A new species of Stratiodrilus (Polychaeta, Histriobdellidae) from freshwater crayfishes of southern Brazil

Amato, José F. R.

doi:10.1590/s0073-47212001000100004

Cited by 6 publications

(6 citation statements)

References 2 publications

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“…Rosa et al [255] updated the list of Stratiodrilus hosts based on published data and specialized databases discussing its distribution. An identification key for all described Stratiodrilus was published by Amato et al [258].…”

Section: Systematics and Phylogenymentioning

confidence: 99%

“…Until 1962, studies were limited to descriptions of new species based on external morphology [240,243,251,262,263] and investigations of the internal anatomy [241,242,244,245,259,275]. More recently, the biology and behavior of several histriobdellid species [249,258,[264][265][266]276,277], as well as relationships with their hosts and other ectosymbionts [252,271,278] received more attention. Few studies have been carried out on the ecology of the family [249,266,267,270,271,278,279] as well as species distribution records [255,280,281].…”

Section: Distribution Patterns and Diversitymentioning

confidence: 99%

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The Current State of Eunicida (Annelida) Systematics and Biodiversity

et al. 2021

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In this study, we analyze the current state of knowledge on extant Eunicida systematics, morphology, feeding, life history, habitat, ecology, distribution patterns, local diversity and exploitation. Eunicida is an order of Errantia annelids characterized by the presence of ventral mandibles and dorsal maxillae in a ventral muscularized pharynx. The origin of Eunicida dates back to the late Cambrian, and the peaks of jaw morphology diversity and number of families are in the Ordovician. Species richness is heterogeneous among the seven recent families, with more than half of the valid species belonging to the Eunicidae + Onuphidae clade, one of the latest clades to diverge. Eunicidans inhabit soft and hard substrates from intertidal to deep waters in all oceans. The few freshwater species are restricted to Histriobdellidae, a family exclusively commensal/parasite of crustaceans. The reproductive biology, development and ecology of most families are poorly known and the information available suggests low dispersal ability. However, all families have records of widely distributed species. Scrutiny of these wide distributions has often revealed the presence of exotic species or more than one species. The exploration of the deep-sea and of new habitats has led to recent descriptions of new species. Furthermore, the revision of type specimens, the examination of new morphological features and the use of molecular data have revealed hidden biodiversity under unjustified synonyms, poor understanding of morphological features and incomplete descriptions. Molecular studies are still very few or nonexistent for the families Histriobdellidae, Hartmaniellidae, Lumbrineridae and Oenonidae. The integration of new methodologies for morphological and molecular study, along with information on biological and ecological traits appears to be the path to improve the knowledge on the diversity of Eunicida.

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Section: Systematics and Phylogenymentioning

confidence: 99%

Section: Distribution Patterns and Diversitymentioning

confidence: 99%

The Current State of Eunicida (Annelida) Systematics and Biodiversity

et al. 2021

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“…This includes cyanobacteria and chlorophyta algae, corixid eggs, mites, ostracods, oligochaetes, polychaetes, rhabdocoel flatworms, rotifers, Argulus eggs, bryozoans and zebra mussels (Alderman and Polglase, 1988;Amato, 2001;Brazner and Jensen, 2000;Cannon and Jennings, 1987;Duris et al, 2006;Edgerton et al, 2002a;Lamanova, 1971;Romero and Jiménez, 2002). The latter three are probably most important with regards to potential disease transmission through the anthropogenic and natural movements of crayfish between water bodies.…”

Section: Other Fouling Organismsmentioning

confidence: 99%

Diseases of crayfish: A review

Longshaw

2011

Journal of Invertebrate Pathology

120

106

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“…The minute histriobdellids are ectosymbionts of marine and freshwater isopod and decapod crustaceans, living commensally in their branchial chambers and on egg masses. The family includes only three genera and 13 described species: the [21][22][23][24]. The tiny (0.5-1.5 mm long), delicate body of histriobdellids is highly modified with little or no body segmentation and lacks well-defined parapodia or chaetae.…”

Section: Introductionmentioning

confidence: 99%

New insights into the morphology and evolution of the ventral pharynx and jaws in Histriobdellidae (Eunicida, Annelida)

et al. 2020

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The jaw apparatus in several annelid families represents a powerful tool for systematic approaches and evolutionary investigations. Nevertheless, for several taxa, this character complex has scarcely been investigated, and complete comparative analyses of all annelid jaws are lacking. In our comprehensive study, we described the fine structure of the jaw apparatus and the ventral pharyngeal organ (VPO) in Histriobdella homari – a minute ectocommensal of lobsters putatively belonging to the Eunicida – using different comparative morphological approaches, including SEM, TEM, CLSM and subsequent 3D reconstruction. The H. homari jaw apparatus is composed of ventral paired mandibles and dorsal symmetrical maxillae consisting of numerous dental plates, ventral carriers and an unpaired dorsal rod, and the general assemblage and arrangement of the different parts are highly comparable to those of other eunicid families. The jaw ultrastructure of histriobdellids resembles that of the families Dorvilleidae and (juvenile) Onuphidae. Furthermore, our data reveal that in the process of development of the jaw apparatus, the mandibles, maxillae II and unpaired dorsal rod are formed first, and the remaining maxillae and ventral carriers appear later. Notably, the muscular apparatus differs from that in Dorvilleidae and Onuphidae in terms of the number and arrangement of muscle fibers encompassing the jaws – not only because of the very small size of Histriobdella but also because histriobdellid maxillary protraction occurs due to straightening of the dorsal rod and thus requires a different muscular scaffold. Based on our investigations, the arrangement of the muscular apparatus of the jaws, the presence of paired ventral carriers and the dorsal rod, and the morphology of the ventral pharyngeal organ represent a histriobdellid autapomorphy. Our datasets form a basis for further comparative analyses to elucidate the evolution of Eunicida and jaw-bearing Annelida.

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A new species of Stratiodrilus (Polychaeta, Histriobdellidae) from freshwater crayfishes of southern Brazil

Cited by 6 publications

References 2 publications

The Current State of Eunicida (Annelida) Systematics and Biodiversity

The Current State of Eunicida (Annelida) Systematics and Biodiversity

Diseases of crayfish: A review

New insights into the morphology and evolution of the ventral pharynx and jaws in Histriobdellidae (Eunicida, Annelida)

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