New records of the genus Agelas Duchassaing &amp; Michelotti, 1864 (Porifera, Agelasida) off the Amazon River mouth, Brazil, Southwestern Atlantic

Mothes, Beatriz; Campos, Maurício; Lerner, Cléa; Carraro, João Luís; Parra-Velandia, F.J.

doi:10.1590/s1676-06032007000300009

Cited by 3 publications

(1 citation statement)

References 8 publications

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“…10J); they resemble spicules of the South American agelasid Agelas dispar Duchassaing de Fonbressin & Michelotti, 1864, as illustrated by Mothes et al . (2007, fig. 6).…”

Section: Systematic Palaeontologymentioning

confidence: 99%

High diversity of siliceous sponges in Western Tethyan areas during the Eocene: palaeobiogeographical, ecological and taxonomic significance

Łukowiak

Pisera

Stefanska

et al. 2021

Papers in Palaeontology

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Porifera is a clade of globally distributed, early diverging metazoans that are important components of modern aquatic environments. Despite the fact that they were also abundant in the geological past, their fossil record is uneven. For example, little is known about sponge communities that inhabited the Tethyan areas during the Cenozoic. Here, we record an abundant and taxonomically diverse assemblage of middle–late Eocene sponges from east‐central Ukraine. The material consists of preserved whole‐body specimens as well as disassociated spicules. The taxonomic composition of this new assemblage, supplemented with previously published data obtained from sponge materials originating from the middle and upper Eocene of the East European Platform, documents a surprisingly rich sponge community that inhabited shallow waters (depths of 100 m) and comprised at least 30 demosponge species, including two new taxa, Paratetilla milanek Łukowiak and Theonella alexandriae Łukowiak, three hexactinellids and a single homoscleromorph. Additionally, we report the first fossil occurrence of Vetulina, a demosponge genus that currently is found near the Philippines and Australia and in the Caribbean Sea. Some of the sponge taxa recognized were previously noted from the upper Eocene of Australia and New Zealand. This is indicative of their wide distribution during the early Cenozoic and also shows that a non‐interrupted connection existed between the western Tethyan and peri‐Australian areas, explaining the patchy distribution of some sponge taxa in modern seas.

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“…10J); they resemble spicules of the South American agelasid Agelas dispar Duchassaing de Fonbressin & Michelotti, 1864, as illustrated by Mothes et al . (2007, fig. 6).…”

Section: Systematic Palaeontologymentioning

confidence: 99%

High diversity of siliceous sponges in Western Tethyan areas during the Eocene: palaeobiogeographical, ecological and taxonomic significance

Łukowiak

Pisera

Stefanska

et al. 2021

Papers in Palaeontology

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Reef sponges of the genus Agelas (Porifera: Demospongiae) from the Greater Caribbean

Parra-Velandia¹,

Zea²,

Soest³

2014

Zootaxa

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The genus Agelas comprises a group of tropical and subtropical reef sponges that contains large, long-lived, often brightly colored and conspicuous species, distributed throughout the tropica l western Atlantic, temperate northern Atlantic (Mediterranean Sea), and western and central Indo-Pacific Realms. Among tropical sponge genera, Agelas is one with similar species richness in the Greater Caribbean in comparison to the Indo Pacific. The presence of verticillated acanthostyle spicules and a fibroreticulate skeleton of spongin fibres cored and/or echinated by spicules characterize this group. Taxonomic identification relies on a combination of characters, where external morphology and color play a key role, owing to the paucity of microscopical characters. Thus, there is still a great deal of taxonomic confusion, even for the more common species. We carried out a detailed revision of Agelas species throughout the Greater Caribbean area using classic taxonomic tools. Samples and observations covered Colombia, Belize, Jamaica, the Bahamas, Barbados, Curaçao and Venezuela, and included type material from major museum collections. According to our results, the genus Agelas in the Caribbean has at least thirteen valid species, viz. Agelas sceptrum (Lamarck, 1815); A. dispar Duchassaing& Michelotti, 1864; A. dilatata Duchassaing & Michelotti, 1864; A. clathrodes (Schmidt, 1870); A. cervicornis (Schmidt, 1870); A. conifera (Schmidt, 1870); A. schmidti Wilson, 1902; A. tubulata Lehnert & van Soest, 1996; A. wiedenmayeri Alcolado, 1984; A. citrina Gotera & Alcolado, 1987; A. sventres Lehnert & van Soest, 1996; A. repens Lehnert & van Soest, 1998; and A. cerebrum Assmann et al., 2001. We found that variation of microscopic characteristics like skeleton arrangement, number of verticills and their spines, and spicule length and width, can be used as taxonomic tools, but only in a thorough comparison with other species in the same sub-regional context. Thus, a certain degree of familiarity with the genus' regional variation is often required. The richness and distribution of these species in the Caribbean area show north/south differences and other ecological patterns are evident.

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Six New Agelas Species (Demospongiae: Agelasida: Agelasidae) from Kosrae Island, The Federated States of Micronesia

Sim¹,

Kim²

2014

Animal Systematics, Evolution and Diversity

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New records of the genus Agelas Duchassaing & Michelotti, 1864 (Porifera, Agelasida) off the Amazon River mouth, Brazil, Southwestern Atlantic

Cited by 3 publications

References 8 publications

High diversity of siliceous sponges in Western Tethyan areas during the Eocene: palaeobiogeographical, ecological and taxonomic significance

High diversity of siliceous sponges in Western Tethyan areas during the Eocene: palaeobiogeographical, ecological and taxonomic significance

<p><strong>Reef sponges of the genus <em>Agelas</em> (Porifera: Demospongiae) </strong><br /><strong>from the Greater Caribbean</strong></p>

Six New Agelas Species (Demospongiae: Agelasida: Agelasidae) from Kosrae Island, The Federated States of Micronesia

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