Elena Temereva

Elena Temereva
Lomonosov Moscow State University | MSU · Department of Invertebrates Zoology

Dr.Sc.

About

124
Publications
32,484
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
1,055
Citations
Additional affiliations
February 2003 - present
Lomonosov Moscow State University
Position
  • Leading scientific researcher
February 2002 - February 2003
Institute of Marine Biology
Position
  • Researcher

Publications

Publications (124)
Article
Since ctenostomes are traditionally regarded as an ancestral clade to some other bryozoan groups, the study of additional species may help to clarify questions on bryozoan evolution and phylogeny. One of these questions is the bryozoan lophophore evolution: whether it occurred through simplification or complication. The morphology and innervation o...
Article
Many data on echiurid anatomy and ultrastructure are obtained for Bonellia viridis and extrapolated to other species. The ultrastructure of the axial blood vessels, which has been described as an “osmotic pump”, is regarded as one of the unusual features of echiurids. In this study, the ultrastructure of the proboscis blood vessels in females of B....
Article
Full-text available
Although the lophophore is regarded as the main synapomorphy of all lophophorates, the evolution of the lophophore in certain groups of lophophorates remains unclear. To date, the innervation of the lophophore has been studied with modern methods only for three brachiopod species belonging to two subphyla: Linguliformea and Rhynchonelliformea. In t...
Article
The development and structure of the nervous system are traditionally used for phylogenetic analysis and reconstruction of evolutionary events. Phoronids are an unusual group of protostome animals whose organizational and developmental characteristics are similar to those of deuterostomes. This article presents a brief description of the developmen...
Article
Full-text available
Although Bonellia viridis is the best studied echiurid species, many features of its anatomy and ultrastructure are still unclear. Detailed data on the organisation of the proboscis may help us to understand the echiurid biology and some aspects of their feeding behaviour. In this study, a detailed description of the proboscis epithelium of females...
Article
Full-text available
The Oweniidae are marine annelids with many unusual features of organ system, development, morphology, and ultrastructure. Together with magelonids, oweniids have been placed within the Palaeoannelida, a sister group to all remaining annelids. The study of this group may increase our understanding of the early evolution of annelids (including their...
Article
Although the morphology of the brachiopod tentacle organ, the lophophore, is diverse, the organization of tentacles has traditionally been thought to be similar among brachiopods. We report here, however, that the structure of the tentacle muscles differs among brachiopod species representing three subphyla: Lingula anatina (Linguliformea: Linguloi...
Article
Full-text available
Background Many annelids, including well-studied species such as Platynereis , show similar structured segments along their body axis (homonomous segmentation). However, numerous annelid species diverge from this pattern and exhibit specialised segments or body regions (heteronomous segmentation). Recent phylogenomic studies and paleontological fin...
Article
Full-text available
The lophophore is a tentacle organ unique to the lophophorates. Recent research has revealed that the organization of the nervous and muscular systems of the lophophore is similar in phoronids, brachiopods, and bryozoans. At the same time, the evolution of the lophophore in certain lophophorates is still being debated. Innervation of the adult loph...
Preprint
Full-text available
The Oweniidae are marine annelids with many unusual features of organ system, development, morphology, and ultrastructure. Together with magelionds, oweniids have been placed within the Palaeoannelida, a sister group to all remaining annelids . The study of this group may increase our understanding of the early evolution of annelids (including thei...
Preprint
Full-text available
The lophophore is a tentacle organ unique to the lophophorates. Recent research has revealed that the organization of the nervous and muscular systems of the lophophore is similar in phoronids, brachiopods, and bryozoans. At the same time, the evolution of the lophophore in certain lophophorates is still being debated. Innervation of the lophophore...
Preprint
Full-text available
Background Many annelids, including well-studied species such as Platynereis , show similar structured segments along their body axis (homonomous segmentation). However, numerous annelid species diverge from this pattern and exhibit specialised segments or body regions (heteronomous segmentation). Recent phylogenomic studies and paleontological fin...
Article
Full-text available
The study of the anatomy and fine structure of Echiura is of great importance for understanding the biology of these animals, which lead a secretive life and dominate in various benthic communities. The first data on the organization of the siphonal part of the midgut of female Bonellia viridis were obtained by the methods of scanning and transmiss...
Article
The study of the lophophore organization is of great importance for the reconstruction of lophophorate phylogeny and for understanding the evolutionary transformation in each phylum of Lophophorata. The innervation of the lophophore in ctenostome bryozoan Flustrellidra hispida was studied using immunocytochemistry and confocal laser scanning micros...
Article
Brachiopoda is a relict phylum of marine benthic animals that have not been adequately studied with modern microscopy methods. Microscopic study may provide useful information on the evolution of the brachiopod body plan and brachiopod phylogeny. Understanding the organisation of the coelomic system is important because of its role in body form and...
Article
Echiura is small group of unsegmented marine worms that are sometimes abundant in the benthos of all areas of the World Ocean. The study of echiuran morphology and anatomy is important for understanding echiuran biology and the function of benthic communities where echiurans dominate. The current study used paraffin histology, scanning electron mic...
Article
Inferences on the development and morphology of extinct brachiopods must be informed by the ontogeny and shell ornamentation of extant brachiopods. Although the adult shells of extant brachiopods are well studied, detailed descriptions of the embryonic and juvenile shells of extant lingulides are lacking. Here, we describe in detail the shells of j...
Article
Inferences on the development and morphology of extinct brachiopods must be informed by the ontogeny and shell ornamentation of extant brachiopods. Although the adult shells of extant brachiopods are well studied, detailed descriptions of the embryonic and juvenile shells of extant lingulides are lacking. Here, we describe in detail the shells of j...
Article
Since the study of the neuroarchitecture has phylogenetic value, it is important to describe the nervous system in poor investigated groups. We describe the ultrastructure of the supraenteric and subenteric ganglia in the rhynchonelliform brachiopod Coptothyris grayi. We found that the supraenteric ganglion is a neuroepithelium that consists of mon...
Article
Full-text available
Phoronids are marine benthic animals that live in tubes in soft sediment or hard substrata; the phoronids form the tubes by digging or boring. Epidermal glands produce much of the material of the tube, which is completely imbedded in the soft sediment or hard substrata. The structure of phoronid tubes has not been previously studied in detail. In t...
Article
The structure of the lophophore nervous system may help clarify the status of the clade Lophophorata, whose monophyly is debated. In the current study, antibody labeling and confocal laser scanning microscopy revealed previously undescribed main nerve elements in the lophophore in adult phoronids: Phoronis australis and Phoronopsis harmeri. In both...
Article
Full-text available
The organization and development of the nervous system are traditionally used for phylogenetic analysis and may be useful for clarification of evolution and phylogeny of some poor studied groups. One of these groups is brachiopods: most data on their nervous system organization were obtained in 19th century. In this research, antibody staining and...
Article
The organization of the body cavities is an important morphological trait that can be used for establishing the phylogenetic relationships between different groups of animals. In the present study, the hemocoel and coelomic systems of 10‐hr‐old juveniles and adults of the hermaphroditic oikopleurid Oikopleura gracilis were examined using light and...
Article
Full-text available
Oweniidae is a basal group of recent annelids and nowadays it attracts the attention of researchers of many biological fields. Surprisingly, details of their anatomy, like the adult excretory system, remain obscure. Researchers recently suggested that the paired organs of tubeworms in the family Oweniidae are related to nephridia. In the current st...
Article
Confocal laser scanning microscopy was used to study the myoanatomy of the lophophore of three phoronids with different types of lophophore: Phoronis ijimai, Phoronis australis, and Phoronopsis harmeri. A four-part ground plan of the lophophoral musculature was detected in all three species and was previously reported for Phoronis ovalis. The groun...
Article
Full-text available
Background Entoprocta affinities within Lophotrochozoa remain unclear. In different studies, entoprocts are considered to be related to different groups, including Cycliophora, Bryozoa, Annelida, and Mollusca. The use of modern methods to study the neuroanatomy of Entoprocta should provide new information that may be useful for phylogenetic analysi...
Article
Full-text available
Larval development of the brachiopod Coptothyris grayi (Davidson, 1852) (Terebratulida: Rhynchonelliformea) is investigated with scanning electron microscopy and confocal laser scanning microscopy. At the early larval stage, the mantle rudiment forms obliquely to the anteroposterior axis of the larva: its dorsal side is located closer to the larval...
Article
The myoanatomy of adult phoronids has never been comprehensively studied by fluorescent staining and confocal laser scanning microscopy. Because the organization of the musculature may provide insight into phoronid biology and phylogeny, phoronid myoanatomy warrants detailed investigation. The current study provides the first description based on t...
Article
Molecular data indicate that brachiopods and phoronids form a clade Brachiozoa. In both groups, the lophophore consists of a brachial axis that bears a row of tentacles and does take different forms. Pelagodiscus atlanticus is a brachiopod with an unusual lophophore combining primitive (horseshoe-shaped brachial axis) and advanced (brachial axis fo...
Article
Full-text available
Introduction Among bryozoans, cyclostome anatomy is the least studied by modern methods. New data on the nervous system fill the gap in our knowledge and make morphological analysis much more fruitful to resolve some questions of bryozoan evolution and phylogeny. Results The nervous system of cyclostome Crisia eburnea was studied by transmission e...
Article
Full-text available
Phoronida is a phylum of marine invertebrates with a worldwide distribution. Currently, there are 14 species of phoronids in the world fauna, but this number may increase, based on the latest research. In the present study, the morphology and microanatomy of a new phoronid species, Phoronis savinkini sp. n., from the Gulf of Tonkin in the South Chi...
Article
Full-text available
The phylogeny of bryozoans is ambiguous and apparently cannot be resolved by molecular methods alone. Morphological data from previously unstudied species may help establishing relationships between the main groups of the Bryozoa and may help to clarify bryozoan phylogeny. The Cyclostomata is the least studied group of bryozoans. The nervous system...
Article
Details of spermatogenesis and sperm organization are often useful for reconstructing the phylogeny of closely related groups of invertebrates. Development in general and gametogenesis in particular usually differ in shallow water and deep‐sea invertebrates. Here, the spermatogenesis and ultrastructure of sperm were studied in the deep‐sea brachiop...
Article
Full-text available
Brachiopoda is a relict group of invertebrate filter feeders that used a tentacle organ, lophophore, for capturing food particles from the water column. Brachiopod extinction apparently occurred due to low productivity of their filtering organ in comparison with more advanced filter-feeders. Investigation of the filtering mechanism of modern brachi...
Article
Full-text available
The ultrastructure of the lophophoral coelomic lining in the articulate brachiopod Hemithiris psittacea was studied using electron microscopy and confocal laser scanning microscopy. The coelomic system of the lophophore consists of large and small canals; both extend along each brachium. A small coelomic canal gives rise to a blind coelomic canal i...
Article
Full-text available
Cytidine deaminases of the AID/APOBEC family catalyze C-to-U nucleotide transitions in mRNA or DNA. Members of the APOBEC3 branch are involved in antiviral defense, whereas AID contributes to diversification of antibody repertoires in jawed vertebrates via somatic hypermutation, gene conversion, and class switch recombination. In the extant jawless...
Article
Full-text available
Ultrastructural study of the excretory tree of vestimentifera Ridgeia piscesae has shown that it consists of tubules that are blind at their distal ends. The tubules are lined with ciliated cells and have one or two multiciliated terminal cell(s) at the distal ends. In the tubule walls, there are putative ultrafiltration sites. The excretory tree t...
Article
Full-text available
Background The nervous system in brachiopods has seldom been studied with modern methods. An understanding of lophophore innervation in adult brachiopods is useful for comparing the innervation of the same lophophore type among different brachiopods and can also help answer questions about the monophyly of the lophophorates. Although some brachiopo...
Article
Full-text available
Echiurida is a small group of marine benthic invertebrates burrowing in sediments and living a hidden lifestyle. Investigation into the morphology and anatomical features of various organ systems allows better understanding of biology of these enigmatic animals, many of which are deep-sea species. The morphology and microscopical anatomy of the dee...
Article
Full-text available
Microsporidia-like spores (2.0-3.0 x 1.3-1.5 μm) were discovered upon examination of histological sections taken from Phoronis embryolabi Temereva, Chichvarkhin 2017 found inhabiting burrows of shrimps Nihonotrypeae japonica (Decapoda, Callianassidae) from the Sea of Japan, Russia. Ultrastructural examination of spores revealed one nucleus and a un...
Article
Full-text available
The validity of the Lophophorata as a monophyletic group remains controversial. New data on the innervation of the lophophore, which is a unique feature of the lophophorates, may help clarify the status of the Lophophorata and provide new information on the early evolution of the group. In this paper, the organization of the nervous system of the l...
Article
Full-text available
The study of gametogenesis is useful for phylogenetic analysis and can also provide insight into the physiology and biology of species. This report describes oogenesis in the Phoronis embryolabi, a newly described species, which has an unusual type of development, that is, a viviparity of larvae. Phoronid oogonia are described here for the first ti...
Article
Full-text available
The Phoronida is a phylum of marine invertebrates with worldwide distribution. At present there are 14 species of phoronids in the world fauna, but this number may increase, based on the latest research. In the present study, the morphology and microscopical anatomy of a new phoronid species, Phoronis savinkini sp. n., from the Gulf of Tonkin in th...
Article
Nervous system organization differs greatly in larvae and adults of many species, but has nevertheless been traditionally used for phylogenetic studies. In phoronids, the organization of the larval nervous system depends on the type of development. With the goal of understanding the ground plan of the nervous system in phoronid larvae, the developm...
Article
Full-text available
The status of the Lophophorates is one of the central problems of current zoology. There is a contradiction between the molecular results, which mainly indicate the polyphyly of the lophophorates, and morphological results, which indicate the monophyly of the lophophorates. An understanding of lophophore innervation can help answer question about t...
Article
Full-text available
The organization of the coelomic system and the ultrastructure of the coelomic lining are used in phylogenetic analysis to establish the relationships between major taxa. Investigation of the anatomy and ultrastructure of the coelomic system in brachiopods, which are poorly studied, can provide answers to fundamental questions about the evolution o...
Article
Full-text available
The Phoronida, which is one of the smallest phyla of invertebrates, includes only 13 valid species, although ∼40 larval forms of phoronids were recently described. This report uses light microscopy and molecular methods to describe a new phoronid species, Phoronis embryolabi Temereva & Chichvarkhin, sp. nov. The morphology of P. embryolabi, which l...
Article
Full-text available
The larval development of the Brachiopod Coptothyris grayi (Davidson, 1852) from the Sea of Japan is described for the first time. Ciliated blastula proved to represent the first free-swimming stage. The blastopore is initially formed as a rounded hole stretching later along the anteroposterior axis. The larva is first divided into two lobes (the a...
Article
Full-text available
Background: The Bryozoa (=Ectoprocta) is a large group of bilaterians that exhibit great variability in the innervation of tentacles and in the organization of the cerebral ganglion. Investigations of bryozoans from different groups may contribute to the reconstruction of the bryozoan nervous system bauplan. A detailed investigation of the polypide...
Article
Full-text available
The Phoronida is a phylum of marine invertebrates that have a worldwide distribution and that form huge benthic aggregations in many aquatic areas. Although there are only 11 recognised species of phoronids, many species clearly remain to be described. The matching of larval and adult stages of the same species will help indicate which larvae belon...
Data
Full-text available
Article
Full-text available
Phoronida is a phylum of marine invertebrates, which have worldwide distribution and usually form huge benthic aggregations. The taxonomy of phoronids is still vague. In world fauna, there are 13 species of phoronids, but more than 40 larval “species” are described. The description of phoronid larvae and juxtaposition of larval and adult forms can...
Article
Full-text available
New type of phoronid development – viviparity of larvae – is discovered in new phoronid species, which lives as a commensal of digging sand shrimps in Vostok Bay, Sea of Japan. Embryos develop in the mother trunk coelom up to young larva stage. During development, embryos increase in size twice and probably obtain nutriment from mother coelomic flu...
Article
Full-text available
Background Phoronids undergo a remarkable metamorphosis, in which some parts of the larval body are consumed by the juvenile and the body plan completely changes. According to the only previous hypothesis concerning the evolution of the phoronid body plan, a hypothetical ancestor of phoronids inhabited a U-shaped burrow in soft sediment, where it...
Article
Full-text available
Lophophore innervation in the brachiopod Lingula anatina has been investigated using immuno� cytochemistry and laser confocal microscopy. Three prominent nerves, namely, the main brachial nerve, the accessory brachial nerve, and the lower brachial nerve, have been found to extend along each brachium of the lophophore. Tentacle innervation is also d...
Article
Full-text available
The Kamptozoa is a small group of invertebrates whose position on the phylogenetic tree of the Bilateria is still unclear. The relationship between kamptozoans and other bilaterians might be at least partially clarified by detailed morphological analysis. The cuticle has a distinctive structure in different groups of Bilateria, and its study is req...
Article
Full-text available
Evolutionary relationships among members of the Lophophorata remain unclear. Traditionally, the Lophophorata included three phyla: Brachiopoda, Bryozoa or Ectoprocta, and Phoronida. All species in these phyla have a lophophore, which is regarded as a homologous structure of the lophophorates. Because the organization of the nervous system has been...
Data
Full-text available
Article
Full-text available
The organization of the phoronid coelomic system has traditionally been regarded as similar to that of the deuterostomians, because both have three coelomic compartments: the proto-, meso-, and metacoel. Recent investigations, however, have revealed the presence of two coelomic compartments in specimens from the genus Phoronis and three in specimen...
Conference Paper
Full-text available
Phoronida is a small group of marine invertebrates, whose position among Bilateria was reappraised due to new data of molecular phylogeny. Although classical data of comparative anatomy and embryology evidence the position of phoronids among deuterostomes, new molecular analysis reveals their position among typical trochozoans. According to data of...