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Lysmata napoleoni sp. nov. from Ascension Island, specimens not collected, (a) colour pattern by day; (b) nocturnal cleaning behaviour. Photographs by Judith Brown.
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Zootaxa 4429 (2): 390-400 Abstract A new species of the caridean shrimp genus Lysmata Risso, 1816 is described from St. Helena and Ascension Island in the south-central Atlantic. Lysmata napoleoni sp. nov. is part of the so-called "long-branch group" of the genus and shows a strong morphological similarity with the eastern Atlantic L. seticaudata R...
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... All specimens of Lysmata napoleoni sp. nov. were collected while scuba diving at 8.5-17.7 m, on hard or mixed (rocky-sandy) bottoms. The new species appears to be always associated with -or at least is found in the vicinity of -the sea anemone Telmatactis cricoides (Duchassaing) (P. Wirtz, pers. comm.), although the exact nature of this association remains unknown. Photographic evidence (Fig. 5b) shows that the new species engages in nocturnal fish cleaning behaviour (see also Brown et al. ...
Citations
... Lysmatidae Dana, 1852 is currently comprised of five genera (Exhippolysmata Stebbing, 1915, Ligur Sarato, 1885, Lysmata Risso, 1816, Lysmatella Borradaile, 1915and Mimocaris Nobili, 1903, of which Lysmata is the most speciose with 50 valid species (Prakash and Baeza, 2017;De Grave and Anker, 2018;Wang and Sha, 2018;Ashrafi et al., 2021;Guéron et al., 2022). These shrimps are widely distributed from tropical to temperate regions and exhibit a wide diversity of social systems (e.g. ...
... Journal of the Marine Biological Association of the United Kingdom 9 moorei by the shape of the intraorbital process, which is more than 6 times as wide as it is high in the latter vs 1.53 times in the former (see Figure 13C in Pachelle et al., 2020). The fourth pleonite with the posterolateral angle rounded of L. napoleoni, L. seticaudata and L. ternatensis (Chace, 1997;D'Udekem D'Acoz, 2000;De Grave and Anker, 2018) also distinguishes from L. elisa sp. n., which possesses a pointed posterolateral angle. ...
Currently, 14 of the 50 species of Lysmata are known to possess a long accessory branch with more than two articles. Historically, Lysmata intermedia and Lysmata moorei were the only two 'long-branch' species inhabiting the southwestern Atlantic. Here we describe, based on morphological, molecular and colour pattern data, a new species of Lysmata possessing a long accessory branch from Pernambuco, northeastern Brazil. Our maximum-likelihood analysis recovered Lysmata elisa sp. n. as a sister species to Lysmata jundalini. Both species are closely related to Lysmata holthuisi and L. intermedia. The four aforementioned species comprise the L. intermedia species complex. The new species may be morphologically distinguished from the other closely related species by different sets of characters, which include details of the dorsolateral antennular flagellum, armature of ischium of the second pair of per-eiopods, intraorbital process shape and relative proportions of pereiopods. Our results reinforce the importance of refining biodiversity data through the application of integrative taxonomic approaches to expand the knowledge of local and global biodiversity. The biodiversity of Lysmata deserves special attention, as they are intensively exploited in the aquarium trade.
... Shrimps from the genus Lysmata Risso, 1816 (Infraorder Caridea, family Lysmatidae Dana, 1852) are widely distributed in tropical and subtropical regions worldwide (De Grave & Anker 2018;Giraldes et al. 2018) and include 48 species (Rhyne & Lin 2006;Baeza & Anker 2008;De Grave & Fransen 2011;Anker & Cox 2011;Rhyne et al. 2012;Soledade et al. 2013;Gan & Li 2016;Pachelle et al. 2016;Prakash & Baeza 2017;Wang & Sha 2018;De Grave & Anker 2018;Giraldes et al. 2018). They present a wide range of lifestyle and habits, such as living in dense aggregations and moving freely among rocks [e.g., Lysmata californica (Stimpson 1866) (Bauer & Newman 2004) and Lysmata ankeri Rhyne & Lin 2006(Barros-Alves et al. 2016], or living in monogamous pairs usually in symbiotic associations [e.g., Lysmata grabhami (Gordon 1935) (Wirtz 1997) and Lysmata pederseni Rhyne & Lin 2006(Baeza et al. 2016]. ...
... Shrimps from the genus Lysmata Risso, 1816 (Infraorder Caridea, family Lysmatidae Dana, 1852) are widely distributed in tropical and subtropical regions worldwide (De Grave & Anker 2018;Giraldes et al. 2018) and include 48 species (Rhyne & Lin 2006;Baeza & Anker 2008;De Grave & Fransen 2011;Anker & Cox 2011;Rhyne et al. 2012;Soledade et al. 2013;Gan & Li 2016;Pachelle et al. 2016;Prakash & Baeza 2017;Wang & Sha 2018;De Grave & Anker 2018;Giraldes et al. 2018). They present a wide range of lifestyle and habits, such as living in dense aggregations and moving freely among rocks [e.g., Lysmata californica (Stimpson 1866) (Bauer & Newman 2004) and Lysmata ankeri Rhyne & Lin 2006(Barros-Alves et al. 2016], or living in monogamous pairs usually in symbiotic associations [e.g., Lysmata grabhami (Gordon 1935) (Wirtz 1997) and Lysmata pederseni Rhyne & Lin 2006(Baeza et al. 2016]. ...
The early larval stages of the shrimps Lysmata ankeri and L. bahia were described, illustrated, and compared among other Lysmata species, providing important information on post-embryonic development and insights into its evolutionary history. Ovigerous specimens of L. ankeri and L. bahia were sampled from southeastern and northeastern Brazilian coast, respectively. For L. ankeri and L. bahia, five and three larval stages were obtained, respectively. Unique features were observed for L. ankeri and L. bahia larvae, and some characteristics may differ only for L. ankeri and L. bahia, which were not observed in the other species analyzed, such as: presence of a pair of simple setae on the third pleonal somite in zoea I and number of setae on the uropod exopod greater than 11. Moreover, several other features are similar between species from the diferent clades of the Lysmata-Exhippolysmata complex, making it possible to identify the early stages of Lysmata larvae. However, future studies will be essential to confirm or not the existence of some phylogenetic patterns and their relevance and other larval characters for better understanding the evolutionary history of this group.
... (Risso) larvae are easily recognizable by their stalked eyes with a distinct shape (in first zoea eyes are sessile), long rostrum and a long fifth pereiopod bearing a paddle-like propodus with serrated margins (Calado 2008). The genus has 48 extant species (De Grave & Fransen 2011;De Grave & Anker 2018), of which only three have complete larval descriptions known so far. Lysmata wurdemanni Kurata (1970) has eleven zoeal stages plus a decapodite described, while both L. ensirostris (Bensam & Kartha 1967;Pillai 1974) and L. seticaudata Calado et al. (2004) have nine zoeal stages plus a decapodite. ...
Complete larval morphological descriptions are currently only known for three of the 48 species of genus Lysmata. The present study describes and illustrates the larval development of Lysmata amboinensis (De Man) reared under laboratory conditions. Lysmata amboinensis larval development is composed by a total of ten zoea and a decapodite stage. The first zoeal stage larvae presents sessile eyes, a carapace with a pterigostomial spine and anterio-ventral marginal denticles, a long, slender, and pointed rostrum, an antennal exopod terminally articled, a pleon with five somites, the fifth one bearing a pair of dorso-lateral spines on the posterior margin, and a triangular shaped telson with 7+7 posterior processes. The decapodite resembles a smaller adult and has extremely long antennas (more than twice the total length of the decapodite), the first two pair of pereiopods with chela, first four pairs of pereiopods with reduced and entire exopods, and fully developed pleopods. The morphological features of L. amboinensis are compared with those currently available for the larval stage of the genus Lysmata.
... Although no information about the carpal and meral spinulation of the three last pereiopods was provided by De Man (1902), it seems that these two species are similar in the latter character according to Xu & Li (2015). Importantly, as discussed by De Grave & Anker (2018), and according to personal observations by one of the authors (HA) on other congeners, i.e., L. vittata and L. kuekenthali, characters like the rostral armament, second pereiopod carpal segmentation, and carpal and meral spinulation on three last pereiopods, especially the third one, can be highly variable within a species and consequently untrustworthy for separating taxa. However, based on the original description (De Man 1902) and other published reports on L. ternatensis (e.g., Chace 1997;Xu & Li 2015;Madhavan et al. 2019), the accessory ramus of the lateral antennular flagellum in L. ternatensis consists of 10 segments (10 to 15 segments were reported for material from the China Sea by Xu & Li in 2015), thus their distinctly higher number clearly distinguishes L. ternatensis from L. malagasy sp. ...
The present study focuses on shrimps belonging to the genus Lysmata Risso, 1816, collected from Madagascar during the Atimo Vatae expedition carried out in 2010. Lysmata malagasy sp. nov. is a new species belonging to the clade named “long accessory ramous” or “cosmopolitan” in previous phylogenetic studies. The new species can be distinguished from the only two other representatives of this group in the Indo-west Pacific, L. ternatensis De Man, 1902, and L. trisetacea (Heller, 1861), by the accessory ramus of the lateral antennular flagellum consisting of four elongated articles. Lysmata lipkei Okuno & Fiedler, 2010 is reported here from Madagascar with a remarkable extension of its known range after its original description from Japan. This species has also been reported from Singapore and, as alien species, from Brazil. Lastly, L. kuekenthali De Man, 1902 known from numerous localities in the Indo-West Pacific biogeographic area, is reported for the first time from Madagascar. Results of the present morphological and molecular analyses suggest that L. hochi Baeza & Anker, 2008 from the Caribbean Sea is a synonym of the Indo-West Pacific L. kuekenthali, and thus the latter species is alien in the western Atlantic.
... Nauplius, 29: e2021032 introduction The genus Lysmata Risso, 1816, which belongs to the family Lysmatidae Dana, 1852b, is composed of widely distributed species with distinct behavior (social and sexual) and life habits in different marine environments (Bauer, 2000;Rhyne and Lin, 2006;Baeza, 2009;Soledade et al., 2013). Currently, the genus includes 47 species distributed worldwide (Pachelle et al., 2020), with 18 reported in the Atlantic (Chace, 1972;Rhyne and Lin, 2006;Baeza and Anker, 2008;Anker and Cox, 2011;De Grave and Fransen, 2011;Rhyne et al., 2012;Soledade et al., 2013;Gan and Li, 2016;Pachelle et al., 2016;Prakash and Baeza, 2017;Wang and Sha, 2018;De Grave and Anker, 2018;González-Ortegón et al., 2020) and 11 of these on the Brazilian coast in which three of them, Lysmata lipkei Okuno andFiedler, 2010, Lysmata uncicornis Holthuis andMaruin, 1952, and Lysmata vittata (Stimpson, 1860), are exotic (Pachelle et al., 2020). ...
Abstract The objective of this study is to report the first occurrences of three species from the genus Lysmata Risso, 1816 in an area of the Queimada Grande Island (QGI), a conservation unit on the southern coast of São Paulo, southeastern Brazil. The specimens were sampled manually in August 2018 from a small rocky formation from the QGI region. The species Lysmata bahia Rhyne and Lin, 2006, Lysmata uncicornis Holthuis and Maruin, 1952, and Lysmata vittata (Stimpson, 1860) are reported, of which the last two are not native to the Western Atlantic waters. The present study reports L. uncicornis for the first time on the coast of São Paulo State. The records informed herein not only provide more information about biodiversity, but can also help in the development of management plans and conservation.
... Caridean shrimps from the genus Lysmata Risso, 1816(Lysmatidae Dana, 1852 include 47 species that are widely distributed in tropical and subtropical regions worldwide (Anker et al. 2009;De Grave & Fransen 2011;Prakash & Baeza 2017;De Grave & Anker 2018;Giraldes et al. 2018;Wang & Sha 2018). Shrimps from this genus have a diverse lifestyle and exhibit a wide range of social behaviors. ...
Considering the importance of establishing different approaches to the early detection of invasive species, the present study aimed to describe and illustrate the morphology of the early larval stages of the shrimp Lysmata lipkei, an invasive species in the Western Atlantic. Additionally, we did a morphological comparison and a review of the other Lysmata species from the Western Atlantic Ocean with a known larvae description. The larvae used in this study were obtained by the maintenance, under laboratory conditions, of ovigerous hermaphrodites of L. lipkei, collected in the wild. Then, larvae were dissected under a stereo microscope and illustrated using a microscope equipped with a camera lucida. The first three larval stages (zoeae) of L. lipkei were illustrated, described, and compared to other species of Lysmata previously described of the Western Atlantic. Some features of the larval morphology of L. lipkei are very similar when compared to other Lysmata species with previous larval descriptions, such as a rostrum long and simple, the eyes stalked with a long peduncle from the second zoeae, one pterygostomian spine and several denticles along the anterior ventral margin of the carapace, similarities in the segmentation of the maxillipeds, and the presence of dorsolateral spines on the posterior margin of the 5th pleomere, among other features. Also, unique features were observed for L. lipkei, such as differences in the setation of some structures, including the antennule, antenna, maxillule, and maxillipeds. Using the morphological descriptions, we expect to identify species from the plankton, especially invaders, that might be present in the Western Atlantic, as well as assist in several areas in which the larval morphology is relevant.
... Lysmata currently includes 47 valid species worldwide, 18 of which occur in the western Atlantic Ocean (Chace 1972;Rhyne & Lin 2006;Baeza & Anker 2008;Anker & Cox 2011;De Grave & Fransen 2011;Rhyne et al. 2012;Soledade et al. 2013;Gan & Li 2016;Pachelle et al. 2016;Prakash & Baeza 2017;Wang & Sha 2018;De Grave & Anker 2018;González-Ortegón et al. 2020). ...
The present study is a taxonomic revision of the species of the shrimp genus Lysmata Risso, 1816 from Brazil, based on literature records and specimens deposited mostly in the Museu de Zoologia da Universidade de São Paulo (MZUSP). (2018) is re-identified as L. intermedia, based on a re-analysis of their voucher specimens. On the other hand, a single non-ovigerous specimen from Espírito Santo without a photographic voucher, is tentatively identified as L. cf. jundalini. The importance of some morphological characters often used in the taxonomy of Lysmata is discussed in the light of the present material. Several species are illustrated, some with new locality or state records along the Brazilian coast. Doubtful literature records are commented and an updated taxonomic key for the Brazilian species of Lysmata is provided.
... Caridean shrimps belonging to the genus Lysmata Risso, 1816 are very diverse with 48 valid species known to date (Chace, 1997;De Grave & Fransen, 2011;De Grave, & Anker, 2018;Madhavan et al., 2019), which were exhibit a wide diversity of lifestyles, mating systems, symbiotic relationships and colouration (Rhyne & Anker, 2008;Baeza, 2009;Baeza et al. 2016). These species inhabited in shallow or deep, warm temperate, tropical rocky and coral reefs regions of around the world. ...
The present study reports the new records of two species of the hippolytid shrimp genus Lysmata Risso, 1816 in the water off Lakshadweep Islands, India from the Arabian Sea, viz. Lysmata hochi Baeza & Anker, 2008 and Lysmata amboinensis (De Man, 1888) with more taxonomic information. Moreover, L. hochi is the first distributional report from the Indian Ocean. It is morphologically similar to L. kuekenthali and differences are discussed. Colour pattern and morphological trait of L. amboinensis are very close to L. grabhami which also differs in the presence of anti-penultimate segment of 3 rd maxilliped more than 2.0 times as long as penultimate segment and stylocerite does not reaching the distal end of the cornea. These specimens were obtained at a depth of 0.5-2 m from the intertidal region of Agatti Island. Additionally, we estimated pairwise genetic distances for these two species and congeneric species using cytochrome oxidase subunit I gene sequences where interspecific distances ranged from 11-25.8 %.
... Photographic records of selected species (identified by SDG) were published in , adding a further six species to the known fauna. Based on the 2012-2014 collections, two new species have already been described from St. Helena, viz., Lysmata napoleoni De Grave & Anker, 2018 (also known to occur at Ascension Island) and Hippolyte karenae Fransen & De Grave, 2019(De Grave & Anker, 2018Fransen & De Grave, 2019). This brings the total number of caridean shrimps known from St. Helena to date up to 16 species. ...
... Nevertheless it is evident from the species composition that St. Helena has a close faunal affinity with Ascension Island, as already noted by Manning & Chace (1995). The currently known shallow-water caridean fauna of Ascension Island recorded in literature stands at 28 species (Brown et al., 2016;De Grave et al., 2017;De Grave & Anker, 2018), with an additional three species recorded herein, bringing the current total to 31 species. ...
We report on a recent collection of caridean shrimps from St. Helena in the south-central Atlantic Ocean, raising the total number of species known from the island to 24. Six species are newly recorded for the area, with no endemic species present. Additional three species are recorded from Ascension Island. A close biogeographical connection between the caridean faunas of St. Helena and Ascension Island is evident.
... The genus Lysmata Risso, 1816, belongs to the family Lysmatidae Dana, 1852 has 48 valid species, which are found to occur worldwide, predominantly in the Indo-West Pacific regions (Chace, 1997;Anker et al., 2009;De Grave & Fransen, 2011;De Grave et al., 2014;Prakash & Baeza, 2017: De Grave, & Anker, 2018WORMS). In India, Lysmata debelius Bruce, 1983, Lysmata amboinensis (De Man, 1888 and Lysmata vittata (Stimpson, 1860) were reported from different regions (Radhakrishnan et al., 2012;Prakash et al., 2017). ...
The present study reports the new record of Thor hainanensis Xu & Li, 2014, on the basis of material from Agatti Islands in the Lakshadweep, India. This species was recently described from Hainan Island, China. Relationship of this species to two closely related species (T. paschalis and T. amboinensis) is discussed in this manuscript. Similarly, the present study also reports the rediscovery of other species, Lysmata ternatensis De Man, 1902 from the Lakshadweep waters with detailed taxonomic description. The present specimens were found to occur in the intertidal region in small crevices and rocks at a depth of 0.5-2.0 m. Genetic analysis using the mitochondrial COI sequences for both the species reveals close agreement for the morphological identification and showed the significant variation from the closely related species.
