A description of the first zoeal stage of Pilumnus vinaceus A. Milne-Edwards, 1880 (Decapoda, Pilumnidae), with a revision of the first zoea morphology of Pilumnus Leach, 1815

The morphology of the first zoeal stage of Pilumnus vinaceus is described and compared with the zoea I of Pilumnus all species in the literature. Two ovigerous females of P. vinaceus were maintained in the aquarium facilities until the larvae hatch. The larvae of each ovigerous female were dissected using a stereoscopic microscope. The zoea I of P. vinaceus has common characteristics among the Pilumnidae as: [1] antenna of type 2; [2] maxilliped 1 with 2+2+3+3 setae on the basis and with 3,2,1,2,5 setae in the endopod; [3] maxilliped 2 with 1+1+1+1 setae on the basis and 1,1,6 setae on the endopod; [4] telson with furcal rami armed with dorsal and lateral spines. Considering the species of Pilumnus that occur in the western Atlantic, it becomes possible to identify P. vinaceus zoea I by means of the verification of the following characteristics: [1] pleonites with mediolateral processes; [2] number of setae on the antennule. It is however, important to consider that there is still a great deficit in the knowledge about the morphology of the larval forms of the species assigned to Pilumnus and we argue in favor of new descriptions to build a more robust dataset on zoeal morphology characters and use it in a phylogenetic context on the genus

Shelter preference and variation in the daily activity pattern of the ornamental shrimp Neocaridina davidi (Caridea: Atyidae)

Abstract Neocaridina davidi (Bouvier, 1904) is a shrimp commonly used in aquaculture throughout the world. It is an exotic species in several places. We investigated the preference of N. davidi for four types of shelter (rock, Vesicularia sp., Egeria sp., and wood) and its nictemeral activity variation. Individuals were divided into three experimental groups: males, non-ovigerous females, and ovigerous females. They were placed in tanks with the four shelter types and observed every 3 hours for 72 hours. Neocaridina davidi presented cryptic behavior with 82.1 ± 8.69% of individuals sheltering per observation. Sheltering was higher during the daytime (88.8 ±5.54%) than at nighttime (75.4 ± 5.53%). Vesicularia sp. was the most used shelter followed by wood. The least used shelter type was a rock. Swimming and walking were more frequently observed at nighttime, especially for ovigerous females. We have demonstrated the importance of providing shelter for the maintenance of N. davidi in tanks as well as its higher activity at nighttime

Comparação da estrutura da assembleia de camarões marinhos (Penaeoidea e Caridea) em duas localidades do sudeste brasileiro

As análises deste trabalho envolveram a estrutura da assembleia (riqueza e diversidade de espécies, equidade, similaridade) e distribuição ecológica dos camarões marinhos frente aos fatores ambientais, com o intuito de averiguar se estes diferem entre duas regiões localizadas acima e abaixo do fenômeno da ressurgência de Cabo-Frio (RJ), sendo elas Macaé (RJ) e Ubatuba (SP). O paradigma do efeito latitudinal no padrão da abundância e distribuição espaço-temporal foi verificado com o intuito de testar se o mesmo pode ser proposto para este grupo. As coletas foram efetuadas mensalmente com dois barcos camaroneiros em três transectos em áreas com profundidades dos 5 aos 20 metros. Cada transecto foi percorrido por 60 minutos em cada região. Foi estimada a diversidade (H‟) aplicando o índice de Shannon-Wiener. A equidade (J‟) e a similaridade das espécies entre as estações do ano e regiões também foram calculadas. A análise de correlação canônica (CANONICA) foi empregada com o intuito de observar a relação entre a abundância das espécies e os fatores ambientais analisados. Foram capturados 148.266 indivíduos (102.832 em Macaé e 45.434 em Ubatuba), pertencentes a 15 espécies, 13 gêneros e 6 famílias (Penaeidae, Solenoceridae, Sicyoniidae, Palaeomonidae, Alpheidae e Hippolytidae). Quase todas as espécies foram coletadas nas duas regiões amostradas, excetuando-se Sicyonia laevigata, Periclimenes paivai e Lysmata sp., que foram capturadas apenas na região de Macaé, e Leander paulensis, capturada apenas na região de Ubatuba. Uma espécie do gênero Lysmata foi encontrada na região de Macaé e, provavelmente, representa um novo registro para o estado do Rio de Janeiro ou ainda uma nova espécie. Já o camarão P. paivai teve sua distribuição geográfica ampliada para o estado do Rio de Janeiro. Foram verificados maiores valores de riqueza, equitabilidade e diversidade na região de Macaé. As variáveis ..

Nematopalaemon schmitti Ferreira et al. 2010

Nematopalaemon schmitti (Holthuis, 1950) Zoea I (Figure 3 (a – m)) Duration: 48 – 72 h. Dimensions: CL: 0.37 ± 0.02 mm; TL: 1.86 ± 0.06 mm (n = 10). Carapace (Figure 3 (a – c)): carapace smooth; rostrum without setae and short, not reaching the extremity of the eyes; pterygostomian spine present; eyes compound and sessile. Antennule (Figure 3 (a,b,d)): peduncle unsegmented; endopod as a long plumose seta; exopod with four terminal aesthetascs and one terminal plumose seta. Antenna (Figure 3 (a,b,e)): peduncle unsegmented, with a terminal spine near endopod; endopod with one long plumose seta and one terminal inner spine; exopod (antennal scale) 4-segmented, with nine plumose setae on the inner side (4, 1, 1, 3) plus three short simple setae on the outer side (1, 0, 0, 2). Mandibles: incisor and molar process developed. Palp absent. Maxillule (Figure 3 (f)): coxal endite with five simple setae; basial endite with six (one stronger and five smaller) cuspidate setae; endopod with one small terminal protuberance and one subterminal simple seta; exopodal seta absent. Maxilla (Figure 3 (g)): coxal endite bilobed with one and two terminal sparsely plumose setae on proximal and distal lobe, respectively; basial endite bilobed, with two (one simple and one sparsely plumose) setae on each lobe; endopod with one long terminal sparsely plumose seta, microtrichia on inner and outer margin as illustrated; exopod (scaphognathite) margin with five plumose setae. First maxilliped (Figure 3 (h)): coxa without setae; basis with four simple setae arranged 1 + 1 + 1 + 1; endopod unsegmented, with five (one marginal and two subterminal simple, and two terminal sparsely plumose) setae; exopod unsegmented with three long terminal plumose natatory setae. Second maxilliped (Figure 3 (i)): coxa without setae; basis with three simple setae arranged 1 + 1 + 1; endopod 4-segmented with one marginal simple, zero, one terminal simple, four terminal (two stout sparsely plumose and two simple) setae, respectively; exopod unsegmented with one small marginal simple and four long terminal plumose natatory setae. Third maxilliped (Figure 3 (j)): coxa without setae; basis with one simple seta; endopod 4-segmented with two (one marginal and one subterminal) simple, zero, two terminal (one simple and one sparsely plumose), two terminal simple (one stout and one small) setae, respectively; exopod unsegmented with one small subterminal simple and four long terminal plumose natatory setae. Pereiopods (Figure 3 (k,l)): first and second as biramous buds. Pleon (Figure 3 (a,b)): with five pleonites without setae and rounded, pleonite six fused with the telson. Pleopods and uropods absent. Anal spine absent. Telson (Figure 3 (a,m)): broad at posterior margin, with 7 + 7 plumose setae (the outer two setae plumose only in the inner margin), outermost pair subterminal, inner pair shorter; one row of minute spinules on distal margin between and around bases of the 4 + 4 inner setae. Zoea II (Figure 4 (a – n)) Duration: more than 48 h. Dimensions: CL: 0.43 ± 0.02 mm; TL: 1.98 ± 0.12 mm (n = 10). Carapace (Figure 4 (a – c)): rostrum almost reaching the extremity of the eyes stalks and with one small tooth dorsally; pterygostomian spine present; eyes compound and stalked. Antennule (Figure 4 (a,b,d)): peduncle 2-segmented; proximal segment without setae and distal segment with two terminal plumose setae; endopod and exopod unchanged. Antenna (Figure 4 (a,b,e)): unchanged. Mandibles: unchanged. Maxillule (Figure 4 (f)): coxal endite with six (four simple, one sparsely plumose and one plumose) setae; basial endite with eight (one stronger and seven smaller) cuspidate setae; otherwise unchanged. Maxilla (Figure 4 (g)): basial endite bilobed, with three (one small simple, one long simple and one sparsely plumose) setae and four (one small simple, one long simple and two sparsely plumose) setae on proximal and distal lobe, respectively; exopod (scaphognathite) margin with seven plumose setae; otherwise unchanged. First maxilliped (Figure 4 (h)): coxa with one simple seta; basis unchanged; endopod 2-segmented, with one terminal simple, four (one marginal simple, one terminal simple and two terminal sparsely plumodenticulate) setae; exopod unsegmented with two (one marginal and one terminal) simple and four long terminal plumose natatory setae. Second maxilliped (Figure 4 (i)): endopod 4-segmented with one marginal simple, zero, two terminal simple, four terminal (two stout sparsely plumose and two simple) setae, respectively; exopod unsegmented with two small marginal (one plumose and one simple) and four long terminal plumose natatory setae; otherwise unchanged. Third maxilliped (Figure 4 (j)): endopod 4-segmented with two (one marginal and one subterminal) simple, zero, two terminal sparsely plumodenticulate, three terminal (one stout and two slender) simple setae, respectively; exopod unsegmented with two small marginal plumose and four long terminal plumose natatory setae; otherwise unchanged. First pereiopod (Figure 4 (k)): coxa without setae; basis with one simple seta; endopod 4-segmented with one marginal, two terminal, one terminal, two terminal (one small and one very long) simple setae, respectively; exopod unsegmented with two small marginal plumose and four long terminal plumose natatory setae. Second to fifth pereiopods (Figure 4 (l,m)): third and fourth lacking; second and fifth as biramous buds. Pleon (Figure 4 (a,b)): unchanged. Telson (Figure 4 (a,n)): with 8 + 8 setae (the outermost pair subterminal and plumose only in the inner margin), inner pair shorter and without setules; one row of minute spinules on distal margin between and around bases of the 5 + 5 inner setae.Published as part of João Alberto Farinelli Pantaleão, Mariana Terossi, Fernando Luis Mantelatto & Rogério Caetano Costa, 2019, Comparative analysis of the early larval stages of two marine shrimp genera Leander and Nematopalaemon (CARIDEA, PALAEMONIDAE) obtained in the laboratory, pp. 881-896 in Journal of Natural History 53 (15) on pages 888-892, DOI: 10.1080/00222933.2019.1611968, http://zenodo.org/record/367313

Morphology of the first larval stage of Macrobrachium brasiliense (Heller, 1868) (Caridea: Palaemonidae)

In this paper, we describe and illustrate the morphology of the first larval stage of the prawn Macrobrachium brasiliense. Two ovigerous females were obtained in a stream environment, which belongs to Paraná River Basin, Southeastern of Brazil, and were maintained in laboratory until the time of hatching. The newly-hatched larva bears very advance morphological features, with benthic habits. They had sessile eyes and all appendages, except for the uropods; however, most of the appendages were not fully formed. The description given here is compared with the first larval stage of Macrobrachium species with abbreviated larval development from other localities.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES

Morphology of the first larval stage of Macrobrachium brasiliense (Heller, 1868) (Caridea: Palaemonidae)

In this paper, we describe and illustrate the morphology of the first larval stage of the prawn Macrobrachium brasiliense. Two ovigerous females were obtained in a stream environment, which belongs to Paraná River Basin, Southeastern of Brazil, and were maintained in laboratory until the time of hatching. The newly-hatched larva bears very advance morphological features, with benthic habits. They had sessile eyes and all appendages, except for the uropods; however, most of the appendages were not fully formed. The description given here is compared with the first larval stage of Macrobrachium species with abbreviated larval development from other localities

First zoeal stage morphology of Alpheus carlae and A. intrinsecus (Decapoda, Caridea, Alpheidae) obtained in the laboratory

The first zoeal stages of the snapping shrimps Alpheus carlae and A. intrinsecus from Brazil were obtained from laboratory-hatched specimens and a detailed morphological description is provided. The morphological characteristics of both species are compared with available descriptions of other Alpheus species with a known first zoeal stage. Remarks from a semi-quantitative comparison of species belonging to A. armillatus species complex (A. carlae and A. brasileiro) and a comparison between larvae of A. intrinsecus from two localities in Brazil are presented. It was possible to distinguish first zoea of both species from the other congeners based on morphology. No intraspecific variability was detected between A. intrinsecus larvae obtained from two locations. Some structures showed differences between species of the A. armillatus complex. However, generalizations and conclusions based on larval morphology for taxonomic rearrangements at this point need to be made with caution and accuracy, since data of a sufficient number of species are not yet available for comparison.Support for this study was provided by grants from the multidisciplinary research project by São Paulo Research Foundation – FAPESP (Thematics BIOTA 2010/50188-8 and INTERCRUSTA 2018/ 13685-5), which aims to produce a fine-scale assessment of the marine decapod biodiversity of the State of São Paulo. Complementary support came from the Coordination for the Improvement of Higher Education Personnel – CAPES – Financial Code 001 (Ciências do Mar II Proc. 2005/2014– 23038.004308/2014-14). Thanks are also due to the Brazilian National Council for Scientific and Technological Development – CNPq to research scholarships, to J.A.F.P. (PDJ 151105/2019-7), to R.A.P. (140608/2015-0), to R.C.C. (PQ 306672/2018-9) and to F.L.M. (PQ 302253/2019-0). J.A.F.P. thanks the CAPES for the award of a doctoral and post-doctoral PNPD scholarships

First zoeal stage of the crab Domecia acanthophora (Desbonne, in Desbonne & Schramm, 1867) (Decapoda, Brachyura) and revision of the larval morphology of superfamily Trapezioidea

Made available in DSpace on 2019-09-11T20:58:34Z (GMT). No. of bitstreams: 0 Previous issue date: 2016ABSTRACT The morphology of the first zoeal stage of Domecia acanthophora (Desbonne, in Desbonne & Schramm, 1867) was described from laboratory-hatched material obtained from ovigerous females collected at Vitória Island on the southeastern Brazilian coast. We compared the larval morphology (zoea I) of fourteen species of the superfamily Trapezioidea, which Domecia glabra Alcock, 1899 is the only congeneric representative of the species described in this study. The morphological characteristics of the first zoea that distinguish D. acanthophora from D. glabra are: three aesthetascs on the exopod antennule; three pairs of lateral spines on carapace; bilobed basial endite of maxilla, with four plumodenticulate setae on each lobe; and telson furcae distally spinulated. It also provides information that may enhance some phylogenetic hypotheses within Trapezioidea crabs.[Pantaleão, João Alberto Farinelli; Costa, Rogério Caetano da] Universidade Estadual Paulista, BrazilAlves, Douglas Fernandes Rodrigues; Pantaleão, João Alberto Farinelli; Barros-Alves, Samara de P.; Costa, Rogério Caetano da; Cobo, Valter José] Universidade Estadual Paulista, BrazilAlves, Douglas Fernandes Rodrigues; Barros-Alves, Samara de P.] Universidade Federal de Sergipe, BrazilCobo, Valter José] Universidade de Taubaté, Brazi

First zoeal stage of the crab Domecia acanthophora (Desbonne, in Desbonne & Schramm, 1867) (Decapoda, Brachyura) and revision of the larval morphology of superfamily Trapezioidea

ABSTRACT The morphology of the first zoeal stage of Domecia acanthophora (Desbonne, in Desbonne & Schramm, 1867) was described from laboratory-hatched material obtained from ovigerous females collected at Vitória Island on the southeastern Brazilian coast. We compared the larval morphology (zoea I) of fourteen species of the superfamily Trapezioidea, which Domecia glabra Alcock, 1899 is the only congeneric representative of the species described in this study. The morphological characteristics of the first zoea that distinguish D. acanthophora from D. glabra are: three aesthetascs on the exopod antennule; three pairs of lateral spines on carapace; bilobed basial endite of maxilla, with four plumodenticulate setae on each lobe; and telson furcae distally spinulated. It also provides information that may enhance some phylogenetic hypotheses within Trapezioidea crabs