New or little known demosponges (Porifera) from Espírito Santo coast and seamounts (Brazil)

Abstract

ABSTRACT. Phorbas capixaba sp. nov. is described from 54 m depth off Guarapari, diagnosed by its two clear-cut categories of isochelae from Phorbas spp. known from the Western Tropical Atlantic. Four nomina nova are proposed for homonyms in Phorbas spp.: P. bergmontae nom. nov. for P. areolatus Bergquist & Fromont, 1988, preoccupied by P. areolatus (Thiele, 1905); P. burtoni nom. nov. for P. arborescens sensu (Burton, 1956), preoccupied by P. arborescens (Ridley, 1884); P. hechteli nom. nov. for P. ramosus (Hechtel, 1983), preoccupied by P. ramosus (Lendenfeld, 1888; in part -composite species); P. tanitai nom. nov. for P. purpureus (Tanita, 1961), preoccupied by P. purpureus (Carter, 1886). Three little known species are redescribed: Aplysina alcicornis Pinheiro et al., 2007;Mycale (Aegogropila) escarlatei Hajdu et al., 1995 and Yucatania sphaeroidocladus (Hartman &Hubbard, 1999 Yucatania sphaeroidocladus (Hartman & Hubbard, 1999) Figs 2-19, Tab. I Diagnosis. The only Thrombidae with demotriaenes. Description. The largest specimen available, still an obvious fragment, is MNRJ 4557. It is cushion shaped, 12 x 9 x 5 cm (largest width, smallest width, thickness). Specimens can agglutinate abundant sediment (MNRJ 5872) and/or grow intermingled to abundant siliquariid gastropod shells (Siliquaria modesta; MNRJ 4557). Consistency of the sponge, where devoid of inclusions, is firm but compressible, somewhat friable. Texture is mostly rough also as a consequence of all the inclusions. Oscula were not seen, possibly due to the macerated condition of most samples. Colour alive (on deck) was reported as beige (MNRJ 4387D, 4562, 6192), white (MNRJ 4574) and lively yellow (MNRJ 5868B). Skeleton (Fig. 4). Confused architecture. Acanthodemotriaenes far outnumber acanthotriaenes. These spicules are densely packed both in the ectosome and choanosome, appearing at places to be somewhat juxtaposed in a palisade manner, while in other areas they are completely criss-crossing one another. Amphiasters were only spotted in dissociated spicules' mounts. Spicules (Tab. I). Megascleres.

Some shallow-water hydroids (Cnidaria: Hydrozoa) from the central east coast of Florida, USA

“…As discussed in greater detail elsewhere , that name was rejected prior to 1961 as a junior secondary homonym and it has now been replaced by the binomen Dynamena dalmasi (Versluys, 1899). Typically found on coastal reefs and banks (e.g., Cain 1972, as Sertularia dalmasi;Defenbaugh 1974, as S. dalmasi;Wenner et al 1984;Rezak et al 1985;Grohmann et al 2003Grohmann et al , 2011Hajdu & Teixeira 2011), the reported depth range of D. dalmasi is from 8-366 m (Calder & Cairns 2009).…”

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“…As discussed in greater detail elsewhere (Calder 1991a), that name was rejected prior to 1961 as a junior secondary homonym and it has now been replaced by the binomen Dynamena dalmasi (Versluys, 1899). Typically found on coastal reefs and banks (e.g., Cain 1972, as Sertularia dalmasi;Defenbaugh 1974, as S. dalmasi;Wenner et al 1984;Rezak et al 1985;Calder 1991aGrohmann et al 2003Grohmann et al , 2011Hajdu & Teixeira 2011), the reported depth range of D. dalmasi is from 8-366 m (Calder & Cairns 2009).…”