Pseudopolydora (Annelida: Spionidae) from European and adjacent waters with a key to identification and description of a new species

Radashevsky, Vasily I.

doi:10.1007/s12526-020-01156-7

Cited by 7 publications

(6 citation statements)

References 48 publications

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“…Adult Pseudopolydora from the Arabian Gulf described above appear identical to P. antennata from Italy recently re-described by Radashevsky (2021), and are consequently referred to this species. They have the prostomia anteriorly bifurcated, with two long, distally narrowing lobes, caruncles extending to the end of chaetiger 4, comparatively short occipital antennae, chaetiger 5 spines of the same morphology, bilobed pygidia with two fleshy semi-oval lateral lobes, and gametes developing from chaetiger 12.…”

Section: Remarksmentioning

confidence: 53%

“…1A). See comments by Radashevsky (2021) Pseudopolydora paucibranchiata - Swaleh & Mustaquim 1993: 204, fig. 2.…”

Section: Distributionmentioning

confidence: 99%

“…Taxonomic confusions resulted from the opaque concepts of the identity of P. antennata. Morphological characteristics of this species were discussed in details by Simon et al (2019) and Radashevsky (2021).…”

Section: Pseudopolydora Antennatamentioning

confidence: 99%

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Pseudopolydora (Annelida: Spionidae) from the Arabian Gulf, Kuwait

Radashevsky

Al-Kandari

Malyar

et al. 2021

EJT

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Seven species of Pseudopolydora are described and illustrated from the Arabian Gulf, Kuwait: P. achaeta Radashevsky & Hsieh, 2000, P. antennata (Claparède, 1868), P. arabica Radashevsky & Al-Kandari, 2020, P. auha sp. nov., P. kuwaiti sp. nov., P. melanopalpa sp. nov., and P. multispinosa sp. nov. The morphology of the developed planktonic larvae is described for P. antennata and P. kuwaiti sp. nov. Adults of all species live in tubes in soft sediments, while adults of P. kuwaiti sp. nov. also bore in shells of gastropods and dead corals encrusted by coralline algae. Pseudopolydora antennata and P. arabica form dense settlements up to 50 000 individuals per 1 m2, while other species are comparatively rare. The phylogenetic relationships between the examined species and other Pseudopolydora (18 species in total) were assessed in an analysis of sequence data of four gene fragments: mitochondrial 16S rDNA, nuclear 18S rDNA and 28S rDNA, and Histone 3 (2473 bp in total). Three species complexes are distinguished involving P. antennata, P. diopatra Hsieh, 1992 and P. paucibranchiata (Okuda, 1937). Sets of adult morphological features shared by species of each complex and an identification key to Pseudopolydora species from the Arabian Gulf are provided.

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Section: Remarksmentioning

confidence: 53%

“…1A). See comments by Radashevsky (2021) Pseudopolydora paucibranchiata - Swaleh & Mustaquim 1993: 204, fig. 2.…”

Section: Distributionmentioning

confidence: 99%

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Pseudopolydora (Annelida: Spionidae) from the Arabian Gulf, Kuwait

Radashevsky

Al-Kandari

Malyar

et al. 2021

EJT

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“…The differences between males and females always involve changes to the position or number of external structures such as the hooded hooks. Most recently, Radashevsky (2021) described slight differences in the location and number (one versus two) of cilia rows on the nototrochs between the male and female of a new species ( Pseudopolydora nordica sp. nov.).…”

Section: Discussionmentioning

confidence: 99%

Development and sexual dimorphism of branchiae in Streblospio benedicti

Segarra,

McCain

2023

Invertebrate Biology

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The Spionidae is one of the largest and most studied annelid families, but to date, the development and differentiation of post‐metamorphic anatomy have not been documented. This study used scanning electron microscopy to examine the development of the branchiae, presumed respiratory organs, in Streblospio benedicti. Branchiae in this species are prominent, paired head structures and first appear around the time of metamorphosis, but do not complete their development until the worm reaches the older juvenile or adult stages. We observed that as the branchiae grew, their overall morphology changed through four different shapes: small bud, tubular, tapered, and, finally, bilimbate. In addition, the abfrontal and frontal surfaces each possessed a unique set of cilia patterns, which we named, and these arose in a particular sequence between the 8‐ and 35‐chaetiger stages. This detailed examination of every stage of branchial development led us to discover that branchia in Streblospio benedicti was a sexually dimorphic organ. Streblospio benedicti is one of approximately eight Spionidae in which there is any type of structural sexual dimorphism, and it is the only species in which sexually dimorphic branchiae are found. The male's frontal surface had four unique cilia patterns, and we hypothesize that those located around the medial protrusion capture and control the release of the spermatophores. This first documentation of a spionid's branchial developmental sequence revealed that not only is this respiratory organ involved in reproduction, but it significantly differentiates after metamorphosis through adulthood.

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“…Polychaeta species were identified using a trinocular stereomicroscope according to definitions based on previous studies, and all specimens were counted. In the diagnoses, the definitions of [13,[16][17][18][19][20][21][22][23][24] were used.…”

Section: Faunistic Analysesmentioning

confidence: 99%

Exotic Polychaetes of a Sewage Pollution Influenced Lagoon (Çardak Lagoon, Turkish Straits)

et al. 2023

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This paper includes three exotic polychaeta species, Hydroides dianthus (Verrill, 1873), Polydora cornuta Bosc, 1802, and Pseudopolydora paucibranchiata (Okuda, 1937), found during benthic samplings in Çardak Lagoon (Turkish Straits). The sampling was collected from the sandy and silty bottoms known to be polluted by sewage discharges. A total of 45 specimens of exotic polychaetes (H. dianthus: 1; P. cornuta: 4; P. paucibranchiata: 40) were found. The correlation values between the annual average values of the nutrients and the polychaeta abundance showed that the highest positive relationships with the abundance were between sand content, total phosphate, and pH. P. cornuta was the most observed species with a frequency index value of 75%, while H. dianthus was represented with a single species in the study area. Albeit the previous studies, P. paucibranchiata was observed most abundantly in the sampling station having low organic matter amounts. The study showed that opportunistic polychaetes observed in Çardak Lagoon mostly preferred organically poor sediments.

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Pseudopolydora (Annelida: Spionidae) from European and adjacent waters with a key to identification and description of a new species

Cited by 7 publications

References 48 publications

Pseudopolydora (Annelida: Spionidae) from the Arabian Gulf, Kuwait

Pseudopolydora (Annelida: Spionidae) from the Arabian Gulf, Kuwait

Development and sexual dimorphism of branchiae in Streblospio benedicti

Exotic Polychaetes of a Sewage Pollution Influenced Lagoon (Çardak Lagoon, Turkish Straits)

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