scholarly journals Resolving the systematics of Richtersiidae by multilocus phylogeny and an integrative redescription of the nominal species for the genus Crenubiotus (Tardigrada)

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Daniel Stec ◽  
Matteo Vecchi ◽  
Wojciech Maciejowski ◽  
Łukasz Michalczyk
Keyword(s):  
Integrative Taxonomy ◽  
Nominal Species ◽  
28S Rrna ◽  
New Taxon ◽  
Unique Combination ◽  
Distinct Evolutionary Lineage ◽  
New Family ◽  
Phylogenetic Methods ◽  
The Family ◽  
Multilocus Phylogeny

Abstract The family Richtersiidae, although established recently with the use of phylogenetic methods, was considered potentially paraphyletic at the time of its erection. Until now, the family comprised four genera, Richtersius, Diaforobiotus, Adorybiotus and a newly erected genus Crenubiotus. However, the genetic characterisation for the latter two genera was very limited or absent. To address concerns about the phylogenetic affinity of these two genera, we present a multilocus phylogeny of the families Richtersiidae and Murrayidae based on four molecular markers (18S rRNA, 28S rRNA, ITS-2 and COI). Our results show a distinct evolutionary lineage composed of Adorybiotus and Crenubiotus, which is sister to Murrayidae. In order to accommodate the phylogenetic and morphological distinctiveness of this lineage, we erect a new family, Adorybiotidae fam. nov. The new taxon differs morphologically from other families in the superfamily Macrobiotoidea by a unique combination of traits: (1) the presence of tubercles/cushions with aggregations of microgranules on their surfaces present on all legs and on the dorso-caudal cuticle, (2) a system of internal septa in claws, and (3) buccal apparatus morphology. Moreover, in order to stabilise the taxonomy and nomenclature in the genus Crenubiotus, we redescribe its type species, Crenubiotus crenulatus, by means of integrative taxonomy and designate a new neotype based on a population from the original terra typica.

Diabloroter bolti, a short-bodied recumbirostran ‘microsaur’ from the Francis Creek Shale, Mazon Creek, Illinois

2019 ◽  
Vol 187 (2) ◽  
pp. 494-505 ◽  
Author(s):  
Arjan Mann ◽  
Hillary C Maddin
Keyword(s):  
New Genus ◽  
New Taxon ◽  
Evolutionary Trends ◽  
Unique Combination ◽  
Single Specimen ◽  
New Genus And Species ◽  
Taxonomic Assignment ◽  
Phylogenetic Methods ◽  
The Family ◽  
Mazon Creek

AbstractThe Carboniferous (Pennsylvanian; 309–307 Mya) ‘Mazon Creek’ Lagerstätte produces some of the earliest tetrapod fossils of major Palaeozoic lineages. Previously, the Mazon Creek record of ‘microsaurs’ was known from a single specimen. However, the lack of key anatomy, such as the skull, precluded a confident taxonomic assignment, thus only a suggested affinity to the microbrachimorph ‘microsaur’ Hyloplesion was determined. Recently several new tetrapod specimens collected from Mazon Creek have come to light, of which some have recumbirostran ‘microsaur’ affinity. Here we describe a new genus and species of short-bodied recumbirostran, Diabloroter bolti, on the basis of a unique combination of autapomorphies. Both parsimony and Bayesian phylogenetic methods recover the new taxon in the Brachystelechidae clade, as sister to a clade including Carrolla and Batropetes. We determine Diabloroter to be the earliest known member of Brachytelechidae and thus establishing a Carboniferous origin of the family. We also provide an updated diagnosis for Brachystelechidae. Finally, we comment on the evolutionary trends in the clade, including dental adaptations for a proposed algivorous diet in derived clade members.

An integrative redescription of Hypsibius dujardini (Doyère, 1840), the nominal taxon for Hypsibioidea (Tardigrada: Eutardigrada)

Zootaxa ◽  
2018 ◽  
Vol 4415 (1) ◽  
pp. 45 ◽  
Author(s):  
PIOTR GĄSIOREK ◽  
DANIEL STEC ◽  
WITOLD MOREK ◽  
ŁUKASZ MICHALCZYK
Keyword(s):  
Dna Sequences ◽  
Evolutionary Biology ◽  
Model Organism ◽  
Laboratory Strain ◽  
Sensu Stricto ◽  
Nominal Species ◽  
28S Rrna ◽  
The Family ◽  
The 19Th Century ◽  
Hypsibius Dujardini

A laboratory strain identified as “Hypsibius dujardini” is one of the best studied tardigrade strains: it is widely used as a model organism in a variety of research projects, ranging from developmental and evolutionary biology through physiology and anatomy to astrobiology. Hypsibius dujardini, originally described from the Île-de-France by Doyère in the first half of the 19th century, is now the nominal species for the superfamily Hypsibioidea. The species was traditionally considered cosmopolitan despite the fact that insufficient, old and sometimes contradictory descriptions and records prevented adequate delineations of similar Hypsibius species. As a consequence, H. dujardini appeared to occur globally, from Norway to Samoa. In this paper, we provide the first integrated taxonomic redescription of H. dujardini. In addition to classic imaging by light microscopy and a comprehensive morphometric dataset, we present scanning electron photomicrographs, and DNA sequences for three nuclear markers (18S rRNA, 28S rRNA, ITS-2) and one mitochondrial marker (COI) that are characterised by various mutation rates. The results of our study reveal that a commercially available strain that is maintained in many laboratories throughout the world, and assumed to represent H. dujardini sensu stricto, represents, in fact, a new species: H. exemplaris sp. nov. Redescribing the nominal taxon for Hypsibiidae, we also redefine the family and amend the definitions of the subfamily Hypsibiinae and the genus Hypsibius. Moreover, we transfer H. arcticus (Murray, 1907) and Hypsibius conifer Mihelčič, 1938 to the genus Ramazzottius since the species exhibit claws and eggs of the Ramazzottius type. Finally, we designate H. fuhrmanni as subjectively invalid because the extremely poor description precludes identifying neotype material. 

A revised phylogeny of the New Caledonian endemic genus Troglosiro (Opiliones : Cyphophthalmi : Troglosironidae) with the description of four new species

2021 ◽  
Author(s):  
Gonzalo Giribet ◽  
Caitlin M. Baker ◽  
Prashant P. Sharma
Keyword(s):  
New Species ◽  
Species Delimitation ◽  
Short Range ◽  
New Caledonia ◽  
28S Rrna ◽  
Direct Optimization ◽  
Biogeographic History ◽  
Phylogenetic Methods ◽  
The Family ◽  
History Of

The Cyphophthalmi genus Troglosiro (the only genus of the family Troglosironidae) is endemic to New Caledonia, representing one of the oldest lineages of this emerged part of Zealandia. Its species are short-range endemics, many known from single localities. Here we examined the phylogenetic relationships of Troglosironidae using standard Sanger-sequenced markers (nuclear 18S rRNA, 28S rRNA, and mitochondrial 16S rRNA and cytochrome c oxidase subunit I) and a combination of phylogenetic methods, including parsimony under Direct Optimization and maximum likelihood with static homology. We also applied a diversity of species delimitation methods, including distance-based, topology-based and unsupervised machine learning to evaluate previous species designations. Finally, we used a combination of genetic and morphological information to describe four new species – T. dogny sp. nov., T. pin sp. nov., T. pseudojuberthiei sp. nov. and T. sharmai sp. nov. – and discuss them in the broader context of the phylogeny and biogeographic history of the family. A key to the species of Troglosiro is also provided. urn:lsid:zoobank.org:pub:93541314-8309-468C-BB77-B34C3A81137E

scholarly journals A new genus and three new species of mangrove slugs from the Indo-West Pacific (Mollusca: Gastropoda: Euthyneura: Onchidiidae)

2019 ◽  
Author(s):  
Benoît Dayrat ◽  
Tricia C. Goulding ◽  
Munawar Khalil ◽  
Deepak Apte ◽  
Adam J. Bourke ◽  
...  
Keyword(s):  
Dna Sequences ◽  
New Genus ◽  
Comparative Anatomy ◽  
Integrative Taxonomy ◽  
Western India ◽  
New Taxon ◽  
West Pacific ◽  
Southeastern Australia ◽  
The Family ◽  
Three New Species

Mangroves of the Indo-West Pacific have remained poorly explored, so even the diversity of the onchidiid slugs, which are some of the most abundant animals in mangroves of the Indo-West Pacific, is not well known. Thanks to several years spent exploring mangroves in the Indo-West Pacific (more than 260 stations), especially in South-East Asia, the diversity of mangrove gastropods can now be addressed through revisions following an integrative taxonomy approach (nomenclature, field observations, comparative anatomy and DNA sequences). A new genus of onchidiid slugs is described, Paromoionchis Dayrat & Goulding gen. nov., which includes five species, three of which are new: Paromoionchis boholensis Dayrat & Goulding gen. et sp. nov., P. daemelii (Semper, 1880) com. nov., P. goslineri Dayrat & Goulding gen. et sp. nov., P. penangensis Dayrat & Goulding gen. et sp. nov. and P. tumidus (Semper, 1880) comb. nov. Paromoionchis gen. nov. is distributed from western India to the subtropical waters of Japan (33° N) and southeastern Australia (33° S). The creation of new taxon names is supported by rigorous nomenclature: the types of all existing species names in the family were examined, the original descriptions carefully studied and nomenclatural issues addressed. The diversity and biogeography of this new genus is discussed in a broader context.

An integrative study of some species of Gonaxia Vervoort, 1993 from off New Caledonia, with the establishment of Gonaxiidae as a new family of thecate hydroids (Cnidaria: Hydrozoa)

Zootaxa ◽  
2021 ◽  
Vol 5004 (3) ◽  
pp. 401-429
Author(s):  
HORIA R. GALEA ◽  
DAVIDE MAGGIONI
Keyword(s):  
Genetic Characterization ◽  
New Caledonia ◽  
Nominal Species ◽  
New Family ◽  
Deep Waters ◽  
The Family ◽  
Morphological Approach ◽  
Integrative Study ◽  
First Time

Ten species belonging to the genus Gonaxia Vervoort, 1993 occur in recent collections gathered by KANACONO (2016), KANADEEP (2017) and KANADEEP 2 (2019) expeditions of the French Tropical Deep-Sea Benthos Program in deep waters of the New Caledonian region. They were studied using the classical, morphological approach, supplemented by the first genetic characterization of the genus undertaken so far. Two species are previously undescribed, namely G. incisa Galea, sp. nov. and G. solenoscyphoides Galea, sp. nov. Additional notes on the remaining species are provided, notably the discovery of the female gonothecae of G. crassicaulis Vervoort, 1993 and G. perplexa Vervoort, 1993. Lofty colonies, with distinctive cladia-bearing branches spirally-arranged around the stem, assignable to the recently-described G. plumularioides Galea, 2016 actually represent fully-developed colonies of G. errans Vervoort, 1993, as demonstrated using molecular markers, the latter nominal species having priority. Its unusual, club-shaped, longitudinally-ridged gonothecae, fully free from the stem, are described for the first time. Supplementary notes on the hydrotheca of G. crassicaulis Vervoort, 1993 are provided, together with the description of a distinctive gutter of perisarc channeling the coenosarc of the colony along the lumen of both the stem and cladia. A multi-locus phylogenetic hypothesis of the Macrocolonia supports the establishment of the family Gonaxiidae Maggioni, fam. nov., to accommodate the species dealt with herein.

scholarly journals Analysis of Spounaviruses as a Case Study for the Overdue Reclassification of Tailed Phages

2019 ◽  
Vol 69 (1) ◽  
pp. 110-123 ◽  
Author(s):  
Jakub Barylski ◽  
François Enault ◽  
Bas E Dutilh ◽  
Margo BP Schuller ◽  
Robert A Edwards ◽  
...  
Keyword(s):  
Marker Gene ◽  
International Committee ◽  
New Taxon ◽  
New Family ◽  
Archaeal Viruses ◽  
Wide Range ◽  
The Family ◽  
Comprehensive Picture ◽  
Bacillus Phage

Abstract Tailed bacteriophages are the most abundant and diverse viruses in the world, with genome sizes ranging from 10 kbp to over 500 kbp. Yet, due to historical reasons, all this diversity is confined to a single virus order—Caudovirales, composed of just four families: Myoviridae, Siphoviridae, Podoviridae, and the newly created Ackermannviridae family. In recent years, this morphology-based classification scheme has started to crumble under the constant flood of phage sequences, revealing that tailed phages are even more genetically diverse than once thought. This prompted us, the Bacterial and Archaeal Viruses Subcommittee of the International Committee on Taxonomy of Viruses (ICTV), to consider overall reorganization of phage taxonomy. In this study, we used a wide range of complementary methods—including comparative genomics, core genome analysis, and marker gene phylogenetics—to show that the group of Bacillus phage SPO1-related viruses previously classified into the Spounavirinae subfamily, is clearly distinct from other members of the family Myoviridae and its diversity deserves the rank of an autonomous family. Thus, we removed this group from the Myoviridae family and created the family Herelleviridae—a new taxon of the same rank. In the process of the taxon evaluation, we explored the feasibility of different demarcation criteria and critically evaluated the usefulness of our methods for phage classification. The convergence of results, drawing a consistent and comprehensive picture of a new family with associated subfamilies, regardless of method, demonstrates that the tools applied here are particularly useful in phage taxonomy. We are convinced that creation of this novel family is a crucial milestone toward much-needed reclassification in the Caudovirales order.

Nomenclatural emendations (Cirripedia, Pedunculata) involving the family-group names Priscansermarinidae Newman, 1996, Neolepadinae Newman, 1996 & Zeugmatolepadidae Newman, 1996

Zootaxa ◽  
2004 ◽  
Vol 756 (1) ◽  
pp. 1 ◽  
Author(s):  
WILLIAM A. NEWMAN
Keyword(s):  
Family Group ◽  
The Other ◽  
International Commission ◽  
Zoological Nomenclature ◽  
New Taxon ◽  
Nomen Nudum ◽  
The Third ◽  
New Family ◽  
Other Hand ◽  
The Family

The family-group names Priscansermarinidae Newman, 1996, Zeugmatolepadidae Newman, 1996, and Neolepadinae Newman, 1996 were not accompanied by a description or definition when proposed, whereby, in light of Article 13.1.1 (International Commission on Zoological Nomenclature 1999), they are nomen nudum (Grygier in lit.). It is the purpose of this note to rectify this situation. To my knowledge the first two family-group names have not appeared in print since 1996 and therefore they are proposed anew herein, as Priscansermarinidae fam. nov. and Zeugmatolepadidae fam. nov. The third family-group, the subfamily Neolepadinae Newman, 1996, has since been recognized and variously defined by subsequent authors, including Buckeridge (2000) and Southward & Jones (2004), but since neither declare it a new taxon, in light of Article 16.1 it cannot be attributed to them. On the other hand, Yamaguchi et al. (2004) divided the included genera between two new family-groups, the tribes Neolepadini and Ashinkailepadini Yamaguchi, Newman & Hashimoto, 2004. Therefore, in accordance with Art. 36.1 (the Principle of Coordination), the Neolepadinae Yamaguchi, Newman & Hashimoto, 2004, as defined by Yamaguchi et al. (2004:111), is proposed, nom. trans., herein.

A new species of Dibamus (Squamata: Dibamidae) from Phnom Samkos Wildlife Sanctuary, southwestern Cardamom Mountains, Cambodia

Zootaxa ◽  
2011 ◽  
Vol 2828 (1) ◽  
pp. 58 ◽  
Author(s):  
THY NEANG ◽  
JEREMY HOLDEN ◽  
TOBY EASTOE ◽  
RATHEA SENG ◽  
SAVENG ITH ◽  
...  
Keyword(s):  
New Species ◽  
Unique Combination ◽  
Wildlife Sanctuary ◽  
Posterior Edge ◽  
New Family ◽  
The Family ◽  
A New Species

A new species of legless lizard, Dibamus dalaiensis sp. nov. of the family Dibamidae is described from Phnom Dalai in Phnom Samkos Wildlife Sanctuary, southwestern Cardamom Mountains, Cambodia, based on the following unique combination of characters: maximum SVL 127.6 mm; tail 18–22% of SVL; a single postocular scale; three scales bordering the posterior edge of first infralabial; an enlarged, medial, sublabial scale; labial and nasal sutures complete; rostral suture present but incomplete; 20 midbody scale rows; 22 scale rows just posterior to head and 20 scale rows just anterior to vent; 185–209 ventrals; and 48–52 subcaudal scales. The discovery of D. dalaiensis sp. nov. represents a new family, genus and species record for Cambodia.

Phylogenetic position of two Macrobiotus species with a revisional note on Macrobiotus sottilei Pilato, Kiosya, Lisi & Sabella, 2012 (Tardigrada: Eutardigrada: Macrobiotidae)

Zootaxa ◽  
2021 ◽  
Vol 4933 (1) ◽  
pp. 113-135
Author(s):  
YEVGEN KIOSYA ◽  
JUSTYNA POGWIZD ◽  
YELYZAVETA MATSKO ◽  
MATTEO VECCHI ◽  
DANIEL STEC
Keyword(s):  
Dna Sequences ◽  
Original Description ◽  
Integrative Taxonomy ◽  
Morphological Data ◽  
Phylogenetic Position ◽  
28S Rrna ◽  
Mitochondrial Coi ◽  
The Family ◽  
Electron Microscopy Analysis ◽  
Microscopy Analysis

In a moss and lichen sample collected on the Polish coast, a new population of Macrobiotus sottilei was found. Given that the original description of M. sottilei was based solely on the morphology observed under light microscopy and measurements of a few individuals, we provide, by means of integrative taxonomy, a revisional note on this species. We present a comprehensive set of morphometric and morphological data from light and scanning electron microscopy analysis together with nucleotide sequences of three nuclear (18S rRNA, 28S rRNA, ITS-2) and one mitochondrial (COI) DNA fragments. We also provide the same set of DNA sequences for Macrobiotus glebkai from a population recently found in Eastern Ukraine and elucidate the phylogenetic position of these two taxa within the family Macrobiotidae. Moreover, the terminology of cuticular bars in macrobiotid legs, and pillars within the egg chorion ornamentation in the Macrobiotus hufelandi morphogroup, are also discussed. 

Kotumsaridae, a new family of subterranean amphipod crustaceans from India, with description of Kotumsaria bastarensis, new genus, new species

Zootaxa ◽  
2007 ◽  
Vol 1589 (1) ◽  
pp. 33-46 ◽  
Author(s):  
MOHAMMED MESSOULI ◽  
JOHN R. HOLSINGER ◽  
Y. RANGA REDDY
Keyword(s):  
New Species ◽  
New Genus ◽  
Indian Subcontinent ◽  
Morphological Characters ◽  
New Taxon ◽  
New Genus And Species ◽  
The Third ◽  
New Family ◽  
The Family ◽  
Phylogenetic Affinities

Kotumsaridae, a new family of amphipod crustaceans is described from Kotumsar Cave in the state of Chhattisgarh, India. The family is based on Kotumsaria bastarensis, new genus and species, which is the only known member of the new family recorded to date. Although the new family appears to share some morphological characters with several other taxa from the southern hemisphere considered members of the superfamily Crangonyctoidea, including the New Zealand endemic genus Paracrangonyx, both its taxonomic and phylogenetic affinities remain unclear. Specimens of the new taxon, measuring just over 2 mm in length, were collected from the sediments of a pool in Kotumsar Cave but are believed to have migrated from deeper interstices. Kotumsaria bastarensis is only the third subterranean amphipod recorded to date from the Indian subcontinent.

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