Comparative analysis of fecundity between Dilocarcilllts pagei Stimpson and Sylviocarcil/lI s allstralis Magalhães & Turkay (Crustacea, Decapoda, Trichodactylidae) in the Pantanal region of Paraguay River, Porto Murtinho, Mato Grosso do Sul. The aim of this study was to estimale lhe fecu ndity of
Misael Domingues Rodrigues 2Nilton José Hebling 3Six zoeal stages and the megalopa of the comestible crab Ucides cordatus cordatus (Linnaeus, 1763) are described and illustrated. The larvae were reared in the laboratory at temperature 25 ± lOC and water salinity of 24 0 /00; duration of stages and survival rates were measured. Comparisons with the descriptions of the zoeal morphologic characters of Ocypodidae and Gecarcinidae perrnited to include definitively U. c. cordatus in the family Ocypodidae, subfarni1y Ocypodinae. INTRODUCTIONThe comestible crab, Ucides cordatus cordatus, is very commom in the mangrove forests of the Western Atlan tic coast, occurring, according to COELHO & RAMOS (1972), from Florida, Antiles, northern South America, Guiana to Brazil (to the State of Santa Catarina).8ased upon the morphology of the adults, the genus Ucides Rathbun, 1897 has characteristics of both families Gecarcinidae and Ocypodidae. H. MILNE EDWARDS (1837), LEBOUR (1928), RATHBUN (1918RATHBUN ( , 1933, HOLTHUIS (1959), BRIGHT (1966) and PRAHL & MANJARRÉS (1984) considered it in the family Gecarcinidae while CHACE & HOBBS (1969) , TURKA Y (1970, WARNER (1977) and MELO (1985) in the farnily Ocypodidae.ln this paper aredescribed and illustrated alI the larval forms of U. c cordatus.The larval characters are compared with those of the other species of Gecárcinidae and Ocypodidae in order to help solve the controversal systematic position of this genus. MATERIAL AND METHODSOvigerous Jemales of U. c. cordatus were collected on January 18, 1981Research supported by CAPES -PICO. Revta bras. Zoo!.in the mangroves in the canal of Bertioga (23°51 'S, 46°09W), northern litoral of São Paulo, Brazil. After eclosion 60 zoeae were isolated in Petri dishes of 20 mi, with sea water having a salinity of 24 0 /00 and maintained in a climatic room at 25 ± 1 ° C with a photoperiod of 12 hours light and dark. During ali their development, the larvae were fed with freshly hatched nauplii of Artemia salina, after daily changes of water.Dead larvae were fixed and preserved in a mixture of ethol a1cohol 70% and glycerine in a proportion of 1: 1. The exuviae were preserved in glycerine.Measurements and designs were made using a Zeiss microscope with drawing tube. When possible 10 larvae of each stage were analyzed.The following symbols were adopted for the diferent larval stages : I, first zoeal stage; II, second zoeal stage; III, third zoeal stage; IV, fourth zoeal stage; V, fifth zoeal stage that produces zoea VI; V I, fifth zoeal stage that produces directly the megalopa; VI, sixth zoeal stage; MI , megalopa produced by zoea V I ; M2 , megalopa produced by zoea VI.The figures and morphological descriptions of the fifth zoeal stage and of the megalopa were based, respectively, upon stages V and M 2 , because they were most common in the larval development. For stages V I and MI only the alterna te morphologies were mentioned in relation to V and M2 •
RESUMO A natom ia Funcional de A n o d o n tites trapezeus (S p ix ) e A n o d o n tites trapesialis (L a m a rc k ). (B iv alv ia: M ycetopodidae).A anatom ia funcional co m p arad a de duas espécies de bivalves límnicos, é an alisad a. ABSTRACT T h e confronted functional anato m y of tw o species of limnic bivalves, is analysed. A n o d o n tites trapezeu s and th e A n o d o n tites trapesialis,of th e M ycetopodidae fam ily, are comm on in the in terio r of the S tate of São P au lo . T h ey live in th e sam e environm ent and are ad a p te d to the still w a te r environm ent. T h eir functional a n a tom y, w a s stu d ied for the first tim e p ro viding valuable inform ations ab o u t the stom ach and show in g in a g en eral w ay, th a t th e intern al stru c tu re is of g re a t uniform ity in these anim als, such as it occurs am ong the U nionacea, w hich w ere stu d ied by o th er au th o rs. _ INTRODUCTIONIn South America there are four sub-families of the Mycetopodidae Gray, 1840, among them the Anodontitinae Modell, 1942, to which the genus A nodontites Bruguière 1792 (Parodiz and Bonetto, 1963) belongs.This genus belonged previously to the Mutelidae Gray family, 1847 (Simpson, 1914; Ortmann, 1921; Hass, 1930 Hass, , 1931 Modell, 1942, 1949, apud Parodiz and Bonetto, 1963, with a large distribution throughout South America, particularly in Brazil (Parodiz and Bonetto, 1963).So as to contribute to a greater knowledge of our malacofauna, especially with reference to the functional anatomy of the limnical bivalves, species were studied which can be found easily in the interior of the State of São Paulo -Anodontites trapezeus Spix, 1827 and Anodontites trapesialis Lamarck, 1819.Nothing is known regarding the functional anatomy of the limnical bivalves in Brazil. Systematic studies were made (Ortmann, 1911(Ortmann, , 1921 Frierson, 1922; Marshall, 1928 Marshall, , 1928a Marshall, , 1930 Marshall, , 1932 Thiele, 1935; Haas, 1939 Haas, , 1939a Haas, , 1945 Haas, , 1949 Mendes, 1939; Lange de Morretes, 1949; Bo netto, 1954 Bo netto, , 1962 Bo netto, , 1965 Bo netto, , 1967 Parodiz and Bonetto, 1963; Penna and Leme, 1964; Parodiz, 1968; Bonetto and Mansur, 1970; Mansur, 1970). The larval development of several species of bivalves, among them the A. trapezeus and A. trapesialis (Bonetto, 1951(Bonetto, , 1959(Bonetto, , 1961(Bonetto, , 1962(Bonetto, , 1963 Bonetto and Ezcurra, 1962; Parodiz and Bonetto, 1963) was studied.As for the other fresh-water species, there are some papers about the functional anatomy, but all of them dealing with only isolated aspects in species that belong to different genera and even to different families. Thus, a survey about all the aspects of the functional anatomy of the A. trapezeus and A. trapesialis is fully justified.To the major aim of this study, the compared functional anatomy of these limnical species, are added some ecological aspects and the attempt to check whether certain characteristics are caused by an adapt ation to the environment, ...
ABSTRACT. Juvenile development of Hepatus pudibundus (Herbst) (Crustacea, Decapoda, Calappidae) in laboratory. The Hepatus pudibundus (Herbst, 1785) juvenile development was studied in laboratory, under the morphological and systematical stand points. The eight early juvenile stages were obtained from larvae hatched from eggs of two ovigerous females, collected at the northern coast of the State of São Paulo, Brazil. The experiments were carried out in a climatically controlled room at 25 ± 1ºC, and steady saltness of 34º/oo . The youngs were maintened individually and food consisted of Artemia sp. nauplii and fragments of fish muscle.The first juvenile stage were particulary drawn and described. For the remaining juvenile stages the most representative frameworks were picked out, which allowed the characterization of the first eight stages. According to juvenile morphology studies, it was noted that secondary sexual characters differentation begins from the third stage.
Este trabalho foi realizado com a finalidade de descrever a anatomia externa das larvas de Clibanarius antillensis STIMPSON, 1859 criadas em laboratório. Os estádio de zoea e megalopa foram descritos. Fêmeas ovígeras foram coletadas em praias de S. Sebastião, São Paulo, Brasil. Os animais foram mantidos até a eclosão no laboratório em água do mar filtrada (salinidade 35 °/oo). As larvas foram criadas individualmente e alimentadas com nauplius de Artemia salina e a água foi mudada diariamente. Quatro ou cinco estádios de zoea e megalopa foram obtidos e o período de desenvolvimento foi completado em 39 dias (valor médio) à 18,8°C e 29 dias à 22°C. Comparações anatômicas foram feitas com larvas de outras espécies brasileiras particularmente com as do mesmo gênero. Observou- se estreita correlação entre C.antillensis e C. vittatus (Bosc, 1802).
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