A morphological anomaly in Clausocalanus mastigophorus (Claus, 1863) (Copepoda, Calanoida) from St. Peter and St. Paul Archipelago

Melo, Pedro Augusto Mendes de Castro; Júnior, Mauro de Meló; Araújo, Maria Elisabeth de; Neumann‐Leitão, Sigrid

doi:10.1590/bjb.2014.0092

Cited by 3 publications

(1 citation statement)

References 12 publications

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“…In a study on the morphological anomalies of Acartia, there was no indication found that the occurrence of anomalies on the P5 was relatively more frequent in the polluted area than in the open sea, and it was tentatively inferred that these anomalies may be a common phenomenon in nature (Brylinski 1984;Behrends et al 1997). Also, morphological anomalies have been observed at the bases of P3 in Clausocalanus mastigophorus (Claus, 1863) collected from the equatorial Atlantic (Melo et al 2014). It was assumed that this was due to a developmental error or random genetic mutations.…”

Section: Discussionmentioning

confidence: 96%

Taxonomy of three species of the genus Spinoncaea (Copepoda, Oncaeidae) in the North Pacific Ocean with focus on morphological variability

Cho¹,

Park²,

Böttger-Schnack³

2021

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Three species of Spinoncaea Böttger-Schnack, 2003 are newly recorded in three locations of the equatorial and temperate Pacific Ocean collected by using a net of 60 μm mesh size. For all three species, morphological characters and patterns of ornamentation were analyzed in detail and illustrations of both sexes, also including form variants of the females, are provided. For the first time, information about the variability of various continuous (morphometric) characters are given, such as the spine lengths on the rami of the swimming legs or the proportions of urosomites. The complementary morphological descriptions of the Pacific specimens focus on similarities or modifications of characters as compared to earlier descriptions of these species from the type locality and various other localities. For S. ivlevi (Shmeleva, 1966), originally but insufficiently described from the Adriatic Sea, the Pacific material is similar in most aspects to the comprehensive redescription of the species from the Red Sea and from the type locality, except for a difference in the morphometry of the distal endopod segment on the antenna, which is discussed here. For S. tenuis Böttger-Schnack, 2003, and S. humesi Böttger-Schnack, 2003, the Pacific material mostly coincides with the characteristic features as described in the original account from the Red Sea. For all three species, differences and/or additions in ornamentation details were found in Pacific specimens (e.g., on the intercoxal sclerite of the first swimming leg or on the genital somite of the male) and females with aberrant morphology were detected. Genetic analyses based on 12S srRNA revealed for two species, S. ivlevi and S. humesi, little or no differences in genetic sequences between Pacific specimens and those recorded from the Mediterranean Sea, thus demonstrating that specimens from both locations are conspecific. For S. tenuis, for which no comparable genetic data are available, 12S srRNA amplification was unsuccessful as was the amplification of mitochondrial COI (barcoding) for all three species. The applicability of using COI amplification for barcoding of oncaeid copepods is discussed.

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Section: Discussionmentioning

confidence: 96%

Taxonomy of three species of the genus Spinoncaea (Copepoda, Oncaeidae) in the North Pacific Ocean with focus on morphological variability

Cho¹,

Park²,

Böttger-Schnack³

2021

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An anomalous specimen of the deep-sea shrimp Glyphocrangon aculeata A. Milne-Edwards, 1881 (Decapoda, Caridea) from the South Atlantic Ocean

et al. 2018

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In this paper, we report some morphological abnormalities for the deep-sea shrimp Glyphocrangon aculeata A. Milne-Edwards, 1881, collected from the western South Atlantic. All specimens analysed herein were collected in Potiguar Basin, located in northeastern Brazil, through bottom trawls along the continental slope between 150 and 2068 m depth in 2009 and 2011. Out of 59 specimens, one ovigerous female, collected at 1074 m depth, was registered with abnormalities in some regions of the carapace, abdomen and telson. Factors such as genetic mutations, nutritional alterations, or deformities during ecdysis are suggested as being the most probable cause of the deformities reported here.

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Report of morphological abnormalities in Macrobrachium amazonicum (Heller, 1862) (Caridea, Palaemonidae) from the Brazilian Amazon province

et al. 2022

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We report morphological abnormalities for the specimens of Macrobrachium amazonicum (Heller, 1862) collected from the Amazon province in the State of Pará, Brazil, using a local trap called “matapi” at the lower Tocantins River, from June 2004 to May 2005. After sampling, the specimens were sorted out, fixed in ethanol and deposited in the carcinological collection of the Crustaceans Laboratory at the Universidade Federal Rural da Amazônia (UFRA) and the Center for Research and Management of Fishery Resources of the North Coast (CEPNOR/ICMBio). Three individuals showed morphological anomalies in the rostrum and telson. This is the first record of such morphological abnormalities for this species, but further investigation is needed to establish the cause of these anomalies in the region.

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A morphological anomaly in Clausocalanus mastigophorus (Claus, 1863) (Copepoda, Calanoida) from St. Peter and St. Paul Archipelago

Cited by 3 publications

References 12 publications

Taxonomy of three species of the genus Spinoncaea (Copepoda, Oncaeidae) in the North Pacific Ocean with focus on morphological variability

Taxonomy of three species of the genus Spinoncaea (Copepoda, Oncaeidae) in the North Pacific Ocean with focus on morphological variability

An anomalous specimen of the deep-sea shrimp Glyphocrangon aculeata A. Milne-Edwards, 1881 (Decapoda, Caridea) from the South Atlantic Ocean

Report of morphological abnormalities in Macrobrachium amazonicum (Heller, 1862) (Caridea, Palaemonidae) from the Brazilian Amazon province

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