A new species of Processidae (Crustacea, Decapoda, Caridea) and the larvae of the north European species

Williamson, Donald I.; Rochanaburanon, Thamnoon

doi:10.1080/00222937900770031

Cited by 18 publications

(27 citation statements)

References 9 publications

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“…Larvae in stages I to IV were collected from July to September, and the older stages were obtained from August to November. Rochanaburanon, 1979}, andLindley (1987) obtained the larvae in different areas of the North Sea in July, August and November, in good agreement with the present study. AI-Adhub & Wilh'amson, 1975 On two occasions (October 9 and 28), P. nouveli holthuisi larvae were taken from the plankton near Helgoland.…”

Section: -1986supporting

confidence: 79%

“…The time to metamorphosis averages about 49 days at 15~ (Williamson & Rochanaburanon, 1979). In the present work, advanced larvae were obtained in October, indicating that larval development took place in August and September.…”

Section: Processa Nouveli Holthuisimentioning

confidence: 62%

“…The parent population of these larvae may be located in the English Channel or the Irish Sea. Williamson & Rochanaburanon, 1979 Larvae of this shrimp occurred from mid-June to early November (Fig. 16).…”

Section: -1986mentioning

confidence: 99%

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Seasonal occurrence and abundance of caridean shrimp larvae at Helgoland, German Bight

Wehrtmann

1989

Helgolander Meeresunters

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Plankton samples were collected from January 1985 to January 1986 three times per week at Helgoland to study seasonal occurrence and abundance of caridean shrimp larvae. A total of eleven species were obtained. Ninety-one % of all larvae collected during the sample period belonged to Crangon crangon L. and Crangon allmanni Kinahan, 6 % to Philocheras tn'spinosus Hailstone and3 % to the remaining eight species. Collections were generally dominated by C. placed into three different groups with respect to their seasonal'occurrence. Possible advantages of the timing of larval dispersal relative to predation and food availability are given. The results on seasonal occurrence and relative abundance are discussed in relation to environmental factors (temperature, salinity) as wetl as to the geographical distribution of the species.

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Section: -1986supporting

confidence: 79%

Section: Processa Nouveli Holthuisimentioning

confidence: 62%

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Seasonal occurrence and abundance of caridean shrimp larvae at Helgoland, German Bight

Wehrtmann

1989

Helgolander Meeresunters

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“…Probably, this structure is present in other unknown larvae of the genus Processa. Gurney (1923) also reported the larval stages of P. canaliculata; however, the zoea that he described was actually the larvae of two species, the early stages of P. edulis crassipes and the later stages of P. nouveli holthuisi (Fincham and Williamson 1978;Williamson and Rochanaburanon 1979).…”

Section: Discussionmentioning

confidence: 99%

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

Terossi

Mantelatto

2014

Helgol Mar Res

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This study reviews the morphology of the first zoeal stage of the pantropical and subtropical marine shrimps of the family Processidae. We present the first descriptions of the zoea I of Ambidexter symmetricus and Processa fimbriata and compare them with available published descriptions, in order to detect patterns to differentiate the genera. Among the species of Processidae, the zoea I of Ambidexter can be differentiated by the presence of a rostrum, and the resemblance to Nikoides and Processa, previously reported for adults, is now confirmed for the larval morphology. Based on the new descriptions, A. symmetricus and A. panamensis can be easily separated by four independent larval characters: anterior tubercle on the carapace (present in A. panamensis and absent in A. symmetricus), the antennal scale (segmented distally in A. panamensis and unsegmented in A. symmetricus), and the anal spine and second pereiopod (absent in A. panamensis and present in A. symmetricus). P. fimbriata can be separated from the other 11 species of Processa by means of two larval characters: 4 aesthetascs on the exopod of the antennules, and the presence of an anal spine.

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“…The following descriptions were consulted to prove the identification and to determine the developmental stage of the individual: Athanas nitescens (Sars, 1906; Lebour, 1932a), Caridion steveni (Lebour, 1930), Eualus occultus and Eualus pusiolus (Pike & Williamson. 1961: Lebour, 1940a, Thoralus cranchii (Labour, 1932b(Labour, , 1936(Labour, , 1940a, described as Spirontocaris cranchh), Processa nouveli holthuisi and Processa moch'ca (Williamson & Rochanaburanon, 1979) and Pandalina brevirostns (Lebour, 1940b;Williamson, 1967). The discrimination of the diverse communities, as indicated by the decapod larvae assemblages, was determined by cluster analysis techniques (Whittaker & Fairbanks, 1958), using the programme package Cluster (Reiners & Grave, 1985).…”

Section: Methodsmentioning

confidence: 99%

Larvae of uncommon caridean decapods in the German Bight: Species composition, distribution and abundance

Wehrtmann

Greve

1995

Helgolander Meeresunters

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Typically, the most abundant group of shrimp larvae in the German Bight is formed by representatives of the family Crangonidae. Larvae of the remaining species have been largely ignored, and only scarce information concerning their ecology is available. Thus, the purpose of the present study was to determine the species composition, distribution and abundance of noncrangonid shrimp larvae in the German Bight in July 1990, after the mildest winter of the century. The material is based upon plankton samples collected at 77 stations, covering the entire German Bight. Eight species were identified, as well as larvae of Palaemonidae and Processa-juveniles. Processa nouveli holthuisi (53.0 %) and P. modica (31.3 %) were predominant in the collection. The distribution of the two species was clearly separated: the main concentration of P. nouveli holthuisi (peak concentration of 1.94 larvae per m 3) was confined to the northwest corner of the German Bight, while a majority of P. modica larvae (peak concentration of 0.54 larvae per m 3) occurred at the southwesterly stations. The spatial distribution of Caridion steveni and ]Zualus occultus around Helgoland indicates the presence of an adult population at the only rocky island in the study area. Other taxa, such as larvae of Palaemonidae and juvenile Pandalina brevirostris were collected exclusively in estuarine habitats. Based upon both the results of the present study and comparable data, we conclude that developmental stages of ten non-crangonid species, as well as representatives of Palaemonidae, can be expected to occur in the plankton of the German Bight. The extremely mild temperatures of the preceding winter may have been, in part, responsible for the relatively high densities of some taxa encountered during our plankton survey. We assume that warm winter temperatures favour the immigration, reproduction and survival of cold-sensitive species.

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A new species of Processidae (Crustacea, Decapoda, Caridea) and the larvae of the north European species

Cited by 18 publications

References 9 publications

Seasonal occurrence and abundance of caridean shrimp larvae at Helgoland, German Bight

Seasonal occurrence and abundance of caridean shrimp larvae at Helgoland, German Bight

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

Larvae of uncommon caridean decapods in the German Bight: Species composition, distribution and abundance

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