Desenvolvimento larval de Chasmagnathus granulata Dana (Crustacea, Decapoda, Grapsidae), em laboratório: I. estudo da morfologia de cerdas nas fases de zoea e megalopa e das variações dos padrões corporais da fase de megalopa

Abstract

ABSTRACT. Larval developrnent ofClzasmagllathus granula/a Dana (Crustacea, Decapoda, Grapsidae) under laboralory conditions. I. Sludy of selae rnorphology in lhe zoe a and rnegalopae phases and lhe variations in body patterns of rnegalo· pae. The study of Chasmagllalhus granulara Dana 1851 was done with the setae morphology point ofview. The main objective ofthis description was to find differents kinds af morphologicals types of setae. During this work anomalous structures were found in megalopal phase, such as : many kinds af rostral and lateral spines, as well as many kinds of spines on the telson and ane kind of dorsal spine which never was cited before in the literature concerning to this specie. KEY WORDS. Crustacea, Decapoda, Grapsidae, larval development, mJrphology Das espécies da família Grapsidae encontradas na região da cidade do Rio Grande, a mais abundante é Chasmagnathus granulata Dana, 1851, que vive sob pedras à margem da água ou construindo galerias, constituindo os típicos caranguejais. Esta espécie teve o estudo de seu desenvolvimento larval reali zado por BOSCHI et aI. (1967). Poucos estudos foram real izados sobre morfologia de cerdas em Crustacea sendo que os primeiros trabalhos datam do sécu lo XIX (CARBONNIER 1869; HUXLEY 1880).Já no início do século XX, surgiram os trabalhos de PANNING (1924), RINGEL (1924), FERR IS (1934) que ainda não foram precisos quanto à definição da diferença entre cerdas e espinhos.Com as recentes pesquisas sobre morfologia de cerdas iniciados por THOMAS ( 1970), FISH (1972), FARMER (1974, VAN HERP & BELLON-HuMBERT ( 1978), POHLE & TELFORD (1981), LONGMUIR (1983), JACQUES (1989), W ATLlNG ( 1989), INGLE (1992) e CALAZANS & INGLE (1998, utilizando microscopia óptica e eletrônica, tornou-se possível realizar um estudo mais detalhado sobre tais estruturas. No que se refere à importância das cerdas sob o ponto de vista da morfologia funcional , como por exemplo nas peças bucais, nos processos de captura, seleção, manipulação do alimento, nas diversas fases do desenvolvimento pós-embrionário,

The complete larval development of Panopeus lacustris Desbonne 1867 (Brachyura: Panopeidae), from the Amazon region, reared in the laboratory

“…The terminology used in the morphological descriptions followed Factor (1978), Clark et al. (1998), Riger and Santos (2001), Garm (2004), Horn and Buckup (2004), and Pohle and Telford (1981). Samples of larvae and the female of the P. lacustris were deposited at the Museum Emilio Goeldi (Pará, Brazil), catalog numbers (MPEG 001101; MPEG 001102; MPEG 001103; MPEG 001104; MPEG 001105) (zoeas 1–4 and megalopae) and (MPEG 001100) (female).…”

Juvenile development of Dilocarcinus pagei Stimpson, 1861 (Brachyura, Trichodactylidae) reared in the laboratory, with emphasis on setae morphology

“…In Brazil, few studies have been conducted on crustacean setae, for instance in the study of adult Anomura MacLeay, 1838 and Parastacidae Huxley, 1879 (Horn & Buckup, 2004); in larval stages of shrimp (Calazans & Ingle, 1998) and crabs (Rieger & Santos, 2001;Rieger et al, 2003), and the oral appendages of Thalassinidea Latreille, 1871 (Coelho et al, 2000), with functional importance in the capture, selection and manipulation of food.…”

Comparative morphology of the first zoea of twelve brachyuran species (Crustacea: Decapoda) from the Amazon region

“…Characters in the key are based mainly on external characters that can be viewed without dissection. The terminology used in the descriptions follow FACTOR (1978), POHLE & TELFORD (1981), CLARK et al (1998), RIEGER & SANTOS (2001), GARM (2004), HORN & BUCKUP (2004). Samples of larvae and females were deposited in the Museum Emilio Goeldi (Pará, Brazil) developed armed distally with rows of spines.…”