Corvomeyenia epilithosa sp. nov. (Porifera, Metaniidae) no Parque Nacional da Serra Geral, Rio Grande do Sul, Brasil

Volkmer‐Ribeiro, Cecília; Rosa-Barbosa, Rosaria de; Machado, Vanessa de Souza

doi:10.1590/s0101-81752005000400007

Cited by 3 publications

(2 citation statements)

References 2 publications

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“…Corvomeyenia epilithosa Volkmer-Ribeiro, de Rosa- Barbosa & Machado, 2005Corvomeyenia thumi (Traxler, 1895 Spicules: Megascleres are oxeas, generally smooth. Microscleres fall into one or two categories: in the first case with microbirotules straight, with smooth or spiny axis, with regularly cropped rotules, and in the second case with strongly curved and reduced pseudobirotule-like rotules (Figures 10D-I).…”

Section: Corvomeyenia Weltner 1913mentioning

confidence: 99%

A morphological guide of neotropical freshwater sponge spicules for paleolimnological studies

et al. 2023

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Freshwater sponges (Porifera: Spongillida) are sessile invertebrates with skeletons composed of siliceous elements termed spicules. Sponge spicules (megascleres, microscleres, and gemmuloscleres) are characterized by widely varying sizes and shapes. These spicules are well-preserved in lacustrine, wetland, and riverine sediments and hold significant ecological and limnological information that can be applied as diagnostic tools in reconstructions of Quaternary environments. However, problems with taxonomy and the absence of systematic guidelines and standards of identification represent major challenges to utilizing freshwater sponges as a paleo-proxy. Here, we present a well-illustrated extraction protocol and morphological guide to the Neotropical freshwater sponge fauna. This guide is intended to introduce researchers and students to the study of freshwater sponges and their use as a diagnostic tool in paleoecology and paleolimnology.

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Section: Corvomeyenia Weltner 1913mentioning

confidence: 99%

A morphological guide of neotropical freshwater sponge spicules for paleolimnological studies

et al. 2023

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“…The high conductivity of this environment can be explained by the organic matter enrichment. Until now, only six species from Neotropical freshwater sponges were found in humic waters: Corvomeyenia thumi (Traxler, 1895) Barbosa & Machado, 2005(Volkmer-Ribeiro, 1992Volkmer-Ribeiro et al, 2005). Except for the latter, the other species are not restricted to humic waters and have wide distribution, indicating adaptive plasticity to cope with different kinds of inland waters (Volkmer-Ribeiro et al, 2005).…”

Section: Gemmules Of Both Species Submitted To Araraquaramentioning

confidence: 99%

Hatchability of gemmules of two Neotropical freshwater sponges (Porifera: Spongillida)

Calheira

Santos

Pinheiro

2020

Iheringia, Sér. Zool.

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ABSTRACT Inland waters experience extreme environmental conditions determining the evolution of several adaptive strategies of the fauna to these variable conditions. Freshwater sponges produce resisting bodies called gemmules that contain totipotent cells and specialized spicules (gemmuloscleres). Completely formed gemmules exhibit low metabolic rates and may become dormant during periods of environmental stress. Until now, few species had their hatchability tested against different environmental conditions. The purpose of the present study was to test the capacity of hatching gemmules of two freshwater sponge species (Heteromeyenia cristalina Batista, Volkmer-Ribeiro & Melão, 2007 and Radiospongilla inesi Nicacio & Pinheiro, 2011) from inland waters from different localities. Five assays were tested (A): A1 (water of sponge collection site); A2 (Pirangi River water); A3 (Araraquara Pond water); A4 (mineral water) and A5 (A1 after drying gemmules). For each assay, three replicates with 30 gemmules were used. The gemmules were observed daily during 30 days. Data analysis was performed using ANOVA and a posteriori Tukey test. Results showed that gemmules from both species submitted to A3 have not hatched, probably due to its very high conductivity. There was a significant difference between assays (A1, A2 and A4) and between species (F2, 12 = 77.2; P < 0.001). Comparison between A1 and A5 showed significant differences between both assays and species (F1, 8 = 27.5; P < 0.001). Radiospongilla inesi presented high hatching rate at all assays, while H. cristalina had a high hatching rate only on A1 and A5. Results clearly show that each species has a different capacity of hatching.

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Microscleres and gemmoscleres as phylogenetic signals in Spongillida: phylogeny and biogeography of the genus Metania Gray, 1867 (Porifera, Metaniidae)

Castello-Branco

Calor

Menegola

2015

Invert. Systematics

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The genus Metania comprises 11 species of freshwater sponge that are distributed circumtropically: five are Neotropical, three Afrotropical, two Oriental and one Australian. Here we infer the phylogeny of the genus Metania and examine the processes that lead to the current biogeographic distribution using cladistic analysis. One matrix with 26 morphological characters was analysed using the TNT software, and resulted in two most parsimonious cladograms (strict consensus). Our results support monophyly of Metania due to two characters unique to the genus: presence of acanthoxeas and presence of spines in the shaft of the gemmoscleres. Also, the genera Drulia and Houssayella were synonymised with Metania. The family Metaniidae – allocated in the recently proposed order Spongillida – now contains three genera: Acalle Gray, 1867, Metania Gray, 1867 and Corvomeyenia Weltner, 1913. Brooks parsimony analysis of Metania resulted in a single area cladogram showing a Gondwanan pattern: (Neartic (Australian (Oriental (Afrotropical, Neotropical)))) and thus the current distribution is explained by the breakup of Gondwana.

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Corvomeyenia epilithosa sp. nov. (Porifera, Metaniidae) no Parque Nacional da Serra Geral, Rio Grande do Sul, Brasil

Cited by 3 publications

References 2 publications

A morphological guide of neotropical freshwater sponge spicules for paleolimnological studies

A morphological guide of neotropical freshwater sponge spicules for paleolimnological studies

Hatchability of gemmules of two Neotropical freshwater sponges (Porifera: Spongillida)

Microscleres and gemmoscleres as phylogenetic signals in Spongillida: phylogeny and biogeography of the genus Metania Gray, 1867 (Porifera, Metaniidae)

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