Cymothoa oestrum ( Linnaeus, 1758 ), 2999

Ribeiro, Felipe Bezerra, Huber, Augusto Frederico & Araujo, Paula Beatriz, 2021, Redescription of the fish-parasitic isopod Cymothoa ianuarii Schioedte & Meinert, 1884 and further records of C. excisa Perty, 1833 and C. oestrum (Linnaeus, 1758) (Isopoda: Cymothoida: Cymothoidae) from Brazil, Papéis Avulsos de Zoologia 61, pp. 1-10 : 7-9

Cymothoa oestrum ( Linnaeus, 1758) ( Figs. 5-6 ; Table 1)

Oniscus oestrum Linnaeus, 1758: 636 .

Asellus oestrum Olivier, 1789: 253 .

Cymothoa oestrum Fabricius, 1793: 505 . Thatcher et al., 2003: 546, figs. 52-76. Luque et al., 2013: 1454.

Material examined: BRAZIL: Bahia: one ovigerous female, Candeias, coll. J. Pezzi da Silva, 11/ V /2010 ( MCP 2999) [illustrated].

Remarks: This is the first record of this species from Bahia, particularly in the northern portion (12°44′49″S, 38°29′38″W), and it is the second record from Brazil. This species was redescribed by Thatcher et al. (2003) based on material from Camboriú, state of Santa Catarina, southern Brazil. Females can be distinguished by the truncate cephalon deeply immersed in the pereonite 1, eyes absent, anterolateral margins of pereonite 1 blunt and bilaminate pleopods with folding on the fifth endopod ( Fig. 5 ). Males are unknown ( Thatcher et al., 2003).

Hosts: The host of the present specimen is unknown. However, C. ianuarii was already found parasitizing fishes of the families Carangidae and Priacanthidae ( Trilles, 1994) .

Distribution: United States of America (Massachusetts to Florida), Antilles, Venezuela and Brazil (Bahia and Santa Catarina) ( Fig. 6 ) ( Thatcher et al., 2003).

Figures

Figure 5. Cymothoa oestrum (Linnaeus, 1758) (MCP 2999): (A) habitus dorsal view; (B) habitus ventral view; (C) habitus lateral view; (D) cephalon frontal view. Scale bar:A-C = 5 mm;D = 2.5 mm.

Figure 6. Map with the records of Cymothoa excisa (▲), C. ianuarii (⬛) and C.oestrum (⬤) in Brazil.Symbols in dark gray indicate literature records and white indicatesnewrecords.Abbreviations:PA =Pará;MA = Maranhão;PE= Pernambuco;SE = Sergipe;BA = Bahia;RJ = Rio de Janeiro;SP = São Paulo; SC = Santa Catarina.