Oncosclera navicella Carter 1881
Creators: name: Tavares-Frigo, Maria da Conceição
name: Volkmer-Ribeiro, Cecília
name: Oliveira, Ana Elenice Zanini de
name: Machado, Vanessa de Souza
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Porifera
Demospongiae
Haplosclerida
Potamolepidae
Oncosclera
Oncosclera navicella

description: <i>Oncosclera navicella</i> (CARTER, 1881) (Figures 2D; 3D) <i>Spongilla navicella</i> Carter (1881):87; Bonetto and Ezcurra de Drago, 1967:335. <i>Oncosclera navicella</i> Volkmer-Ribeiro (1970):437; Tavares and Volkmer- Ribeiro (1997): 97; Volkmer-Ribeiro and Pauls (2000):19; Tavares <i>et al</i>. (2003):177. Examined material: BRAZIL, Rio Grande do Sul: Alegrete, EPA of Ibirapuitã, Ibirapuitã River, Estância Sá Brito, 23.III.2011, M.C. Tavares-Frigo and M. Pairet Jr. <i>leg</i>., MCN-POR 8846; 07. VI.2011, MCN-POR 8895; 29.XI.2011, MCN- POR 8901; 27.III.2012, MCN- POR 8914; 05. VI.2012, MCN-POR 8930; 20.XI.2012, MCN-POR 8939; 22.I.2013, M. C. Tavares-Frigo,A. E.Z. Oliveira and M. Pairet Jr. <i>leg</i>., MCN- POR 8946; Ibirapuitã River, Estância Maronna, 07. VI.2011, MCN-POR 8920; 27.III.2012, MCN-POR 8910. Santa do Livramento, Ibirapuitã River, Passo do Ferrão, 25.III.2011, M.C. Tavares-Frigo and M. Pairet Jr. <i>leg</i>., MCN-POR 8842; 02.XII.2011, MCN-POR 8898; 03.II.2012, MCN- POR 8905; 30.III.2012, MCN-POR 8908; 08. VI.2012, MCN-POR 8926; 23.XI.2012, MCN-POR 8936. The sponge encrusts the solid rocky bottom or loose stones in the river, forming permanent crusts varying in thickness from thin to thick, with occasional needle-like projections of up to 15mm in height (Figure 2D) with whitish, yellowish or greyish colouring (Figure 2D). Large, visible gemmules, orange-yellow colour, noticeable particularly in the peripheral region of the crusts, fixed to the substrate, or even forming isolated clusters, were evident and observable to the naked eye. The sponge occurred in three stations (Table 1). The spicule set conformed to the redescription of the species (Tavares and Volkmer- Ribeiro, 1997) (Figure 3D). <b>Remarks</b>: In Rio Grande do Sul State <i>O. navicella</i> was recorded in tributaries of the Lake Guaíba basin, particularly the Jacuí River, with isolated records of the species also in the Ibicuí-Mirim, a tributary of the Ibicuí (De Rosa-Barbosa, 1984). However, <i>O. navicella</i> commonly occurs on the rocky beds of large South American rivers, and is distributed continuously from Venezuela (Volkmer-Ribeiro and Pauls, 2000), in the north to the south of Brazil (Tavares and Volkmer-Ribeiro, 1997; Batista <i>et al</i>., 2003), and in the Paraná-Uruguay Basin, in Argentina (Bonetto and Ezcurra de Drago, 1967, 1970; Ezcurra de Drago and Bonetto, 1969).
description: Published as part of <i>Tavares-Frigo, Maria da Conceição, Volkmer-Ribeiro, Cecília, Oliveira, Ana Elenice Zanini de &amp; Machado, Vanessa de Souza, 2015, Freshwater sponges from the Pampa Biome, Brazil, with description of a new species of Oncosclera, pp. 110-122 in Neotropical Biology and Conservation 10 (3)</i> on page 114, DOI: 10.4013/nbc.2015.103.01, http://zenodo.org/record/2640726
description: {"references": ["CARTER, H. J. 1881. History and classification of the known species of Spongilla. Annals and Magazine of Natural History, 5 (7): 77 - 107. http: // dx. doi. org / 10.1080 / 00222938109459483", "BONETTO, A. A.; EZCURRA DE DRAGO, I. 1967. Esponjas del Noreste argentino. Acta Zoologica Lilloana, 23 (1): 331 - 347.", "VOLKMER-RIBEIRO, C. 1970. Oncosclera - a new genus of freshwater sponges (Porifera- Spongillidae) with redescription of two species. Amazoniana, 2 (4): 435 - 442.", "VOLKMER-RIBEIRO, C.; PAULS, S. M. 2000. Esponjas de agua dulce (Porifera: Demospongiae) de Venezuela. Acta Biologica Venezuelica, 20 (1): 1 - 28.", "DE ROSA-BARBOSA, R. 1984. Reavaliacao da fauna espongologica continental do Estado do Rio Grande do Sul, Brasil, frente a novas coletas. Iheringia, Serie Zoologia, 64: 127 - 148.", "TAVARES, M. C. M.; VOLKMER-RIBEIRO, C. 1997. Redescricao das esponjas de agua doce Oncosclera navicella (Carter, 1881) (Potamolepidae) e Spongilla spoliata Volkmer-Ribeiro &amp; Maciel, 1983 (Spongillidae). Biociencias, 5 (1): 97 - 111.", "BONETTO, A. A.; I. EZCURRA DE DRAGO. 1970. Esponjas de los afluentes del Alto Parana en la Provincia de Misiones. Acta Zoologica Lilloana, 27: 37 - 58.", "EZCURRA DE DRAGO, I.; BONETTO, A. A. 1969. Algunas caracteristicas del bentos de los saltos del rio Uruguay, con especial referencia a la ecologia de los Poriferos. Physis, 28 (77): 359 - 369."]}