Janicella spinicauda (A. Milne-Edwards, 1883 )

Alves-Júnior, Flavio De Almeida, Silva, Elinai Dos Santos, Araújo, Marina De Sá Leitão Câmara De, Cardoso, Irene, Bertrand, Arnaud & Souza-Filho, Jesser F., 2019, Taxonomy of deep-sea shrimps of the Superfamily Oplophoroidea Dana 1852 (Decapoda: Caridea) from Southwestern Atlantic, Zootaxa 4613 (3), pp. 401-442 : 426-427

Janicella spinicauda (A. Milne-Edwards, 1883)

( Fig. 29 A–C, 30 , 40 E)

Oplophorus spinicauda A. Milne Edwards, 1883 : pl 30.— Chace 1940: 184, fig. 54.— Kensley 1972: 38, fig. 17d–e; 1981a: 58; 1981b: 22. Oplophorus foliaceus Rathbun, 1906: 922 , pl. 20, fig. 8.— de Man 1920: 48. Acathephyra anomala Boone, 1927: 3, fig. 21. Janicella spinicauda— Chace, 1986: 44, figs. 23, 24.— Kensley 1987: 285.— Poupin 1998: 9.— Cardoso & Young 2005: 39, figs.

29–33.— Martin et al. 2005: 217. — Poupin 2018: 102.

Material examined. 1 M and 1 F, Rocas Atoll, Abracos 1 ST# 09/ Leg. 1, Midwater Tow, 105 m, 03° 28,24’ S / 032° 45,56’ W, 0 4 October 2015, MOUFPE: 15.661.

Diagnosis: Carapace with rostrum overreaching scaphocerite, dorsal margin with 10–12 teeth and ventral margin with 6–7 teeth; antennal spine absent; branchiostegal spine not well marked, without distinct carina. Scaphocerite with four teeth on mesial outer margin. Abdomen dorsally carinate on somites 2–4, with strong posteromesial tooth, the one of somite 2 distinctly strong; somites 1 and 2 with pleura ventral margin convexly incised in male. Male pleopod 1, endopod leaf like, densely plumose, articulated setae on lateral margins, several pectinate setae on outer surface, several hook setae on apex; male pleopod 2 without appendix masculina; Telson sulcate in dorsal midline, three pairs of dorsolateral stout setae (modified from Cardoso & Young 2005).

Distribution: Western Atlantic: USA (east coast of Florida), Bermuda, Bahamas, Gulf of Mexico, Caribbean Sea, Honduras, Grenada, Lesser Antilles, Brazil (Rocas Atoll, Pernambuco, Bahia, Espírito Santos and Rio de Ja- neiro). Indo-Pacific Oceans: Mayotte Island, North of Madagascar, Southwestern India, Philippines, Hawaii, French Polynesia ( Chace 1940, 1986; Cardoso & Young 2005; Pequegnat & Wicksten 2006; Judkins 2014) ( Fig. 30 ).

Bathymetric distribution: 200–3716 m ( Chace 1986; Crosnier 1987; Poupin 1998), herein this species was found in Rocas Atoll at 105 m, thus extending its bathymetric distribution from shallow waters.

Remarks: The material examined agrees with Chace (1986) and Cardoso & Young (2005) descriptions. We found a little variation in the number of rostral teeth in some specimens collected from Rocas Atoll (MOUFPE: 15.661, 1 Female (total length = 4.2 cm) and 1 Male (total length = 3.4 cm), which presents the rostrum with 11 teeth in dorsal margin and 7 in ventral margin vs 12 dorsal and 6 ventral teeth as analyzed by Chace (1986) and Cardoso & Young (2005). The genus Janicella is monotypic and occurring in the Indian, Pacific and Atlantic Oceans ( Fig. 30 ), in mesopelagic zones ( Cardoso & Young 2005). The first record in Southwest Atlantic (Brazilian waters) was made by Cardoso & Young (2005) based on material collected from Bahia, Espírito Santo and Rio de Janeiro under the framework of project REVIZEE. The present study fills some gaps on the geographic distribution of this species in Northeastern Brazil. Moreover, it represents the first report of J. spinicauda from an oceanic island in the Southwestern Atlantic.

Figures

FIGURE 29. Janicella spinicauda (A. Milne-Edwards, 1883).A. Male, lateral view. B.Telson, dorsal view. (MOUFPE: 15.661). Scale bar = 0.1 cm.

FIGURE 30. Global geographic distribution of Janicella spinicauda (A. Milne-Edwards, 1883). Black circles = previous records; star = new record.

FIGURE 40. Deep-sea shrimps of the families Acanthephyridae Spence Bate, 1888 and Oplophoridae Dana, 1852 being: A. Ephyrina ombango Crosnier & Forest, 1973 (MOUFPE: 18.399). B. Meningodora compsa (Chace, 1940) (MOUFPE: 18.354). C. Notostomus elegans A. Milne-Edwards, 1881 (MOUFPE: 18.401). D. Notostomus gibbosus A. Milne-Edwards, 1881 (MOUFPE: 18.447). E. Janicella spinicauda (A. Milne-Edwards, 1883) (MOUFPE: 15.661). F. Oplophorus gracilirostris A. Milne-Edwards, 1881 (MOUFPE: 15.673), with material collected in Northwestern Brazil.