87,658 research outputs found
Hymerhabdia imperfecta Bertolino, sp. nov.
No full textHymerhabdia imperfecta Bertolino, Costa & Pansini sp. nov. urn:lsid:zoobank.org:act: FF9FC2BD-D935-4B83-B345-228C74D457B2 Fig. 2; Table 3 Etymology The new species is named after the presence of imperfect rhabdostyles. Type material Holotype CHILE – Puerto Cisnes • Seno Magdalena E; 44.613885° S, 72.94149° W; depth 30 m; 5–10 Aug. 2016; Marco Bertolino leg.; on a rocky cliff by scuba diving; CILE 63; MSGN 60889. Paratype CHILE – Puerto Cisnes • 1 specimen; Seno Magdalena F (Punta Angostura); 44.6312,35° S, 72.904239° W; depth 25 m; 5–10 Aug. 2016; Marco Bertolino leg.; on a rocky cliff by scuba diving; CILE 43; DISTAV. Description HABITUS. Encrusting, 5 mm thick and 5 cm long (Fig. 2A). Surface rugose and hispid, with visible canals converging towards oscules. Colour in life bright orange (Fig. 2A). Consistency of live specimens friable. SKELETON. Choanosomal skeleton formed by bundles of long styles and tylostyles with heads embedded in basal layer of rhabdostyles and sinuous sub-tylostyles. SPICULES. Megascleres: Smooth styles, long and thin, sometimes with modified heads (Fig. 2B), 800– (888.33)–1000 μm long and 5–(7.16)–10 μm thick. Smooth tylostyles 410–(552.5)–700 μm long and 15–(18.9)–25 μm thick (Fig. 2C). Rather short rhabdostyles with heads variable in shape and with pointed or round extremities (Fig. 2D), 140–(252.42)–415 μm long and 7.5–(9.75)–12.5 μm thick. Rhabdostyles often sinuous or modified into oxeas or strongyles (Fig. 2E). Habitat Species lives on a rocky cliff at a depth of 25–30 m; Chilean fjords. Remarks Out of the nine species of Hymerhabdia previously described around the world (Table 3), none have been recorded along Chilean coasts. The only species of this genus from the Southern Hemisphere is Hymerhabdia oxeata (Dendy, 1924) recorded at a depth of 183 m in northern New Zealand. Hymerabdia imperfecta sp. nov. differs from H. oxeata in having a red colour whereas in H. oxeata the colour is dark brown. As to spicules, H. oxeata has oxeas whereas the new species has tylostyles and rhabdostyles that are not present in H. oxeata. Moreover, the styles of the new species are much larger (Table 3). A comparison with the other 8 species of Hymerhabdia (from the Atlantic Ocean and the Mediterranean Sea reported in Table 3) shows remarkable differences in presence or absence of spicules (oxeas, rhabdostrongyles, toxostrongyles) and in their shape and size.Published as part of Bertolino, Marco, Costa, Gabriele, Bavestrello, Giorgio, Pansini, Maurizio & Daneri, Giovanni, 2020, New sponge species from Seno Magdalena, Puyuhuapi Fjord and Jacaf Canal (Chile), pp. 1-49 in European Journal of Taxonomy 715 on page 7, DOI: 10.5852/ejt.2020.715, http://zenodo.org/record/402239
FIGURE 1 in Acanthella danerii sp. nov. (Demospongiae, Bubarida, Dictyonellidae) from Chilean fjords (South Pacific Ocean)
No full textFIGURE 1. Acanthella danerii sp. nov. (A) Holotype in life; (B) Particular of the skeleton; (C) Styles I; (D) Strongyles; (E) Styles II; (F) Oxeas.Published as part of Costa, Gabriele, Bavestrello, Giorgio, Pansini, Maurizio & Distav, Marco Bertolino, 2020, Acanthella danerii sp. nov. (Demospongiae, Bubarida, Dictyonellidae) from Chilean fjords (South Pacific Ocean), pp. 393-396 in Zootaxa 4790 (2) on page 395, DOI: 10.11646/zootaxa.4790.2.13, http://zenodo.org/record/388946
Comparing Two Different Approaches to the Identification of the Plastic Parameters of Metals in Post-necking Regime
No full textIn the past 20 years the growing computation power availability encouraged experimental mechanics specialists to couple full field measurements with FE methods to raise the so called hybrid experimental-numerical methods. A typical example is the identification of the plastic parameters of metals starting from experimental data. In this work a comparison of two different inverse approaches is presented. A global method, called Kali, identifies the parameters of a plastic law (e.g. Ramberg-Osgood, Hollomon,...) fitting the global experimental data (load, clip-gauge) with FE results obtained using the trial parameters. Instead a full field method, called PlastFemDIC, prescribes DIC measured displacement data of the specimen surface as well as the global ones. To judge the best approach, the silhouette of a round axial-symmetric specimen is compared at various load levels with the FEM results obtained with the parameters identified by the global and local approaches. ©2010 Society for Experimental Mechanics Inc
F. DONA', Tra differenziazione e partecipazione, i nuovi percorsi delle autonomie, in AA.VV, Regionalismo differenziato e specialità regionale: a cura di C. Bertolino, A, Morelli, G. Sobrino, Quaderni del Dipartimento di Giurisprudenza di Torino – Torino, 2020;
No full textIl contributo tratta dell'interazione dei principi di differenziazione e di partecipazione nell'ambito delle autonomie territoriali e dei suoi risvolti in materia di attuazione del principio di uguaglianza sostanziale
Francobollo commemorativo di Maria Montessori (1970)
No full textScheda relativa al francobollo commemorativo di Maria Montessori emesso nel 197
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