Rimapenaeus constrictus ( Stimpson, 1874 )

Cardoso, Irene & Terossi, Mariana, 2022, Molecular analyses reveal two lineages under the name Rimapenaeus constrictus (Stimpson, 1874) (Decapoda, Dendrobranchiata, Penaeidae), Zootaxa 5150 (2), pp. 282-292 : 284-286

publication ID

https://doi.org/ 10.11646/zootaxa.5150.2.7

publication LSID

lsid:zoobank.org:pub:9FEE7266-E04B-4D5B-BF2C-2EE1E5644FDA

DOI

https://doi.org/10.5281/zenodo.6628497

persistent identifier

https://treatment.plazi.org/id/44165528-6A2F-557D-FF67-64139DC5FC5F

treatment provided by

Plazi

scientific name

Rimapenaeus constrictus ( Stimpson, 1874 )
status

 

Rimapenaeus constrictus ( Stimpson, 1874) View in CoL

Penaeus constrictus Stimpson 1874: 135 View in CoL .

Trachypeneus constrictus — Hay & Shore 1918: 378, pl. 25, fig. 9; Schmitt 1935: 131; Williams 1965: 31, fig. 21.

Trachypenaeus constrictus View in CoL —A. Milne Edwards & Bouvier 1909: 232, figs. 60–63; pl. 5, figs. 7–10; pl. 6, figs. 1, 2; Chace 1972: 9; Huff & Cobb 1979: 43 (complete synonymy), fig. 26; Perez Farfante 1988: 17 (Key), figs. 26–27, A-C, D; Williams 1984: 38, figs. 20, 21.

Material examined. USA, Florida: UF 3725 , Key Largo , 1 female, CL 16.7mm; UF 28522 , off Jacksonville , 1 juvenile (genetic voucher), CL 7.1mm; UF 28511 , off Jacksonville , 1 male (genetic voucher), CL 10.5mm; UF 28509 , off Jacksonville , 1 female (with spermatophore plug), CL 18.5mm; UF 28510 , off Jacksonville , 1 female (with spermatophore plug), CL 19.1mm. Brazil , Rio de Janeiro (RJ) and São Paulo (SP): MNRJ 25229 View Materials , Baía de Guanabara , Rio de Janeiro, RJ, 3 females (genetic vouchers), CL 14.2–15.1mm; MNRJ 30198 View Materials , Baía de Guanabara , Rio de Janeiro, RJ, 8 females (genetic voucher), CL 10.1–13.5mm; MNRJ 30199 View Materials , Enseada de Ubatuba , Ubatuba, SP, 26 females (11 with spermatophore plug), CL 13.3–21.9mm; DZ/ UFRGS 6929 View Materials , Enseada de Ubatuba , Ubatuba, SP, 13 females (genetic voucher) (9 with spermatophore plug), CL 10.5–18.5mm and 2 males, CL 12.3–14.4mm .

Diagnosis. Rostrum with usually 7 to 9 teeth along entire dorsal margin, without teeth on ventral margin; carapace with two longitudinal sutures; with almost entire dorsal region and anterior part of sides densely setose; branchial region sparsely setose ( Figs. 2A View FIGURE 2 , 4A View FIGURE 4 ). Abdomen naked except for bands of setae flanking dorsal keel of last 2 or 3 segments. Males with protuberance on sternite 13–14 goblet-shaped, constricted posteriorly. Petasma with inner lamellae soldered together and folded, diverging at the tip, forming two hard, lunate processes with distolateral corners greatly produced as hornlike projections; with two strong hook setae at lamellae divergence point ( Figs. 2C View FIGURE 2 , 4C View FIGURE 4 ). Appendix masculina (pleopod 2) subquadrate with rows of small stout setae at distal margin ( Figs. 3B View FIGURE 3 , 5C View FIGURE 5 ). Thelycum anterior margin of plates of sternite 14 strongly convex, evenly rounded, notched in middle; anterior margin of median protuberance on sternite 13 convex or subangulate ( Figs. 4B View FIGURE 4 , 5F View FIGURE 5 ). Exopods of fifth pair of pereopods long, reaching, or almost reaching level of distomesial extremity of basis and telson with 2 rounded carinae, tapering to short acuminate tip, armed on either side with one stout seta ( Figs. 3C, D View FIGURE 3 and 5E, G View FIGURE 5 ).

Remarks. All diagnostic features of R. constrictus , including that mentioned in Pérez Farfante (1988) key, were analyzed in all examined specimens from both lineages. Small distinctions were observed in some specimens, but none clear pattern that allows the morphological separation of the two lineages found in molecular data was observed. At the present level of morphological observation, these distinctions from specific diagnosis were considered intraspecific variations once that they were observed also between specimens from the same locality. The main intraspecific variation observed was in protuberance on sternite 13–14 of males that according to Perez Farfante (1988) is goblet-shaped, constricted posteriorly. The same was observed herein in some Ubatuba (São Paulo) specimens ( Fig. 5A View FIGURE 5 ) but in Florida and other Ubatuba (São Paulo) specimens it is almost rounded, not acute anteriorly and not constricted posteriorly ( Figs. 3A View FIGURE 3 , 5B View FIGURE 5 ). The appendix masculina (pleopod 2) was not described previously to this species, but none variation was observed between the examined material. At the thelycum, the middle notch on plates of sternite 14 is wider in specimens with the spermatophore plug inserted ( Figs. 2B View FIGURE 2 , 5D View FIGURE 5 ).

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Decapoda

Family

Penaeidae

Genus

Rimapenaeus

Loc

Rimapenaeus constrictus ( Stimpson, 1874 )

Cardoso, Irene & Terossi, Mariana 2022
2022
Loc

Penaeus constrictus

Stimpson, W. 1874: 135
1874
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