<p class="HeadingRunIn"><strong><em>Laonice</em> (Annelida: Spionidae) from South and Central America</strong></p>

Abstract

Laonice species from South and Central America are reviewed based on museum collections and new material collected in southern Brazil. An identification key is provided to 10 species including three previously described species, L. antarcticae Hartman, 1953, L. weddellia Hartman, 1978, L. branchiata Nonato, Bolívar &amp; Lana, 1986, and three species represented by poor material, insufficient for final taxonomic diagnosis. Four new species, L. petersenae sp. nov., L. aperata sp. nov., L. parvabranchiata sp. nov., and L. pinnulata sp. nov. are described and illustrated. Earlier records of L. cirrata (M. Sars, 1851) from South America are not confirmed. The loss of neuropodial sabre chaetae and hooks until a certain size in terms of numbers of adult chaetigers is here used for the first time as a specific character with Laonice species.

Molecular identification and larval morphology of spionid polychaetes (Annelida, Spionidae) from northeastern Japan

“…Larvae of this species were rare in the planktonic community found in Onagawa Bay in September 2011 and October 2012. Although two parallel rows of encircling vesicles of egg envelope, similar to those of Aonides pretrochophore and trochophore stages, were reported in oocytes of Laonice species (Radashevsky and Lana 2009), this characteristic was not observed in early larval stages with egg envelope in the present study (Fig. 4D).…”

How complex is the Naineris setosa species complex? First integrative study of a presumed cosmopolitan and invasive annelid (Sedentaria: Orbiniidae)

“…n., neuropodial lobes are enlarged, markedly flat, and folded with irregular boundaries. This may also be an adaptation to increase the surface area for oxygen uptake, such as in other polychaetes (Hartman 1951;Nonato et al 1986;Radashevsky & Lana 2009;Glasby et al 2021).…”

New Prionospio and Laubieriellus (Annelida: Spionidae) species from Southeastern Brazil

“…Spionid taxonomic studies in Brazil are still limited, as most of them are geographically restricted to the southern and southeastern coasts of Brazil and frequently limited to shallow coastal environments (except Barroso 2010 andPaiva 2017). Only a few genera have been studied in detail, such as Laonice Malmgren, 1867 (Nonato et al 1986;Radashevsky & Lana 2009), Scolelepis Blainville, 1828 (Rocha et al 2009;Rocha & Paiva 2012), Pseudopolydora Czerniavsky, 1881 (Radashevsky & Migotto 2009), Dipolydora Verrill, 1881 (Radashevsky & Nogueira 2003), Polydora Bosc, 1802(Radashevsky et al 2006, Trochochaeta Levinsen, 1884(Radashevsky et al 2018 and Spiogalea Aguirrezabalaga & Ceberio, 2005 (Peixoto & Paiva 2017). Largescale studies are scarce, being restricted to Bolívar & Lana (1987) for the continental shelf of Paraná State, Southern Brazil, and Paiva & Barroso (2010) for the continental slope of Campos Basin, Rio de Janeiro State, Southeastern Brazil.…”