The Caridean Shrimps (Crustacea--Decapoda) of the Albatross Philippine Expedition, 1907-1910

Abstract

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On a collection of freshwater shrimps (Crustacea Decapoda Caridea) from the Philippines, with descriptions of five new species

“…The freshwater shrimps of the Philippine Archipelago have been studied by several authors (DANA 1852;COWLES 1914;BLANCO 1935BLANCO , 1939HOLTHUIS 1950HOLTHUIS , 1978JOHN-SON 1962;BALETE & HOLTHUIS 1992;CHACE & BRUCE 1993;CHACE 1997;SKET 1997). Up to present, 34 species of freshwater caridean shrimps were reported from the Philippines.…”

First zoeal stage of Processidae (Decapoda, Caridea): review and new descriptions of Ambidexter symmetricus Manning and Chace 1971 and Processa fimbriata Manning and Chace 1971

“…Adults of the genus Ambidexter have a peculiar character, whereas other members of the family Processidae have only one pereiopod 1 chelate (usually the right) and the other with a simple dactyl, the species of Ambidexter have both pereiopods 1 symmetrically chelate (Chace 1997). This may well represent the ancestral condition in the Processidae (Williamson 1980).…”

“…According to our observations, these genera cannot be separated based on their larval morphology (Table 1). In addition, the adults are extremely similar and can be differentiated only by the absence (Processa) or presence (Nikoides) of exopods in pereiopod 1 (Manning and Chace 1971;Chace 1997). Despite the morphological resemblance of both adults and larvae in Processa and Nikoides, the molecular phylogeny of Caridea proposed by Bracken et al (2009) showed Processa as a sister group of Ambidexter, and Nikoides fell outside this group.…”

“…Shrimps of this family are small, nocturnal, and abundant in marine shallow-water habitats, primarily on grass flats and in tide pools in pantropical and subtropical regions; some are components of the offshore fauna (Manning and Chace 1971;Chace 1997). …”

Recent samples of mainly rare decapod Crustacea taken from the deep-sea floor of the southern West Europe Basin

“…Remarks: Chace, Jr. (1986) considered the differences of this species in comparison with the other members of the genus Acanthephyra as so important that he set up the new genus Heterogenys with the only species Heterogenys microphthalma. The identification of the species is easy because of several characteristic features.…”