Plesiopenaeus armatus ( Bate, 1881 )

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 : 33-37

publication ID

https://doi.org/ 10.5281/zenodo.178428

publication LSID

lsid:zoobank.org:pub:EE878C54-779E-4FE9-9B64-9274A691B4DE

DOI

https://doi.org/10.5281/zenodo.3504031

persistent identifier

https://treatment.plazi.org/id/03A6817C-7405-8A40-A1EF-FA60FB67A6EF

treatment provided by

Plazi

scientific name

Plesiopenaeus armatus ( Bate, 1881 )
status

 

Plesiopenaeus armatus ( Bate, 1881)  

( Figs. 20–22 View FIGURE 20 View FIGURE 21 View FIGURE 22 )

Aristaeus armatus Bate, 1881: 188   ; 1888: 312–317, pl. 45–46, figs. 1–2.

Aristaeus (Aristaeopsis) armatus   - Alcock, 1901: 41.

Plesiopenaeus armatus   - Crosnier & Forest, 1973: 294 –296, fig. 99, c–d; Crosnier, 1978: 92 –94, figs. 31 d-e, 32 d–f, 33 b; Pérez Farfante & Kensley, 1997: 50 –52, figs. 19–20; Dall, 2001: 421 –422, fig. 9.

Type locality: Not determined.

Material examined: St.E0520, 13 º 21.837 ' S – 38 º 16.683 ' W to 13 º 26.455 ' S – 38 º 13.836 ' W, 2137 m, 20 / VI/2000, 1 female, cl: 38.6 mm, 1 male, cl: 54.6 mm, MNRJ 14576. St. E0525, 20 º08.145' S – 38 º 38.081 ' W to 20 º07.308' S – 38 º 42.906 ' W, 1639 m, 28 /VI/2000, 1 male, cl: 54.1mm, MNRJ 19523. St. E0548, 21 º 28,611 ’S – 39 º 40,303 ’W to 21 º 25,523 ’S – 39 º 40,443 ’W, 1799 m, 1 juvenile male, cl: 22 ,0 mm, MNRJ 14510. St. E0552, 21 º07.493' S – 39 º 46.423 ' W to 21 º09.541' S – 39 º 46.079 ' W, 1694 m, 08/VII/2000, 1 male, cl: 58.2 mm, MNRJ 19519.

Diagnosis: Rostrum sligthly curved upward, with 3 dorsal spines. Cervical carina reaches the middle of carapace. Females with a semioval plate on sternite XII, sternites XI and XIII each with a median carina. Males with a small triangular plate on sternite XII, sternite XI with a median carina, and sternite XIII with a median carina ending in a spine. Abdominal pleurae with small terminal spines. Abdominal somites 3–6 with a median dorsal carina, and with dorsal spines. Petasma with ventral costa approximately of the same size of lateral lobe, with distal extremity curved, but not forming a hook; lateral lobe almost reaches median lobe. Appendix interna semioval with marginal cuspidate setae and with simple setae on base. Appendix masculina of the same length and thinner than appendix interna, with cuspidate setae on inner margin.

Description: Rostrum slightly curved upward, with 3 dorsal spines, with some simple setae on ventral region of rostrum and in front of rostrum spines ( Fig. 20 View FIGURE 20 a). Adrostral and branchiocardiac carina well defined; cervical carina reaches the middle of carapace; antennal, antero-lateral, branchiostegal and gastro-orbital carina present; hepatic carina absent; antennal and branchiostegal spines present ( Fig. 20 View FIGURE 20 a).

Abdominal somites 1–2 with a depression that extends from dorsum to the middle of pleurae; pleurae with marginal setae and small terminal spines; abdominal somites 3–6 with a median dorsal carina, and with dorsal spines ( Fig. 20 View FIGURE 20 a).

Antennal scaphocerite approximately 1.3 X of antennular peduncle ( Fig. 20 View FIGURE 20 a–c).

Right and left mandibles with incisor and molar processes distinct; palp present ( Fig. 20 View FIGURE 20 d, 20 e).

Maxillae, maxillipeds as for the family ( Figs. 20 View FIGURE 20 f-g, 21 a-c).

First pereopod dactyl approximately 1.6 X of palm; carpus approximately 1.4 X of dactyl; merus approximately 1.5 X of carpus, with a disto-lateral cuspidate setae ( Fig. 21 View FIGURE 21 d).

Second pereopod dactyl approximately 1.5 X of palm; carpus approximately 2 X of dactyl; merus approximately 1.2 X of carpus, with a disto-lateral cuspidate setae ( Fig. 21 View FIGURE 21 e).

Third pereopod dactyl approximately 1.5 X of palm; carpus approximately 2.5 X of dactyl, and of the same size of merus; males with a small spine on coxa ( Fig. 21 View FIGURE 21 f).

Fourth pereopod dactyl approximately 0.5 X of propodus; propodus approximately 0.6 X of carpus; merus approximately 1.4 X of carpus; males with a small spine on coxa ( Fig. 21 View FIGURE 21 g).

Fifth pereopod dactyl approximately 0.5 X of propodus; propodus approximately 0.6 X of carpus; merus approximately 1.4 X of carpus; males with a spine on coxa ( Fig. 21 View FIGURE 21 h).

Females with a semioval plate on sternite XII, sternites XI and XIII each with a median carina ( Fig. 22 View FIGURE 22 a). Males with a small triangular plate on sternite XII, sternite XI with a median carina, and sternite XIII with a median carina ending in a spine ( Fig. 22 View FIGURE 22 b).

Petasma with ventral costa approximately of the same size of ventro-lateral lobe, with distal extremity curved, but not forming a hook; lateral lobe almost reaches median lobe ( Fig. 22 View FIGURE 22 c–d). Appendix masculina semioval with marginal cuspidate setae and with simple setae on base ( Fig. 22 View FIGURE 22 e–f). Appendix interna of the same length and thinner than appendix masculina, with cuspidate setae on inner margin ( Fig. 22 View FIGURE 22 e)

Juvenile male: One juvenile male (cc: 22 ,0 mm, MNRJ 14510) was found among specimens examined herein. Being a juvenile specimen, its sexual characters are poorly defined, although it is possible to affirm that it is a male for the presence of appendix masculina. Despite sexual characters are very important to separate species of Aristeidae   , others characters as carapace and abdominal spines, presence of rudimentary exopods on pereopods, and presence of disto-lateral cuspidate setae on first and second pereopods, were used to affirm that this specimen is P. a r m a t u s.

Distribution: Indian Ocean: Zanzibar; Madagascar; Maldive Islands; Bay of Bengal. Pacific Ocean: Philippines; Japan; Tuamotu Islands; Wallis and Futuna Islands; northeast of Australia; Hawaii. Eastern Atlantic Ocean: off Azores; Madeira; Canary Islands; Cape Verde. Western Atlantic Ocean: Gulf of Mexico ( Pérez Farfante & Kensley, 1997; Dall, 2001).

Depth: 752–5413 m. ( Pérez Farfante & Kensley, 1997; Dall, 2001)

New records: Brazil—from Bahia to Espírito Santo states, between 1639 e 2137 m.

MNRJ

Museu Nacional/Universidade Federal de Rio de Janeiro

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Decapoda

Family

Aristeidae

Genus

Plesiopenaeus

Loc

Plesiopenaeus armatus ( Bate, 1881 )

Tavares, Carolina R. & Serejo, Cristiana S. 2007
2007
Loc

Plesiopenaeus armatus

Dall 2001: 421
Perez 1997: 50
Crosnier 1978: 92
Crosnier 1973: 294
1973
Loc

Aristaeus (Aristaeopsis) armatus

Alcock 1901: 41
1901
Loc

Aristaeus armatus

Bate 1881: 188
1881