Alexandre Oliveira Almeida

Neopontonides Brucei , a New Pontoniine Species From Brazilian Waters (Decapoda, Palaemonidae)

[Neopontonides brucei, a new species of pontoniine shrimp is described from Brazil and the west coast of Panama. The Panamanian specimens were probably associated with gorgonians. Eine neue Art pontoniiner Garnelen, Neopontonides brucei n. sp., wird aus Brasilien und von der Westkuste Panamas beschrieben. Die Exemplare aus Panama waren moglicherweise mit Gorgonien vergesellschaftet., Neopontonides brucei, a new species of pontoniine shrimp is described from Brazil and the west coast of Panama. The Panamanian specimens were probably associated with gorgonians. Eine neue Art pontoniiner Garnelen, Neopontonides brucei n. sp., wird aus Brasilien und von der Westkuste Panamas beschrieben. Die Exemplare aus Panama waren moglicherweise mit Gorgonien vergesellschaftet.]

Alien shrimps in evidence: new records of the genus Athanas Leach, 1814 on the coast of Sao Paulo, southern Brazil (Caridea: Alpheidae)

The occurrence of two alien alpheid shrimps of the genus Athanas Leach, 1814 [in Leach 1813–1814], the Indo-West Pacific A. dimorphus Ortmann, 1894 and the Eastern Atlantic A. nitescens (Leach, 1813 [in Leach 1813–1814]), on the coast of the state of São Paulo, Brazil, is reported. The presence of A. dimorphus extends the range of this species in the western Atlantic farther to the south in Brazil, whereas A. nitescens is reported for the first time in the western Atlantic, representing the second alien alpheid species on this side of the Atlantic and the twenty-first decapod crustacean introduced in Brazil. We provide morphological accounts of the material examined and illustrate the most important diagnostic characters of both species. An overview of the possible mechanisms of their introduction on the coast of São Paulo is also provided.

Observations on the life history of a rare shrimp, Salmoneus carvachoi (Crustacea: Caridea: Alpheidae), a possible simultaneous hermaphrodite

m.v. oliveira, a.c. costa-souza, f.j. guimara~es, a.o. almeida and j.a. baeza Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz, Ilhéus, Bahia, Brazil, Departamento de Zoologia, Universidade Federal de Pernambuco (UFPE), Centro de Ciências Biológicas, Recife, Pernambuco, Brazil, Department of Biological Sciences, Clemson University, Clemson, South Carolina, USA, Smithsonian Marine Station at Fort Pierce, Fort Pierce, Florida, USA, Departamento de Biologı́a Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte, Coquimbo, Chile

Extension of the known southern distributions of three estuarine snapping shrimps of the genus Alpheus Fabricius, 1798 (Caridea, Alpheidae) in South America

ALEXANDRE O. ALMEIDA1,3) and FERNANDO L. MANTELATTO2) 1) Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz. Rodovia Jorge Amado, km 16. 45662-900, Ilhéus, Bahia, Brazil 2) Laboratory of Bioecology and Crustacean Systematics (LBSC), Department of Biology, Faculty of Philosophy, Science and Letters at Ribeirão Preto (FFCLRP), University of São Paulo (USP), Graduate Program in Comparative Biology, Av. Bandeirantes 3900, 14040-901, Ribeirão Preto (SP), Brazil

Further record of Trachypenaeopsis mobilispinis (Rathbun) (Decapoda, Penaeidae) from Brazilian coastal waters

In the Brazilian fauna, the Dendobranchiata are represented by 7 families, 26 genera, and 61 species (D’Incao, 1995a). During the 1990s the species, Aristeus antillensis A. Milne-Edwards & Bouvier, 1909, Aristaeopsis edwardsiana (Johnson, 1867), Benthesicymus bartletti Smith, 1882, Sicyonia stimpsoni Bouvier, 1905, Sergestes armatus Kroyer, 1855, S. corniculum Kroyer, 1855, Sergia prehensilis (Bate, 1881), and S. regalis (Gordon, 1939) were collected during the project “Recursos Vivos da Zona Economica Brasileira (REVIZEE)” carried out along the Brazilian coast (Ramos-Porto et al., 2000; Santos et al., 2002; Silva et al., 2002; Cardoso & Serejo, 2003). Yet, three non-indigenous, introduced shrimp species can be found in Brazil, i.e., Penaeus monodon Fabricius, 1798, Metapenaeus monoceros (Fabricius, 1798) (both Indo-West Pacific), and Litopenaeus vannamei (Boone, 1931) (eastern Pacific) (Fausto Filho, 1987; D’Incao, 1995b; Santos & Coelho, 2002; Tavares & Mendonca, Jr., 2004). The shrimp, Trachypenaeopsis mobilispinis (Rathbun, 1915) was described by Rathbun (1915) as Metapenaeus mobilispinis from 14 individuals collected at Saba Island in the Dutch West Indies, situated in the northern half of the Windward Islands. This material was dredged over a stony bottom about 4 fathoms (approx. 6 m) deep. Burkenroad (1934) examined material of M. mobilispinis from the Turks Islands, Bahamas, deposited at the American Museum of Natural History. He transferred the species to the new genus, Trachypeneopsis [sic] and extended the known range of the species to the north. Further records of T. mobilispinis were provided by Chace (1972) from Barbuda and Saint Christopher, collected during the Smithsonian-Bredin Caribbean Expeditions, and dredged between 7 and 8 m. Chace (1972) also mentioned its occurrence

Checklist of decapods (Crustacea) from the coast of the São Paulo state (Brazil) supported by integrative molecular and morphological data: I. Infraorder Caridea: families Hippolytidae, Lysmatidae, Ogyrididae, Processidae and Thoridae

The current checklist is the result of a long-term multidisciplinary project which combined molecular techniques (mitochondrial DNA markers) and morphological analyses of adult specimens for an accurate and detailed identification of the total biodiversity of decapod crustaceans from marine and coastal (including estuaries) environments of São Paulo State (Brazil). This is the first of a series of reports and providing a checklist of caridean shrimps of the families Hippolytidae (5 spp.), Lysmatidae (6 spp.), Ogyrididae (2 spp.), Processidae (5 spp.) and Thoridae (1 sp.). We collected material of 13 species out of 19 recorded, with sequences of cytochrome oxidase subunit I - barcode region and 16S generated from 10 species. The previous record of Lysmata cf. intermedia for São Paulo is actually L. jundalini, as the first record in São Paulo/South Atlantic waters. The molecular data were helpful to confirm the identification of some species, as the occurrence of L. wurdemanni which is confirmed in the South Atlantic Ocean based on morphological, color pattern and molecular data.

New invertebrate host records (Porifera and Cnidaria) for some caridean shrimps in estuaries of north-eastern Brazil

We report for the first time the association of some caridean shrimps with the octocoral Carijoa riisei (Cnidaria: Clavulariidae) and the sponge Dragmacidon reticulatum (Porifera: Axinellidae), in estuaries from north-eastern Brazil. The alpheid shrimp Synalpheus apioceros , Synalpheus fritzmuelleri , Alpheus formosus , Alpheus carlae and the palaemonid Cuapetes americanus are reported in association with Carijoa riisei . The latter two species, plus the alpheid Alpheus buckupi, are recorded in association with D. reticulatum.

Checklist of decapods (Crustacea) from the coast of Sao Paulo State (Brazil) supported by integrative molecular and morphological data: II. Infraorder Caridea: family Alpheidae

This study is part of a series of checklists resulting from a long-term multidisciplinary project on the biodiversity of decapod crustaceans from the marine and coastal environments (including estuaries) of São Paulo State (Brazil). For that, we integrated molecular techniques (mitochondrial DNA markers) and morphological analyses of adult specimens for an accurate and detailed identification. The DNA markers were used when the morphological identification was doubtful, particularly in the recognition of cryptic species. This second manuscript presents a checklist of the Alpheidae caridean shrimps from the coast of São Paulo. We report the occurrence of Alpheus cf. paracrinitus and Synalpheus townsendi for the first time in the region. Based on our survey, 39 species of Alpheidae are known for this region: Alpheus (21 spp.), Athanas (2 spp.), Automate (2 spp.), Leptalpheus (1 spp.), Salmoneus (3 spp.), and Synalpheus (10 spp.). We collected 28 species and obtained cytochrome oxidase subunit I (barcode region) and/or 16S partial sequences of 26 of them. These sequences may be used for phylogenetic and populational analyses in further studies.

Fecundity, embryo size and embryo loss in the estuarine shrimp Salmoneus carvachoi Anker, 2007 (Crustacea: Alpheidae) from a tidal mudflat in northeastern Brazil

Studies on fecundity and embryo size have been frequently used to infer about the reproductive potential, embryogenesis, and the energy investment in embryo production in crustaceans. These parameters are relevant to the knowledge of life-history and diversity of reproductive strategies developed by this group. This study addressed the embryo production by the estuarine shrimp Salmoneus carvachoi Anker, 2007, a poorly known caridean shrimp. We investigated whether there was (1) a correlation between fecundity and carapace length, (2) an increase in embryo volume along the embryonic development, and (3) loss of embryos along development. In addition, we investigated whether the esternite length and height and width of the pleura of the second abdominal somite were good predictors of fecundity. A total of 53 embryo-carrying individuals were collected in December 2016 and February 2017 in a tidal mudflat from the estuary of the Paripe River, Ilha de Itamaracá, Pernambuco, Brazil. The carapace length ranged from 3.23 to 4.64 mm (3.78 ± 0.26 mm). Among those, 25 individuals had embryos in initial stage, 5 in intermediate stage and 15 in final stage. Fecundity ranged from 14 to 67 (33.65 ± 12.51 embryos) and was weakly correlated with carapace length. However, fecundity was strongly correlated with the width of the second sternite and width of the pleura of the second abdominal somite. Embryo volume increased markedly (93%) from the initial to the final stage of development. This increase might be due to water uptake to facilitate the membrane rupture at the onset of larvae hatching. There was significant loss of embryos only between the initial and intermediate stage. Future studies on the embryo production by other species of Salmoneus Holthuis, 1955 are necessary to understand and compare these aspects of reproductive biology. Key-Words. Caridea; Abdominal space; Embryogenesis; Reproductive biology; Reproductive potential.

Population structure, relative growth and morphological sexual maturity of the snapping shrimp Alpheus brasileiro Anker, 2012 (Caridea: Alpheidae) from the south-eastern coast of Brazil

ABSTRACT The present study investigated the population structure of the snapping shrimp Alpheus brasileiro. We tested the hypotheses that the sex ratio of the population differs from the expected 1:1 and that the growth pattern differs between adults and juveniles and between sexes. Reproductive period, juvenile recruitment and morphological sexual maturity were estimated. Samples were collected in two periods. The first sampling occurred bimonthly from March 2013 to January 2014. The second sampling occurred monthly from April 2015 to March 2016. The population structure was determined based on the size-frequency distribution of different demographic categories. To analyse the relative growth, we measured the second pleuron length, major cheliped propodus length, major cheliped propodus width, major cheliped propodus height, appendix interna length, appendix masculina length. The results showed that the sex ratio did not differ from 1:1 (male:female). Reproduction and juvenile recruitment were continuous throughout the study period. The analysis of relative growth confirmed the hypothesis that males and females, and juveniles and adults, have different growth patterns, indicating distinct strategies of energy allocation. The estimated carapace length at the onset of morphological sexual maturity was 4.9 mm in males and 4.7 mm in females. The results obtained in this study are probably related to the monogamous social behaviour of A. brasileiro. Monogamy can influence demographic parameters such as sex ratio and the size at which males and females reach morphological sexual maturity.