12,446 research outputs found
Reptadeonella leilae Almeida, Souza, Sanner & Vieira 2015
No full textReptadeonella leilae Almeida, Souza, Sanner & Vieira, 2015 (Figs. 36–37) Reptadeonella leilae Almeida, Souza, Sanner & Vieira, 2015c: 362, figs. 33–36, 42 (cum syn.). Material examined. UFBA 1174, Camamu Bay, 13°53’S, 38°59’W, 18–20 m, coll. October 2012 (on sponge Halichondria sp.). Remarks. Reptadeonella leilae is characterized by unilaminar encrusting colonies (Fig. 36), autozooids with a tubular peristome, a circular spiramen and no avicularia (Fig. 37) (Almeida et al. 2015c). The species grows on small substrata such as calcareous nodules (Almeida et al. 2015c). Other Reptadeonella species are frequently found encrusting rocks, other bryozoans, calcareous nodules and algae, corals and shells (e.g., Marcus 1939; Soule 1961; Winston 1982b; Hayward & Ryland 1999; Tilbrook et al. 2001; Tilbrook 2006; Winston & Vieira 2013; Almeida et al. 2015c). Reptadeonella leilae was found attached to the smooth-textured sponge Halichondria sp., representing the first record of an association with sponges in the genus. Distribution. Atlantic: endemic to Brazil (Bahia) (Almeida et al. 2015c).Published as part of Almeida, Ana C. S., Souza, Facelucia B. C., Menegola, Carla & Vieira, Leandro M., 2017, Diversity of marine bryozoans inhabiting demosponges in northeastern Brazil, pp. 281-323 in Zootaxa 4290 (2) on page 296, DOI: 10.11646/zootaxa.4290.2.3, http://zenodo.org/record/89271
Reptadeonella brasiliensis ALMEIDA, SOUZA, SANNER & VIEIRA 2015
No full textReptadeonella brasiliensis Almeida, Souza, Sanner & Vieira, 2015 (Fig. 3E, F; Table 4) Reptadeonella brasiliensis ALMEIDA, SOUZA, SANNER & VIEIRA, 2015: P. 357, fIgS 19–28, 39, 40 (CUM SYN.). Material examined. UFBA 1636, UFBA 1645, on valves of Pinctada imbricata. Description. Colony encrusting (Fig. 3E), unilaminar. Autozooids hexagonal to rhomboidal (Fig. 3F), surrounded by 18–25 large, marginal pores. Frontal wall centrally imperforate, finely granular. Primary orifice transversely elliptical, wider than long, occupying about one-sixth of orifice length. Areolar pore transversely narrow, placed immediately proximal to orificial rim, visible in some zooids (Fig. 3F, arrow). Secondary orifice raised, surrounded by a calcification with small nodules around the rim. Suboral avicularium median, triangular, rostrum directed distally, extending about half to one-third of zooidal length. Spiramen (Fig. 3F, circle) crescentic, placed approximately in the center of the frontal wall, below the suboral avicularium. Gonozooid not observed. Remarks. Reptadeonella brasiliensis is among the commonest intertidal cheilostomes in NE Brazil, frequently found attached to hard substrata such as other bryozoans, shells and rocks (Almeida et al. 2015b). Distribution. Western Atlantic: Brazil (Ceará to Bahia; Fernando de Noronha) (Almeida et al. 2015b).Published as part of Almeida, Ana C. S., Souza, Facelucia B. C., Farias, Jamile, Alves, Orane F. S. & Vieira, Leandro M., 2018, Bryozoa on disarticulated bivalve shells from Todos os Santos Bay, northeastern Brazil, with the description of two new species, pp. 401-428 in Zootaxa 4434 (3) on page 407, DOI: 10.11646/zootaxa.4434.3.1, http://zenodo.org/record/129201
Calyptooecia conuma Almeida & Souza 2014
No full text<i>Calyptooecia conuma</i> Almeida & Souza, 2014 <p>(Figs. 72–73)</p> <p> <i>Calyptooecia conuma</i> Almeida & Souza, 2014: 285, figs. 2–5; Almeida <i>et al.</i> 2015b: 5.</p> <p> <b>Material examined.</b> UFBA 1183, Camamu Bay, 13°53’S, 38°59’W, 18–20 m, coll. October 2012 (on sponge <i>Spongosorites</i> sp.).</p> <p> <b>Remarks.</b> <i>Calyptooecia conuma</i> is characterized by small spot-like colonies (Fig. 72), brooding zooids without perioral tubercles, and non-brooding zooids surrounded by 4–5 conical tubercles and a single, asymmetrically placed, suboral avicularium on almost all zooids (Fig. 73) (Almeida & Souza 2014). Only two species of <i>Calyptooecia</i> are known worldwide (Bock 2016). <i>Calyptooecia insidiosa</i> Winston, 1984 is found in the Caribbean where colonies are associated with coral undersurfaces and reef caves (Winston 1984). <i>Calyptooecia conuma</i> commonly encrusts calcareous nodules, shells, coralline algae and sponges (Almeida & Souza 2014). We examined a small colony attached to recesses of the rugose-textured sponge <i>Spongosorites</i> sp. (Fig. 11).</p> <p> <b>Distribution.</b> Atlantic: endemic to Brazil (Bahia) (Almeida & Souza 2014).</p>Published as part of <i>Almeida, Ana C. S., Souza, Facelucia B. C., Menegola, Carla & Vieira, Leandro M., 2017, Diversity of marine bryozoans inhabiting demosponges in northeastern Brazil, pp. 281-323 in Zootaxa 4290 (2)</i> on page 308, DOI: 10.11646/zootaxa.4290.2.3, <a href="http://zenodo.org/record/892719">http://zenodo.org/record/892719</a>
Rhynchozoon brasiliensis ALMEIDA, SOUZA, MENEGOLA & VIEIRA 2017
No full textRhynchozoon brasiliensis Almeida, Souza, Menegola & Vieira, 2017 (Fig. 8C–F; Table 10) Rhynchozoon SP. 2: ALMEIDA et al. 2015A: P. 5. Rhynchozoon brasiliensis ALMEIDA, SOUZA, MENEgOLA & VIEIRA, 2017: P. 312, fIgS 84–89 (CUM SYN.). Material examined. UFBA 1620, UFBA 1623, UFBA 1625, UFBA 1644, UFBA 1647, UFBA 1651, UFBA 1653, UFBA 1657, UFBA 1658, UFBA 1662, UFBA 3357–3387, on valves of Pinctada imbricata. UFBA 1633, on valves of Plicatula gibbosa. Description. Colony encrusting (Fig. 8C), uni- to multilaminar. Zooids polygonal, separated by slightly raised lateral walls. Frontal wall smooth, with small rounded nodules and 10–16 large marginal pores. Primary orifice (Fig. 8D) small relative to zooidal length, commonly obscured by secondary orifice; distal edge with 10–20 rounded denticles; proximal edge with a broadly V-shaped sinus; condyles small, triangular, located at proximal corners of orifice; no oral spines. Secondary orifice well developed, formed by tubercles that can be fused due to increasing calcification. Suboral avicularium (Fig. 8E) small, single, oblique and directed distolaterally; rostrum triangular, with hooked tip and complete crossbar; foramen oval. Frontal avicularia small, diamond-shaped, located near zooidal margins, variable in orientation. Ovicell prominent (Fig. 8F), becoming immersed with increasing calcification; ooecia subglobular and frontally flat; ectooecium non-calcified frontally, leaving a large, circular tabula of completely calcified entooecium. Remarks. Rhynchozoon brasiliensis was misassigned to Rhynchozoon rostratum (Busk, 1856) (Souza 1989; Machado & Souza 1994) and Rhynchozoon verruculatum (Smitt, 1873) (Almeida et al. 2015a), but recently Almeida et al. (2017a) elucidated the identity of this species from Bahia. This species is commonly found attached to sponges, frequently those with a rugose external surface (Almeida et al. 2017a). Distribution. Western Atlantic: Brazil (Bahia) (Almeida et al. 2017a).Published as part of Almeida, Ana C. S., Souza, Facelucia B. C., Farias, Jamile, Alves, Orane F. S. & Vieira, Leandro M., 2018, Bryozoa on disarticulated bivalve shells from Todos os Santos Bay, northeastern Brazil, with the description of two new species, pp. 401-428 in Zootaxa 4434 (3) on page 418, DOI: 10.11646/zootaxa.4434.3.1, http://zenodo.org/record/129201
Differential stability of 2'F-ANA*RNA and ANA*RNA hybrid duplexes: roles of structure, pseudohydrogen bonding, hydration, ion uptake and flexibility
No full text14 pags., 7 figs., 3 tabs.Hybrids of RNA with arabinonucleic acids 2′F-ANA and ANA have very similar structures but strikingly different thermal stabilities. We now present a thorough study combining NMR and other biophysical methods together with state-of-the-art theoretical calculations on a fully modified 10-mer hybrid duplex. Comparison between the solution structure of 2′F-ANA•RNA and ANA•RNA hybrids indicates that the increased binding affinity of 2′F-ANA is related to several subtle differences, most importantly a favorable pseudohydrogen bond (2′F-purine H8) which contrasts with unfavorable 2′-OH-nucleobase steric interactions in the case of ANA. While both 2′F-ANA and ANA strands maintained conformations in the southern/eastern sugar pucker range, the 2′F-ANA strand's structure was more compatible with the A-like structure of a hybrid duplex. No dramatic differences are found in terms of relative hydration for the two hybrids, but the ANA•RNA duplex showed lower uptake of counterions than its 2′F-ANA•RNA counterpart. Finally, while the two hybrid duplexes are of similar rigidities, 2′F-ANA single strands may be more suitably preorganized for duplex formation. Thus the dramatically increased stability of 2′F-ANA•RNA and ANA•RNA duplexes is caused by differencesin at least four areas, of which structure and pseudohydrogen bonding are the most important. © The Author(s) 2010. Published by Oxford University Press.Spanish Ministerio de Ciencia e Innovacion (grants
CTQ2007-68014-C02-02 to CG and BIO2009-10964 to
MO); Fundacion Marcelino Botin (grant to MO);
Canadian Institutes for Health Research (grant to
M.J.D.); Natural Sciences and Engineering Research
Council of Canada (postgraduate scholarship to
J.K.W.). Funding for open access charge: Canadian
Institutes for Health Research
Trematooecia gemmea Almeida & Souza & Menegola & Sanner & Vieira 2014, n. comb.
No full textTrematooecia gemmea (Winston & Woollacott, 2009) n. comb. Cigclisula gemmea Winston & Woollacott, 2009: 281, fig. 32A–F. [Barbados] Remarks. The ectooecium with a median inverted U-shaped membranous area requires reassignment of this species to Trematooecia. It is distinguished from all congeners by large spatulate interzooidal avicularia of varying sizes distributed on the outer edges of colonies (see Winston & Woollacott 2009). Distribution. Caribbean: Barbados.Published as part of Almeida, Ana C. S., Souza, Facelucia B. C., Menegola, Carla M. S., Sanner, Joann & Vieira, Leandro M., 2014, Taxonomic review of the family Colatooeciidae Winston, 2005 (Bryozoa, Cheilostomata), with description of seven new species, pp. 1-61 in Zootaxa 3868 (1) on page 44, DOI: 10.11646/zootaxa.3868.1.1, http://zenodo.org/record/493065
Two new species of cheilostome bryozoans from the South Atlantic Ocean
No full textAlmeida, Ana Carolina S., Souza, Facelucia B. C. (2014): Two new species of cheilostome bryozoans from the South Atlantic Ocean. Zootaxa 3753 (3): 283-290, DOI: 10.11646/zootaxa.3753.3.
Cernotina antonina Holzenthal and Almeida 2003
No full textCernotina antonina Holzenthal and Almeida, 2003 Previous distribuion BRAZIL: Paraná Basin (PR, MG). Material PERNAMBUCO: Vicência (Cachoeira do Engenho Embú 7 ◦ 37 ′ 22.2 ′′ S, 35 ◦ 22 ′ 51.3 ′′ W, 186 m), 1 ♂, 13 November 2011, L. R.C. Lima, W. R. M. Souza cols (UFPE).Published as part of de Souza, Wagner Rafael M., Lima, Lucas R. C., Pes, Ana M. O. & Pinheiro, Ulisses, 2013, Trichoptera (Insecta) from Pernambuco State, northeastern Brazil, pp. 2905-2914 in Journal of Natural History 47 (45 - 46) on page 2912, DOI: 10.1080/00222933.2013.791948, http://zenodo.org/record/519813
Taxonomy of recent Adeonidae (Bryozoa, Cheilostomata) from Brazil, with the description of four new species
No full textAlmeida, Ana C. S., Souza, Facelucia B. C., Sanner, Joann, Vieira, Leandro M. (2015): Taxonomy of recent Adeonidae (Bryozoa, Cheilostomata) from Brazil, with the description of four new species. Zootaxa 4013 (3): 348-368, DOI: 10.11646/zootaxa.4013.3.
FIGURE 10. A–C. Crepidacantha browni n in Ten new species of marine bryozoans (Gymnolaemata: Cheilostomatida) from Brazil
No full textFIGURE 10. A–C. Crepidacantha browni n. sp., UFBA 728.1, holotype. A. Autozooids. B. Detail of primary orifice. C. Ovicelled zooid. Scale bars: A. 200 µm; B, C. 100 µm.Published as part of Almeida, Ana C.S., Larré, Igor R.N.M. & Vieira, Leandro M., 2021, Ten new species of marine bryozoans (Gymnolaemata: Cheilostomatida) from Brazil, pp. 511-537 in Zootaxa 5048 (4) on page 531, DOI: 10.11646/zootaxa.5048.4.3, http://zenodo.org/record/555671
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