Lysmata lipkei Okuno & Fiedler, 2010

Pachelle, Paulo P. G., Carvalho, Leina, Alves, Douglas F. R. & Anker, Arthur, 2020, A revision of the Brazilian species of Lysmata Risso, 1816 (Decapoda: Caridea Lysmatidae), with discussion of the morphological characters used in their identification, Zootaxa 4789 (1), pp. 55-90 : 71

Lysmata lipkei Okuno & Fiedler, 2010

( Figure 11 )

Lysmata lipkei Okuno & Fiedler 2010: 599 , figs. 1–4; Pachelle et al. 2016: 17 , figs. 10–12; Alves et al. 2018: 44 : figs. 1A, 2.

Material examined. 1 non-ov. specimen (pocl 4.0 mm), MZUSP 29791 , Brazil, Ceará, Camocim, Praia do Farol do Trapiá , 02º51’43’’S 40º51’33’’W, rocky intertidal, coll. P.P.G. Pachelle and C.B. Mendes, 08.iv.2012 ; 4 non-ov. specimens (pocl 5.6– 2.9 mm), 1 ov. specimen (pocl 4.8 mm), MZUSP 33744 , Brazil, Ceará, Icapuí, Praia de Ponta Grossa , rocky intertidal, coll. C.B. Mendes, 09.ix.2014 ; 1 non-ov. specimen (pocl 5.6 mm), MZUSP 29788 , Brazil, Rio Grande do Norte, Praia de Baixa Grande , 04º55’45’’S 37º05’06’’W, rocky intertidal, coll. P.P.G. Pachelle, 23.vii.2013 ; 1 ov. specimen (pocl 6.1 mm), MZUSP 29789 , same collection data as for previous specimen ; 1 nonov. specimen (pocl 4.9 mm), MZUSP 29790 , same collection data as for previous specimen ; 1 non-ov. specimen (pocl 5.5 mm), MZUSP 37415 , Brazil, Sergipe, Aracaju, Orla do Mosqueteiro , coll. D.F. R. Alves, 18.v.2017 ; 2 non-ov. specimens (pocl 4.0, 3.0 mm), MZUSP 37417 , same collection data as for previous specimen, 10.x.2016 ; 1 non-ov. specimen (pocl 4.0 mm), MZUSP 37513 , same collection data as for previous specimen, i.2017 ; 5 non-ov. specimens (pocl 5.0– 3.5 mm), MZUSP 37416 , Brazil, Sergipe, Aracaju, Orla do Sol , coll. D.F. R. Alves, 18.v.2017 ; 1 specimen (pocl 5.0 mm), MZUSP 39102 , Brazil, Bahia, exact locality unknown, collector unknown, purchased from aquarium shop in São Paulo, x.2018 ; 1 non-ov. specimen (pocl 9.0 mm), MZUSP 39099 , same collection data as for previous specimens .

First record for Brazil. Ceará and Rio Grande do Norte ( Pachelle et al. 2016) .

Distribution. Indo-West Pacific: Japan (Ryukyu Islands) and Singapore ( Anker & De Grave 2016). Western Atlantic: Brazil (Ceará, Rio Grande do Norte, Sergipe and Bahia) ( De Grave et al. 2012; Pachelle et al. 2016; Alves et al. 2018; present study) ( Fig. 16 ).

Remarks. In Brazil, preserved specimens of L. lipkei can be confused with L. vittata , another invasive species of Lysmata in the country, due to the overall similar morphology. However, L. lipkei can be recognised by the relatively long stylocerite, reaching or almost reaching to the level of the row of spiniform setae on the distal margin of the first article of the antennular peduncle, the number of subdivisions in the second pereopod carpus and merus, and the shape of the infraorbital process of the carapace ( Figs. 11 A–C, 15A–C; Laubenheimer & Rhyne 2010: fig. 1A, D, 2F; Pachelle et al. 2016: fig. 10A–B, J–K). In life, L. lipkei differs from L. vittata by several features of the colour pattern, including the shape of the dorsal stripes on the second and third pleonites and the more uniformly coloured pleonal bands (in L. vittata , the third band is conspicuously more intense than the other bands) ( Laubenheimer & Rhyne 2010: fig. 3; Anker & De Grave 2016: figs. 67–68; Pachelle et al. 2016: fig. 12; 2018: fig. 1). After a recent report of L. lipkei from Sergipe ( Alves et al. 2018), Bahia represents the fourth Brazilian state where the species has been found, suggesting that it continues to spread southwards.

Figures

FIGURE 11. Lysmata lipkei Okuno & Fiedler, 2010, non-ov. specimen from Sergipe, Brazil (pocl 5.5 mm; MZUSP 37415): (A) frontal margin and cephalic appendages, lateral view; (B) infraorbital region, lateral view; (C) same, dorsolateral view; (D) left third maxilliped, antepenultimate and penultimate articles, ventromesial view; (E) left antennule, third article of antennular peduncle and flagella, mesial view; (F) same, bifurcation between upper flagellum and accessory ramus, mesial view; (G) right first pereopod, merus to propodus, lateral view. Weak articulations represented by a dotted line.

FIGURE 16. Distribution map for 11 species of Lysmata Risso, 1816 currently known from the Brazilian coast and offshore islands. Abbreviations: Alagoas (AL), Amapá (AP), Atol das Rocas (AR), Bahia (BA), Ceará (CE), Espírito Santo (ES), Maranhão (MA), Pará (PA), Paraíba (PB), Paraná (PR), Pernambuco (PE), Piauí (PI), Rio Grande do Norte (RN), Rio Grande do Sul (RS), Rio de Janeiro (RJ), Santa Catarina (SC), São Paulo (SP), São Pedro e São Paulo (SPSP), Sergipe (SE), Trindade e Martim Vaz (TMV).