior end to excretory pore of 86 μm (80-95) and a tail length of 87 μm (75-95). The ratios a, c and E% of S. pwaniensis n. sp. are substantially lower than those of all other African 'glaseri' group members. The first-generation males of S. pwaniensis n. sp. can be distinguished by a large spicule length of 92 μm (80-97) and by the absence of the caudal mucron, while second-generation males possess a short spine-like mucron. First-generation females have a peg-like tail tip bearing three spine-like projections. Second-generation females can be recognized by a slightly protruding vulva and well-developed post-anal swelling. The new species is further characterized by sequences of the internal transcribed spacer (ITS) and partial 28S regions of the ribosomal DNA. Phylogenetic analyses show that S. pwaniensis n. sp. forms a strongly supported monophyletic clade with two other East African species, S. ethiopiense and S. karii.
authors.affiliation: Laboratory of Entomopathogenic Nematodes,Institute of Entomology, Biology Centre, Czech Academy of Sciences,Branišovská 31, 370 05,České Budějovice,The Czech Republic.
authors.forename: V
authors.initials: V
authors.lastname: Půža
authors.affiliation: Laboratory of Entomopathogenic Nematodes,Institute of Entomology, Biology Centre, Czech Academy of Sciences,Branišovská 31, 370 05,České Budějovice,The Czech Republic.
authors.forename: J
authors.initials: J
authors.lastname: Nermut
authors.affiliation: Laboratory of Entomopathogenic Nematodes,Institute of Entomology, Biology Centre, Czech Academy of Sciences,Branišovská 31, 370 05,České Budějovice,The Czech Republic.
authors.forename: Z
authors.initials: Z
authors.lastname: Mráček
authors.affiliation: Veterinary and Agrochemical Research Centre (VAR),Brussels,Belgium.
authors.forename: S
authors.initials: S
authors.lastname: Gengler
authors.affiliation: International Centre for Insect Physiology and Ecology (ICIPE),Nairobi,Kenya.
authors.forename: S
authors.initials: S
authors.lastname: Haukeland
mesh_terms: D000825:Animal Structures / Q000033:anatomy & histology; D000818:Animals; D001699:Biometry; D016000:Cluster Analysis; D018509:DNA, Helminth / Q000737:chemistry / Q000235:genetics; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics; D021903:DNA, Ribosomal Spacer / Q000737:chemistry / Q000235:genetics; D008853:Microscopy; D010802:Phylogeny; D012339:RNA, Ribosomal, 28S / Q000235:genetics; D017168:Rhabditida / Q000033:anatomy & histology / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification*; D017422:Sequence Analysis, DNA; D013636:Tanzania
chemical_list: D018509:DNA, Helminth; D004275:DNA, Ribosomal; D021903:DNA, Ribosomal Spacer; D012339:RNA, Ribosomal, 28S