Morphological Aberrations in Females of the Genus Acartia (Copepoda, Calanoida) in the Baltic Sea

Коршенко, А. Н.; Vtasalo, M.; Behrends, Gerda

doi:10.1163/156854097x00708

Cited by 6 publications

(1 citation statement)

References 6 publications

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“…Among marine pelagic copepods, the genus Acartia Dana, 1846 is a well-known taxon of morphological anomalies, mainly in P5. 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).…”

Section: Discussionmentioning

confidence: 98%

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: 98%

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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Intersexuality in aquatic invertebrates: Prevalence and causes

Grilo

Rosa

2017

Science of The Total Environment

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A new species of Acartia (Copepoda, Calanoida) from the Yellow Sea

Soh

Suh

2000

Journal of Plankton Research

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A new species (Acartia hongi) of Acartia (family Acartiidae) predominating in the Korean coastal waters of the Yellow Sea is described. This species closely resembles Acartia bifilosa, from which it can be easily distinguished by the co-occurrence of the following morphological characters: the absence of rostral filaments in both genders; the terminal spine on the female fifth leg toothed only on the inner side; the first exopodal segment of the male right fifth leg with a long seta; the distal segment of the male left fifth leg with a rod-like appendage. Its distribution was discussed in comparison with two sibling species, Acartia omorii and Acartia hudsonica.

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Morphological Aberrations in Females of the Genus Acartia (Copepoda, Calanoida) in the Baltic Sea

Cited by 6 publications

References 6 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

Intersexuality in aquatic invertebrates: Prevalence and causes

A new species of Acartia (Copepoda, Calanoida) from the Yellow Sea

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