Janaira gracilis Moreira and Pires, 1977

Fernandes, Cristiana S. Serejo Agatha C. S., 2025, Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil, Nauplius (e 20250535) 33, pp. 1-39 : 10-11

Janaira gracilis Moreira and Pires, 1977

( Fig. 4B )

Janaira gracilis Moreira and Pires, 1977: 25 , figs. 1–19. — Pires, 1995: 305. — Pires-Vanin, 1998: 607.

Type material. Holotype: male, 2.6 mm, IOUSP . Paratypes, 8 males, 8 females, IOUSP ; 3 males and 3 females deposited in the Zoological Museum , University of Copenhagen, Denmark .

Topotype material: 23 specimens, Lamberto Beach (23°29’45.8”S 45°06’41.5”W), Ubatuba, SP , Brazil, AM Pires col. January , 1972, MNRJ 6276 .

Type locality. Lamberto Beach (23°29’45.8”S 45°06’41.5”W), Ubatuba, SP , Brazil. Shallow sublittoral, 0.5–1 m depth, in large growth of the algae Sargassum cymosum C.Agardh alongside the pier of the North Base, Instituto Oceanográfico, USP.

Geographic distribution. Caribbean Sea ( Colombia); Brazil (PE, SP) ( Moreira and Pires, 1977; Pires-Vanin, 1998; Craveiro and Alves, 2021).

Habitat. Found in shallow water on sandy bottoms, among algae, and on the sea star Echinaster brasiliensis Müller and Troschel, 1842 ( Pires, 1995; Pires-Vanin, 1998).

Current systematic position. Janaira gracilis Moreira and Pires, 1977 .

Remarks. The material of J. gracilis deposited at Museu Nacional as voucher number MNRJ 6276 is actually a topotype. It came from the same collection event as the holotype in Lamberto Beach, Ubatuba, SP , collected by Pires in January 1972. At some point in the past, Pires sent this material to be deposited at the MNRJ as a paratype; unfortunately, she did not include this information within the article ( Moreira and Pires, 1977), so this material remains a topotype.

Figures

Figure 4.Carpias nereus (Pires,1982): A, paratype, male,2.5 mm, MNRJ 6277.Janaira gracilis Moreira and Pires, 1977:B, paratype, male, 2.8 mm, MNRJ 6276.