Aristeus antennatus ( Risso, 1816 )

Tavares, Carolina R. & Serejo, Cristiana S., 2007, Taxonomy of Aristeidae (Dendrobranchiata: Penaeoidea) from the central coast of Brazil, collected by the Revizee program, between 19 º and 22 ºS, Zootaxa 1585, pp. 1-44 : 14-19

Aristeus antennatus ( Risso, 1816)

( Figs. 8–10 )

Peneus antennatus Risso, 1816: 95 , pl. u, fig. 6.

Aristeus antennatus - Duvernoy, 1841:101–108, pl. IV–V; Bate, 1881: 188; Bouvier, 1908: 71 –75, pl. XI–XII; Crosnier & Forest, 1973: 288, 290, 291, 294, 353, 362; Crosnier, 1978: 71 –74; Pérez Farfante & Kensley, 1997: 39 –40.

Type locality: Mediterranean sea, off Nice.

Material examined: St. E0496, 13º17.580' S – 38º17.599' W to 13º12.030' S – 38º14.873' W, 1717 m, 07/ VI/2000, 3 females, cl: 50.2–55.9 mm, 3 males, cl: 45.8–60.9 mm, MNRJ 14532. St. E0526, 20º06.565' S – 38º40.502' W to 20º03.984''S – 38º36.676''W, 1637 m, 28/VI/2000, 3 females, cl: 39.6–59.7 mm, 3 males, cl: 49.4–53.0 mm, MNRJ 14534. St. E0527, 19º50.736' S – 39º10.817' W, to 19º50.563'S – 39º14.496'W, 1402 m, 29/VI/2000, 1 female, cl: 66.7 mm, MNRJ 14557. St. E0537, 20º26.850' S – 39º41.636' W to 20º23.542' S – 39º48.698' W, 1642 m, 08/VII/2000, 3 females, cl: 45.4–56.5 mm, MNRJ 14531. St. E0548, 21º28.611' S – 39º40.303' W, 1799 m, 07/VII/2000, 1 male, cl: 62.0 mm, MNRJ 14529. St. E0549, 21º25.738' S – 39º43.946' W to 21º22.965' S – 39º44.646' W, 1718 m, 07/VII/2000, 2 females, cl: 57.0– 61.5 mm, 2 males, cl: 51.3–61.9 mm, MNRJ 14550. St. E0552, 21º07.493' S –39º46. 423' W to 21º09.541' S – 39º46.079' W, 1694 m, 1 male, cl: 50.5 mm MNRJ 14530.

Diagnosis: Rostrum curved upward on proximal region and curved downward on distal region, with 3 big proximal teeth, ventral margin with some simple setae. Cervical carina absent; hepatic sulcus present. Abdominal somites 3–6 with dorsal spines, the first one the largest and the last one extremely reduced. Thelycum with a semioval plate on sternite XII and with a spine on sternite XIII. Male sternum with a semioval plate on sternite XII. Petasma with ventral costa smaller than lateral lobe, curved outward, with extremity enlarged, not forming a hook; median lobe smaller than lateral lobe. Appendix interna semioval with cuspidate setae on distal extremity. Appendix masculina filiform, smaller and thinner than appendix interna, with marginal simple setae.

Description: Rostrum curved upward on proximal region and curved downward on distal region, with 3 big proximal teeth; some simple setae on ventral region of rostrum and in front of rostrum spines ( Fig. 8 a). Adrostral carina well defined; cervical carina absent; branchiocardiac, branchiostegal, gastro-orbital and submarginal carina present; hepatic sulcus present; antennal and branchiostegal spines present ( Fig. 8 a).

Abdominal somites 1–3 with a depression that extends from the dorsum to half of pleurae; pleurae with marginal setae; tergum with medial carina on somites 3–6; abdominal somites 3–6 with dorsal spines, the first is the largest and the last extremely reduced ( Fig. 8 a).

Antennal scaphocerite approximately 1, 6 X of antennular peduncle ( Fig. 3 a–c).

Right and left mandibles with incisor and molar processes distinct; palp present ( Fig. 8 d, 8e).

Maxillae, maxillipeds as for the family ( Figs. 8 f–g, 9a–c).

First pereopod dactyl approximately 1.5 X of palm; palm with setae tufts on proximo-ventral region; carpus approximately 1.5 X of dactyl; merus approximately 1.5 X of carpus, with one disto-lateral cuspidate setae ( Fig. 9 d).

Second pereopod dactyl approximately 1.3 X of palm; carpus approximately 2 X of dactyl; merus approximately 1.2 X of carpus, with a disto-lateral cuspidate setae ( Fig. 9 e).

Third pereopod dactyl approximately 1.3 X of palm; carpus approximately 2.6 X of dactyl and of the same size of merus; male coxa with a small inner spine ( Fig. 9 f).

Fourth pereopod dactyl approximately 0.5 X of propodus; propodus approximately 0.6 X of carpus; carpus approximately 0.8 X of merus; male coxa with a small inner spine ( Fig. 9 g).

Fifth pereopod 5, dactyl approximately 0.5 X of propodus; propodus approximately 0.5 X of carpus; carpus approximately 0.8 X of merus; male coxa with an inner spine ( Fig. 9 h).

Females with sternites IX–XI with ventral spines; sternite XII with an oval plate ending in a spine; sternite XIII with a ventral spine ( Fig. 10 a). Males with sternite XI with a ventral carina; sternite XII with an oval plate ending in a spine ( Fig. 10 b).

Petasma with ventral costa smaller than lateral lobe, curved outward, with extremity enlarged, not forming a hook; median lobe smaller than lateral lobe ( Fig. 10 c–d). Appendix masculina semioval with cuspidate setae on distal extremity ( Fig. 10 e). Appendix interna filiform, smaller and thinner than appendix masculina, with marginal simple setae ( Fig. 10 f).

Variation: One male (MNRJ 14532) has one disto-lateral cuspidate setae on merus of third pereopod besides those on first and second pereopods.

Distribution: Indian Ocean: Mozambique; Zanzibar; Madagascar; Réunion; Maldive Islands. Eastern Atlantic Ocean: from Portugal to Cape Verde Islands and Azores; Mediterranean; Natal; South Africa ( Pérez Farfante & Kensley, 1997).

Depth: 150 m – 1440 m. ( Pérez Farfante & Kensley, 1997)

New records: Western Atlantic Ocean—Brazil, from Bahia to Espirito Santo states, between 1402 m and 1799 m.

Figures

FIGURE 3. Aristaeomorpha foliacea (Risso, 1827). Male, cl: 39.6 mm, MNRJ 14560, a) Left maxilliped 1; b) Left maxilliped 2; c) Left maxilliped 3; d) Left pereopod 1; e) Left pereopod 2; f) Left pereopod 3; g) Left pereopod 4; h) Left pereopod 5; i) Branchiae position, lateral view (numbers showing the fourth and the thirteenth segments).

FIGURE 8. Aristeus antennatus (Risso, 1816). Male, cl: 53.0 mm, MNRJ 14534, a) Habitus; b) Right antenna 1; c) Right antenna 2; d) Right mandible; e) Left mandible; f) Right maxilla 1; g) Right maxilla 2.

FIGURE 9. Aristeus antennatus (Risso, 1816). Male, cl: 53.0 mm, MNRJ 14534, a) Right maxilliped 1; b) Right maxilliped 2; c) Right maxilliped 3; d) Right pereopod 1; e) Right pereopod 2; f) Right pereopod 3; g) Right pereopod 4; h) Right pereopod 5; i) Branchiae position, lateral view (numbers showing the fourth and the thirteenth segments).

FIGURE 10. Aristeus antennatus (Risso, 1816). Female, cl: 39.6 mm, MNRJ 14534, a) Sternum (numbers showing the eleventh and thirteenth sternites). Male, cl: 53.0 mm, MNRJ 14534, b) Sternum (numbers showing the eleventh and thirteenth sternites); c) Left petasma, anterior; d) Left petasma, posterior; e) Left appendix interna; f) Left appendix interna and appendix masculina; g) Right uropod; h) Telson.