52 Isarachnanthus maderensis (Johnson, 1861)

Saccanthus maderensis Johnson, 1861: 305-306; Andres 1883: 346

Cerianthus maderensis: Pax 1908: 262-263;

In part Cerianthus membranaceus Pax 1908: 464-465, 497-498

Arachnanthus nocturnus: Ocaña et al. 2000b: 107; Wirtz et al. 2003: 114-116

Isarachnanthus cruzi Brito, 1986: 174-181

? Cerianthus sp. Torelli 1963: 714-715

Isarachnanthus maderensis: Molodtsova 2003: 249-253; Stampar et al. 2012: 1-9; Stampar and Morandini 2017: 689-693

Type locality.

Madeira Island, Portugal.

Distribution.

Madeira Island (Portugal), Ascension Island, Rocas Atoll (Brazil), Caribbean Sea, (?) Mediterranean Sea; at 2-30 m depth.

Remarks.

This species was described by Johnson (1861) from Madeira Island. However, the first detailed morphological characterization was presented by Brito (1986) (as I. cruzi). The delimitation of this species is quite complicated, as according to Stampar et al. (2012) only molecular data or morphometric data of the cnidome can be used to compare to other species of the genus. The distribution of this species is quite wide, from oceanic islands of the South Atlantic to the Caribbean Sea and the Mediterranean Sea (Stampar and Morandini 2017).

Type material.

Not found in this study.