Ascorhynchus corderoi du Bois-Reymond Marcus, 1952

Lucena, Ruda Amorim & Lindsey Christoffersen, Martin, 2022, Pycnogonida (Arthropoda) from Museu de Ciencias Naturais, Rio Grande do Sul, Brazil, Zoosystematics and Evolution 98 (2), pp. 305-312 : 305

Ascorhynchus corderoi du Bois-Reymond Marcus, 1952

Fig. 2

Material examined.

(FZB.Pyc-001) 31 specimens, Fernando de Noronha , Pernambuco, Brazil, Dec 21, 1978; (FZB.Pyc-007) 5 specimens, Perequê, Nov 2, 1972.

Distribution.

Brazil: São Paulo and Paraíba ( Lucena and Christoffersen 2018a; Lucena et al. 2019a). Seychelles (Aldabra Atoll), Mauritius, Oman and Tonga ( Child 1998a; Bamber 2004).

Depth.

Shallow waters.

Remarks.

The species is recorded herein for the first time for the Archipelago of Fernando de Noronha, expanding its known distribution in north-eastern Brazil. All 31 specimens obtained from Fernando de Noronha were found associated with the epibiont hydrozoan Clytia ? Lamouroux, 1812 (FZB.Pyc-001).

The hydrozoans occurred on both the dorsal and ventral surfaces of the trunk (mainly near the dorsal tubercles and the lateral processes), on eggs and ovigers and more densely on the legs (Fig. 2 ). Besides occurring on the proximal articles, as observed by Pipe (1982), we also found them mainly on the distal articles, such as the tibia 2 and even on the propodus. Visual differences in epibiont density were not noted amongst ovigerous and non-ovigerous individuals.

Colossendeidae Jarzynsky, 1870

Colossendeis Jarzynsky, 1870

Figures

Figure 2. Ascorhynchus corderoi (FZB. Pyc- 001). A. Dorsal view; B. Lateral view; C. Distal articles of 3 rd leg; D. Tibia 2, tarsus and propodus.