Oceanapia hechteli Neto, Nascimento, Cavalcanti & Pinheiro, 2018, nom. nov.
Creators: name: Neto, Carlos Santos
name: Nascimento, Elielton
name: Cavalcanti, Thaynã
name: Pinheiro, Ulisses
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Porifera
Demospongiae
Haplosclerida
Phloeodictyidae
Oceanapia
Oceanapia hechteli

description: Oceanapia hechteli nom. nov.
Figure 2, Table 1
Adocia sp. Hechtel, 1976: p. 240 (Pernambuco State, Brazil).
Rhizochalina nodulosa Hechtel, 1983: p. 65, fig. 5–6 (Pernambuco State, Brazil).
Oceanapia nodulosa; Santos et al. 2002: p. 396 (Pernambuco State, Brazil); Muricy et al. 2011: p. 109.
Not Oceanapia nodulosa (Topsent, 1928) (a valid species).
Material examined: UFPEPOR 3172, off Recife Municipality (08°06’02’’S 34°42’07’’W), Pernambuco State, Brazil, depth 30 m, dredge, st. 129, Recife expedition, 5 April 1967.
Comparative material: YPM 5705 (Holotype), Recife, Pernambuco State, Brazil, depth 27 m, det. Hechtel (1983) (Photographs of the specimen, choanosome and spicules).
External morphology (Fig. 2A). Semispherical sponge, 9.3 x 6.2 cm (length x width). The specimen has nine fistulae, about 0.2–0.6 x 0.2–0.5 cm (length x width), distributed throughout the specimen. The surface is rough and hispid; firm consistency and circular oscules present at the top of the fistulae. Colour when preserved (ethanol 80%) is reddish brown, colour in life is unknown.
Skeleton (Fig. 2B). Ectosoma multilayered compact crust of tangential spicules, with multispicular fiber bundles (69– 83.3 –102 µm, diameter). Cross-linked choanosomal skeleton with multispicular tracts (81– 107.7 –125 µm) forming well-defined circular meshes (125– 383.7 –625 µm).
Spicules (Fig. 2C). Oxeas (174– 210.1 –232 / 6– 6.9 –8 µm): curved, smooth, robust and with telescopic tips. Raphidiform oxeas (97 –162.1– 230 / 2.6 µm): smooth, smaller and thinner.
Distribution and ecology. Endemic from Pernambuco State, Brazil (Hechtel 1976; 1983; Santos et al. 2002; Muricy et al. 2011) (Fig. 1). This specimen was found over calcareous algae.
Etymology. Named after George Hechtel, the authority who designed Rhizochalina nodulosa Hechtel, 1983.
Remarks. Hechtel (1983) described the species from a single specimen, the holotype (YPM 5705), collected in Pernambuco State. We found a topotype specimen (UFPEPOR 3172), described herein. This specimen and the holotype have very similar features; both have a semispherical body with small fragmented fistulae. Their spicule complement of oxeas and its dimensions are similar (see Table 1).
About the homonymy Oceanapia nodulosa, Topsent (1928) described from the Azores a new species, Phloeodictyon nodulosum. Hechtel (1983) described the new species Rhizochalina nodulosa without observing that Van Soest (1980) had already proposed the genus Rhizochalina and Phloeodictyon as synonyms of Oceanapia. According to the International Code of Zoological Name (ICZN 1999: 52.2) the name Oceanapia nodulosa (Hechtel, 1983) should be rejected. Oceanapia hechteli nom. nov. is herein proposed as a replacement for Oceanapia nodulosa (Hechtel, 1983) homonym of Oceanapia nodulosa (Topsent, 1928).
......continued on the next page References: (1) Hechtel (1983); (2) Topsent (1928); (3) Wiedenmayer (1977); (4) De Laubenfels (1934); (5) Lehnert & Van Soest (1999); (6) Campos et al. (2005); (7) Topsent (1904); (8) Schmidt (1870); (9) Van Soest (2017); (10) Lévi (1969); (11) De Weerdt & Van Soest (1986); (12) Topsent (1892); (13) Schmidt (1880); (14) Carter (1882); (15) George & Wilson (1919); (16) Zea (1987); (17) Van Soest & Sass (1981); (18) Bowerbank (1866).
description: Published as part of Neto, Carlos Santos, Nascimento, Elielton, Cavalcanti, Thaynã & Pinheiro, Ulisses, 2018, Taxonomy of Oceanapia Norman, 1869 (Demospongiae: Haplosclerida: Phloeodictyidae) from the Brazilian coast, pp. 363-376 in Zootaxa 4455 (2) on pages 365-366, DOI: 10.11646/zootaxa.4455.2.6, http://zenodo.org/record/1457303