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In: Action and Performance: Models and Tests
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The principal task of the book series Poznań Studies in the Philosophy of the Sciences and the Humanities is to promote those developments in philosophy that respect the tradition of great philosophical ideas, on the one hand, and the manner of philosophical thinking introduced by analytical philosophy, on the other. One of the standing aims of the series in the past has been to provide a forum of exchange of ideas between philosophers of both sides of the Iron Curtain. The series publishes guest-edited volumes devoted to the philosophy of the natural sciences, the social sciences and the humanities as well as to foundational topics in metaphysics, epistemology and social philosophy.

Poznań Studies in the Philosophy of the Sciences and the Humanities is partly sponsored by the Institute of Philosophy of the University of Warsaw.

Bursaphelenchus tiliae sp. n. is described from the bark of dead branches of the small-leaved lime, Tilia cordata, infested with the lime bark beetle, Ernoporus tiliae. The nematode adults and propagative juveniles were present in larval galleries, while dispersal dauer juveniles colonised the Malpighian tubules of adult beetles. Bursaphelenchus tiliae sp. n. is characterised by the body length of 664 (568-817) μm in female and 622 (515-754) μm in male, moderately slender body (a = 41.0 (34.7-47.9) and 43.1 (37.8-51.9) in female and male, respectively), and spicules 20.0 (18.1-21.8) μm long. The extended anterior vulval lip in female, lateral fields with four incisures, long post-uterine sac, and number (7) and arrangement of male caudal papillae, may indicate that B. tiliae sp. n. is closely related to the xylophilus group. It differs from this group by smaller, arcuate spicules with relatively short rostrum, narrow capitulum (5.2-6.9 μm), and indistinct condylus in an almost continuous line with dorsal lamina. Distal third of spicule dorsal contour is usually almost straight. The spicules have a distinct, disk-like cucullus at the terminus. The status of the new species is confirmed by the unique molecular profile of the ITS region (ITS-RFLP) and its close relation to the xylophilus group by DNA sequencing and phylogenetic analysis of the 28S rDNA region. The presence of B. tiliae sp. n. dauer juveniles in Malpighian tubules of their vector bark beetle, E. tiliae, caused limited pathogenicity expressed as a local expansion of the tubule basement membrane and partial degradation of the cellular epithelium.

In: Nematology

Bursaphelenchus taphrorychi sp. n. is described from the bark of European beech, Fagus sylvatica. All propagative stages of the nematode are numerous in larval galleries of the beech bark beetle, Taphrorychus bicolor, while dauer juveniles are transmitted to new breeding trees under the elytra of adult beetles. The new species is characterised by the body length of 782 (717-858) μm in female and 638 (475-789) μm in male, moderately slender body (a = 35.0 (31.7-36.5) and 35.5 (31.4-37.1) in female and male, respectively), spicules 12.0-16.0 μm long, lateral fields with four incisures (i.e., three bands), and the arrangement of the seven male caudal papillae (i.e., a single precloacal ventromedian papilla (P1), one pair of adcloacal ventrosublateral papillae (P2), one postcloacal pair (P3) located at ca 60% of the tail length, posterior to the cloacal aperture, and one pair (P4) of subventral papillae of a similar size as the previous pair, but with somewhat sunken tips, located near base of bursa). In the number and arrangement of caudal papillae, stout and curved spicules with prominent rostrum and condylus, small vulval flap, body narrowed posterior to vulva, four incisures in the lateral fields, and long post-uterine sac, B. taphrorychi sp. n. shares most of the key morphological characters with members of the sexdentati-group. However, the newly described species is unique amongst Bursaphelenchus species of this group by the combination of shape of female tail, shape of spicules, and some other morphometric characters. The close relation of B. taphrorychi sp. n. with members of the sexdentati-group has been confirmed by DNA sequencing and phylogenetic analysis of the 28S rDNA region. The taxonomic separation of the new species is also confirmed by the unique molecular profile of the ITS region (ITS-RFLP). In laboratory rearing, B. taphrorychi sp. n. can develop and reproduce on Botrytis cinerea cultures.

In: Nematology