Grapsidae MacLeay, 1838

Alves, Maria De Lourdes, Ramos-Porto, Marilena & Viana, Girlene Fábia Segundo, 2008, Checklist of the Decapods (Crustacea) from the Fernando de Noronha Archipelago, Brazil, Zootaxa 1881, pp. 43-68 : 64-65

Family Grapsidae MacLeay, 1838

Geograpsus lividus (H. Milne Edwards, 1837)

Diagnosis: Melo, 1996:448

Previous record: Rathbun, 1918:232.

Examined material: JAN/92: Praia da Atalaia, 1 male. MAR/92: Praia do Leão, 1 male, 1 female. AUG/ 92: Praia do Porto, 1 male.

Habitat: Between rocky blocks; under rock, in bottom sand-muddy.

Goniopsis cruentata (Latreille, 1803)

Diagnosis: Melo, 1996:449.

Previous records: Rathbun, 1918:237; Melo, 1996:449, 1998:498.

Examined material: JUN/92: Baía do Sueste, 2 males, 3 females. AUG/92: Baía do Sueste, 35 specimens. AUG/93: Baía do Sueste, 1 male, 1 female (ovigerous).

Habitat: In mangrove, the root or trunk of the trees, in slimy bottom.

Observations: Rarely observed during the day; collected always at night.

Grapsus grapsus (Linnaeus, 1758)

Diagnosis: Melo, 1996:450.

Previous records: Pocock, 1890:512 [as Grapsus maculatus (Catesby, 1771) ]; Moreira, 1901:39; Rathbun, 1918:227; Coelho, 1967 /69: 235; Coelho and Ramos, 1972:201; Fausto Filho, 1974:14; Melo, 1996: 450, 1998:499; Coelho et al., 2002:445.

Examined material: NOV/91: Praia da Atalaia, 2 males; Praia do Leão, 1 male, 1 female; Praia da Caieira, 5 specimens. MAR/92: Baía do Sueste, 6 specimens; Praia do Boldró: 15 specimens. JUN/92: Praia da Conceição, 1 female; Praia do Cachorro, 5 specimens. SEP/92: Praia do Leão, 3 specimens. DEC/92: Praia do Meio, 6 specimens. JAN/93: Praia da Atalaia, 9 specimens. MAR/93: Enseada do Abreu, 1 male. AUG/93: Praia do Porto, 5 specimens; Praia da Caieira, 7 specimens. JAN/2000: Baía do Sueste, Praia da Atalaia, Praia Cacimba do Padre, Baía do Sancho and Praia do Leão: several specimens observed, not collected.

Habitat: On rocks, in seaweed, and in reefs environments.

Observations: Observed in all the studied areas; common in the majority of beaches, juveniles as well as adults.

Pachygrapsus transversus (Gibbes, 1850)

Diagnosis: Melo, 1996:454.

Previous records: Fausto Filho, 1974:13; Williams: 1984:459. Examined material: DEC/92: Praia do Porto, 1 male, 1 female; Praia do Leão, 2 males. JAN/92: Praia da Atalaia, 1 male, 5 females; Praia do Cachorro, 2 females. MAR/92: Praia do Boldró, 2 males, 1 female; Baía do Sueste, 1 male, 1 female (ovigerous). JUN/92: Praia do Leão, 2 males. AUG/92: Praia da Caieira, 1 male. DEC/92: Praia da Conceição, 2 males, 1 female. MAR/93: Praia do Leão, 1 male. AUG/93: Praia da Atalaia, 1 male, 1 female; Praia da Caieira, 3 males, 1 female (ovigerous). Jan/2000: Baía do Sueste: 1 specimen; Praia da Caieira: 1 specimen observed, not collected.

Habitat: On seaweed; under and inside of rocky blocks; between mussels; in bottom sand-muddy. Observed in the more eroded parts of reefs.