Redescription of the deep-sea colonial ascidian Synoicum molle (Herdman, 1886): first record since its original finding during the Challenger Expedition

Maggioni, Tamara; Taverna, Anabela; Tatián, Marcos

doi:10.3897/zse.92.9521

Cited by 5 publications

(6 citation statements)

References 4 publications

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“…Observations: collected at HMS Challenger st. 320, which is the type locality of this species (Herdman 1886: 194-195) and recently found and redescribed off Mar del Plata at 308 m depth, i.e., relatively close to the type locality (Maggioni et al 2016: 181-185). Van Name (1945) included this species tentatively in the genus Synoicum, a denomination that Maggioni et al (2016) confirmed.…”

Section: Genus Synoicum Phipps 1774mentioning

confidence: 94%

“…Aplidium incrustans Herdman 1886, also described from material of the HMS Challenger st. 320, has been referred by Van Name (1945) as a possible junior synonym of S. molle although stating that both species are poorly characterized. Maggioni et al (2016) (Lesson, 1830) Holozoa cylindrica Lesson, 1830: 439. For synonymy see Kott (1969: 29) and Monniot C. & Monniot F. (1983: 36). References and bathymetric distribution in Uruguayan waters: Barranguet (1988): not detailed, between 37-110 m.…”

Section: Genus Synoicum Phipps 1774mentioning

confidence: 99%

“…Investigations performed in the area in recent years have yielded new species (Lagger & Tatián 2013;Rocha et al 2015) and further new data from redescriptions of poorly known ones (e.g. Maggioni et al 2016). In the SW Atlantic, reports of invasive and cryptogenic species have also increased (Tatián et al 2010;Schwindt et al 2014;Skinner et al 2016).…”

Section: Introductionmentioning

confidence: 99%

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Ascidiacea (Chordata, Tunicata) from Uruguay (SW Atlantic): checklist and zoogeographic considerations

Scarabino

Maggioni

Taverna

et al. 2018

MACN

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The diversity of ascidians from the Southwestern Atlantic between 30°S and 40°S (southern Brazil, Uruguay and northern Argentina) remains as one of the poorest known of the West Atlantic. The objective of this work is to compile, analyze and discuss all published records of ascidians from Uruguay. They show the historical relevance of the studies performed by Herdman, Monniot F. and Monniot C. on ascidians collected at deep-sea stations by the HMS Challenger and the RV Atlantis II in the Argentine Basin. Total literature records include 38 ascidian species which are enumerated here for the first time. On the basis of the current knowledge, the ascidian fauna of Uruguayan waters encompasses: a) shallow-water species with temperate distribution (3 spp.); b) shelf and deep-sea species with Antarctic and Sub-Antarctic distribution (13 spp.); c) deep-sea species until now only collected off Río de La Plata (11 spp.); d) deep-sea species displaying a wide distribution (11 spp.). Only nine species have been recorded for the continental shelf; the remaining species were collected either from the slope (21) or the abyssal plain (5) or both deep-sea zones (3). Future research should be directed to record coastline and shelf species, assess the presence of exotic elements, and re-describe enigmatic species first described by Herdman (1882, 1886).

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Section: Genus Synoicum Phipps 1774mentioning

confidence: 94%

Section: Genus Synoicum Phipps 1774mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ascidiacea (Chordata, Tunicata) from Uruguay (SW Atlantic): checklist and zoogeographic considerations

Scarabino

Maggioni

Taverna

et al. 2018

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“…Although submarine canyons are known to be hotspots of benthic biomass and are globally numerous, these environments are very poorly sampled (Del Río Iglesias et al 2012), therefore it is very important to study their biodiversity. Based on the specimens collected during the expeditions to the canyon (2012 and 2013), several new records and new species of Cnidaria Verrill, 1865, Mollusca Linnaeus, 1758 and Echinodermata Bruguière, 1791 have already been published (Cerino & Lauretta 2013;Martinez et al 2014;Farías et al 2015;Signorelli & Pastorino 2015;Maggioni et al 2016;Pastorino & Sánchez 2016;Pastorino 2016Pastorino , 2019Martinez & Penchaszadeh 2017;Pereira & Doti 2017;Bernal et al 2018). Here, we describe a new species of Umbellula from Mar del Plata Submarine Canyon based on specimens collected between 2934 m and 3282 m deep, using both morphological and molecular data.…”

Section: Introductionmentioning

confidence: 82%

Umbellula pomona sp. nov., a new sea pen from Mar del Plata Submarine Canyon (Cnidaria: Octocorallia: Pennatulacea)

Risaro¹,

Williams²,

Villaurreta³

et al. 2020

EJT

768

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Sea pens (Cnidaria: Anthozoa: Pennatulacea) constitute a distinctive group of colonial marine invertebrates. They inhabit the world`s oceans, from shallow to deep waters. Studies about this group in Argentina are scarce, and no species have been described in the area in over a decade. Based on samples collected in Mar del Plata Submarine Canyon at about 3000 m deep we describe a new species of sea pen, Umbellula pomona Risaro, Williams & Lauretta sp. nov. This is a spiculate Umbellula that differs from other species of Umbellula with sclerites, by the number, development and distribution of the autozooids in its terminal cluster, as well as the shape of its axis. Molecular data also distinguishes it from other known species. Of the forty-three described species approximately ten are considered valid for the genus Umbellula, four of them are registered for the South Atlantic Ocean and only three are described for the Antarctic region. Since sampling efforts in this area have been scarce, the number of species of sea pens from the region is likely to increase substantially in the coming years.

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“…Van Name (1945) acknowledged the inadequacy of the original description for a proper species identification. The present material allowed to perform the first exhaustive and complete morphological description of S. molle (see Maggioni et al 2016). (Figure 7).…”

Section: Genus Synoicum Phipps 1774mentioning

confidence: 99%

Deep-sea ascidians (Chordata, Tunicata) from the SW Atlantic: species richness with descriptions of two new species

Maggioni

Taverna

Reyna

et al. 2018

Zootaxa

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The understudied deep-sea benthic communities from the Southwestern Atlantic continental slope (200 m–3000 m depth) were sampled on August 2012 in an area located around 38°S that included the Mar del Plata submarine canyon. In these samplings we found a total of 16 ascidian species from six different families, of which two corresponded to new species. These were: Aplidium meridianum (Sluiter, 1906); Aplidium variabile (Herdman, 1886); Aplidium marplatensis Maggioni & Tatián (sp. nov. present work); Aplidium solitarium Maggioni & Tatián (sp. nov. present work); Synoicum georgianum Sluiter, 1932; Synoicum molle (Herdman, 1886); Synoicum sp.; Polysyncraton trivolutum (Millar, 1960); Sycozoa umbellata (Michaelsen, 1898); Ascidia meridionalis Herdman, 1880; Cnemidocarpa drygalskii (Hartmeyer, 1911); Styela squamosa Herdman, 1881; Pyura pilosa Monniot C. & Monniot F., 1974; Molgula pyriformis Herdman, 1881; Molgula setigera Ärnbäck-Christie-Linde, 1938 and Asajirus indicus (Oka, 1913). Based on morphological evidence, we propose the new synonymy: Molgula setigera Ärnbäck-Christie-Linde, 1938 = Molgula marioni Millar, 1960 = Molgula robini Monniot C. & Monniot F., 1983. We also propose to maintain Molgula pyriformis and Molgula malvinensis as separate species. We report: the extension of the distribution range of Aplidium meridianum, Synoicum georgianum, Polysyncraton trivolutum, Sycozoa umbellata, Cnemidocarpa drygalskii, Pyura pilosa and Molgula setigera, being the first time they are collected off La Plata River; the deepest registers for Synoicum georgianum, Poylsyncraton trivolutum, Sycozoa umbellata, Ascidia meridionalis, Pyura pilosa, Molgula pyriformis and Molgula setigera; and the shallowest register for Synoicum molle.

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Redescription of the deep-sea colonial ascidian Synoicum molle (Herdman, 1886): first record since its original finding during the Challenger Expedition

Cited by 5 publications

References 4 publications

Ascidiacea (Chordata, Tunicata) from Uruguay (SW Atlantic): checklist and zoogeographic considerations

Ascidiacea (Chordata, Tunicata) from Uruguay (SW Atlantic): checklist and zoogeographic considerations

Umbellula pomona sp. nov., a new sea pen from Mar del Plata Submarine Canyon (Cnidaria: Octocorallia: Pennatulacea)

Deep-sea ascidians (Chordata, Tunicata) from the SW Atlantic: species richness with descriptions of two new species

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