The heart urchin Homolampas fragilis (A. Agassiz, 1869) (Echinoidea: Echinodermata) from the Brazilian Coast
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The heart urchin Homolampas fragilis (A. Agassiz, 1869) (Echinoidea: Echinodermata) from the Brazilian Coast Cynthia Lara de Castro Manso 1
&
Jéssica Prata 2,3
&
Walter Ramos Pinto Cerqueira 4
Received: 5 May 2020 / Revised: 7 July 2020 / Accepted: 9 July 2020 # Senckenberg Gesellschaft für Naturforschung 2020
Abstract The echinoid Homolampas fragilis (A. Agassiz,1869) (Echinodermata) is recorded for the first time in the Brazilian coast from the Continental shelf of the State of Ceará. The specimens were classified based on their distinct morphological characters, including the fragile test, primary tubercles non-crenulated and with deep areoles, absent peripetalous fasciole, without aboral tubercles on the interambulacrum 5, three to four genital pores, and posterior prolongation of the labrum, not reaching the second adjacent labral plate narrow and wedge-shaped, extending to second or third ambulacral plate; only just contacting sternal ambulacral plates. This species usually inhabits tropical waters from the Caribbean Sea, Gulf of Mexico, and Florida Strait. Its bathymetry is expanded from 360–3550 to 34–3550 m deep. In the present work, we provide morphological and geographical updates on Homolampas fragilis found in the Brazilian coast. Keywords Spatangoida . Taxonomy . Tropical Southwestern Atlantic
Introduction The representatives of the order Spatangoida L. Agassiz, 1840 are known as “heart urchins”. This group is diverse and occurs in almost all oceans. Spatangoida is usually found buried in clean sandy/mud bottoms (Smith 2004). They are recorded in the Brazilian coast: Meoma ventricosa (Lamarck, 1816), Anabrissus damesi (A. Agassiz, 1881), Schizaster floridiensis Communicated by S. Stöhr * Jéssica Prata [email protected] 1
Departamento de Biociências, Universidade Federal de Sergipe, Campus Prof. Alberto Carvalho, Cidade Universitária, S/n°, Itabaiana, Sergipe 49500-000, Brazil
2
Setor de Biologia Animal, Departamento de Ciências Biológicas, Universidade Federal da Paraíba, Campus II, Rodovia BR 079 - Km 12, S/n°, Areia, Paraíba 58397-000, Brazil
3
Laboratório de Invertebrados Paulo Young, Departamento de Sistemática e Ecologia, Universidade Federal da Paraíba, Campus I, Joao Pessoa, Paraíba 58051-900, Brazil
4
Divisão de Invertebrados Aquáticos. Museu de Zoologia, Departamento de Ciências Biológicas, Universidade Estadual de Feira de Santana, Avenida Transnordestina, S/n°, Feira de Santana, Bahia 44036-900, Brazil
Kier & Grant, 1965, Agassizia excentrica A. Agassiz, 1869, Moira atropos (Lamarck, 1816), Brissopsis atlantica Mortensen, 1907, Homolampas lovenioides Mortensen, 1948, and Plagiobrissus grandis (Gmelin, 1791) (Manso 2004; Ventura et al. 2006; Prata-Oliveira et al. 2010; Gondim et al. 2018; Moura and Souto 2020). The family Maretiidae Lambert 1905 comprises 8 genera (Kroh and Mooi 2020). Maretiidae is similar to Spatangidae Gray 1825 and Loveniidae Lambert 1905, but differs by its long and wedge-shaped labral plate, short triangular sternum, strong inde
