Untangling the Echiniscus Gordian knot: Stellariscus gen. nov. (Heterotardigrada : Echiniscidae) from Far East Asia

2018 ◽  
Vol 32 (5) ◽  
pp. 1234 ◽  
Author(s):  
Piotr Gąsiorek ◽  
Atsushi C. Suzuki ◽  
Reinhardt M. Kristensen ◽  
Dorota Lachowska-Cierlik ◽  
Łukasz Michalczyk
Keyword(s):  
Sexual Dimorphism ◽  
Quantitative Traits ◽  
New Genus ◽  
Morphological Variability ◽  
Far East ◽  
Dorsal Plate ◽  
Taxonomic Significance ◽  
Qualitative And Quantitative ◽  
The Family ◽  
Terrestrial Habitats

Species constituting the family Echiniscidae are highly derived, armoured and inhabit terrestrial habitats, in contrast to other heterotardigrades that are predominantly marine. The genus Echiniscus C.A.S. Schultze, 1840, nominal for the family Echiniscidae, is currently the most speciose tardigrade genus. However, the great morphological variability, in comparison with other heterotardigrade genera, suggests the polyphyletic character of the genus. Here, we analyse new specimens of Echiniscus pseudelegans Séméria, 1994 collected in Japan and conclude that the species as well as two other related taxa, E. elegans Richters, 1907 and E. latifasciatus Dudichev and Biserov, 2000, represent a new genus, Stellariscus, gen. nov. The new genus is characterised by a mixture of peculiar morphological apomorphies: black eyes, star-like dorsal plate sculpturing, no trunk appendages (only cephalic cirri present), two types of ventral plates, and striking sexual dimorphism in both qualitative and quantitative traits. Morphological phylogeny of the family Echiniscidae suggests a close affinity between Stellariscus, Hypechiniscus Thulin, 1928 and Pseudechiniscus Thulin, 1911. The polyphyletic status of both Echiniscus and Testechiniscus Kristensen, 1987 is also inferred. The taxonomic significance of ventral armature in echiniscid phylogeny and taxonomy is discussed.

Cassiavellia galtarae, new species, new genus: a new Permian bivalve and its significance for pterioidean systematics

2010 ◽  
Vol 84 (6) ◽  
pp. 1152-1176 ◽  
Author(s):  
Ilya Tëmkin ◽  
John Pojeta
Keyword(s):  
New Species ◽  
New Genus ◽  
Larval Shell ◽  
Upper Permian ◽  
Taxonomic Significance ◽  
New Genus And Species ◽  
The Family ◽  
Dental Ontogeny

An exceptionally well-preserved silicified bivalve from the Upper Permian of Texas is described and assigned to a new genus and species,Cassiavellia galtarae, placed in the family Bakevelliidae. The species represents one of the earliest and best characterized unequivocal occurrences of the multivincular ligament in the superfamily Pterioidea. The silicified material provides a wealth of information on the morphology of inadequately known Paleozoic pterioideans, including hitherto undescribed aspects of the larval shell, auricular sulcus, muscle scars, and dental ontogeny. The discovery of the condyle-fossa complex on the anteroventral shell margin, a feature previously undescibed in Bivalvia, raises the question of the homology and taxonomic significance of the problematic subumbonal ridge-like structures in Pterioidea. In life,C. galtaraewas probably an epifaunal right-pleurothetic bivalve, byssally attached to hard or raised flexible substrata. In addition toC. galtarae, another new species,C. nadkevnae, is placed inCassiavellia.

A revision of the Heatherellidae (Parasitiformes: Mesostigmata) with a new genus and two new species from Australasia

Zootaxa ◽  
2018 ◽  
Vol 4434 (3) ◽  
pp. 441
Author(s):  
OWEN D. SEEMAN ◽  
MARIA MINOR ◽  
MICHELLE R. BAKER ◽  
DAVID EVANS WALTER
Keyword(s):  
New Species ◽  
New Zealand ◽  
Sexual Dimorphism ◽  
New Genus ◽  
New South ◽  
New South Wales ◽  
The North ◽  
South Wales ◽  
The Family ◽  
Two New Species

The discovery of a new genus of Heatherellidae in New Zealand has led us to revise this enigmatic family and its constituent genera. Aheatherella n. gen., based on A. mira n. sp. from the North Island of New Zealand, lacks some of the derived character states that link the Australian Heatherella, most notably the lack of sexual dimorphism in the dorsal shields and in the presence of peritremes in adult Aheatherella. Heatherella osleri n. sp. is described from New South Wales, extending the distribution of this genus beyond Queensland. New collection records of H. callimaulos and a key to the genera and species of the family are provided. We propose that the Heatherellidae—previously placed in its own cohort outside the Gamasina—are best considered a superfamily of gamasine mites within the subcohort Epicriiae. 

Sagenidiopsis, A New Genus Of Byssoid Lichenized Fungi

1987 ◽  
Vol 19 (4) ◽  
pp. 401-408 ◽  
Author(s):  
R. W. Rogers ◽  
J. Hafellner
Keyword(s):  
New Genus ◽  
Lichenized Fungi ◽  
Taxonomic Significance ◽  
Eastern Australia ◽  
The Family ◽  
Cool Temperate ◽  
Family Level ◽  
Temperate Rainforests ◽  
Amyloid Structures

AbstractThe genus Sagenidiopsis gen. nov. of uncertain family in the order Opegraphales is erected for a byssoid lichen which occurs in the cool temperate rainforests of the Macpherson Range of eastern Australia, S. merrotsii sp. nov. The genus is characterized by its byssoid thallus and bitunicate asci which have no amyloid structures apparent in the tholus. A byssoid thallus is without taxonomic significance at the family level, but is an ecological key character.

Systematics and phylogeny of Cristacoxidae (Copepoda, Harpacticoida): a review

Zootaxa ◽  
2010 ◽  
Vol 2568 (1) ◽  
pp. 1 ◽  
Author(s):  
RONY HUYS ◽  
TERUE CRISTINA KIHARA
Keyword(s):  
Sexual Dimorphism ◽  
Type Species ◽  
New Genus ◽  
Sandy Beach ◽  
Sao Paulo ◽  
São Paulo ◽  
Paulo State ◽  
The Family ◽  
São Paulo State ◽  
A New Species

Both sexes of a new species of Noodtorthopsyllus Lang, 1965 (Harpacticoida, Cristacoxidae) from a sandy beach in São Paulo State (Brazil) are described using light and scanning electron microscopy. Noodtorthopsyllus tageae sp. nov. displays a mosaic of characters drawn from both Noodtorthopsyllus and Cristacoxa Huys, 1990, blurring the boundaries between both genera. Consequently, Cristacoxa, the type genus of the nominal family-group taxon Cristacoxidae Huys, 1990, is relegated to a junior subjective synonym of Noodtorthopsyllus, and its type species is transferred to the latter as N. petkovskii (Huys, 1990) comb. nov. A new genus Acuticoxa is proposed to accommodate A. ubatubaensis sp. nov. (type species), collected on the northern continental shelf of São Paulo State, and A. biarticulata sp. nov., previously identified as Laophontisochra sp., from the Northern Magellan Straits. Amended diagnoses are provided for Noodtorthopsyllus and Laophontisochra. Autapomorphies supporting the monophyly of the Cristacoxidae are re-evaluated, including new data on P3 endopod sexual dimorphism and caudal ramus development. It is concluded that a recently published hypothesis of a deeply rooted split of the family into two highly divergent lineages cannot be supported. Consequently, both Laophontisochra and Acuticoxa gen. nov. are removed from the Cristacoxidae and tentatively assigned to the Nannopodidae (ex Huntemanniidae), forming a clade with three other genera displaying coxal modifications on leg 1 (Rosacletodes Wells, 1985; Huntemannia Poppe, 1884; and an as yet undescribed genus from Brazil). Based on the sexual dimorphism of the P4 endopod, we propose to transfer Metahuntemannia Smirnov, 1946 and Pottekia Huys, 2009 from the Nannopodidae to the Canthocamptidae (subfamily Hemimesochrinae) where they are probably most closely related to Psammocamptus Mielke, 1975; Bathycamptus Huys & Thistle, 1989; Perucamptus Huys & Thistle, 1989; and Isthmiocaris George & Schminke, 2003. An identification key to the genera of the Nannopodidae is presented.

Diverse Texas beetles (Coleoptera: Elateroidea: Brachypsectridae) in mid-Cretaceous Burmese amber: sexual dimorphism and palaeoecology

2019 ◽  
Vol 2 (5) ◽  
pp. 523-531 ◽  
Author(s):  
ERIK TIHELKA ◽  
DIYING HUANG ◽  
CHENYANG CAI
Keyword(s):  
Sexual Dimorphism ◽  
Posterior Margin ◽  
New Genus ◽  
Distribution Range ◽  
Disjunct Distribution ◽  
Sexually Dimorphic ◽  
Fossil Species ◽  
Burmese Amber ◽  
The Family

Brachypsectridae is a species-poor elateroid family containing two extant genera with a disjunct distribution range spanning the Nearctic, Palaearctic, Oriental, and Australian regions. Here we describe a second Texas beetle from mid-Cretaceous Burmese amber, Hongipsectra electrella gen. et sp. nov. The new genus can be distinguished from all hitherto known brachypsectrids by the 11-segmented sexually dimorphic antennae with antennomeres 6–10 bilamellate in males and serrate in females, pronotum with a pair of posterolateral carinae and an M-shaped notch in the posterior margin for the reception of a cordiform scutellum. The present discovery adds a fourth genus and eleventh species to Brachypsectridae. Given that two of the known Texas beetle genera are from the Cretaceous Burmese amber, the family probably have been much more widespread and diverse in the Mesozoic than it is today. A key to the extant and fossil genera of Brachypsectridae is provided, along with a list of fossil species.

A new species and a new genus of Parabathynellidae (Crustacea, Syncarida) from South Korea

Zootaxa ◽  
2012 ◽  
Vol 3368 (1) ◽  
pp. 291 ◽  
Author(s):  
JONG-GEUN PARK ◽  
YE EUN
Keyword(s):  
New Species ◽  
South Korea ◽  
New Genus ◽  
Far East ◽  
Proximal Segment ◽  
The Far East ◽  
The Family ◽  
Ventral Edge ◽  
A New Species

Arisubathynella gen. nov. is established for a new species, A. cheongmiensis sp. nov. from South Korea. An illustrated description is given. The new genus stands out in the family Parabathynellidae by six-segmented antennules, three-segmented antenna without medial seta on inner margin of third segment, absence of mandibulartooth of the ventral edge, bare proximal segment of maxilla, two-segmented exopods of thoracopods II-VII, and male thoracopod VIII with elongated external lobe. Arisubathynella gen. nov. is the fourth genus known from South Korea and foreshadows the great diversity of bathynellaceans in the Far East.

Review of amphipods of the family Pleustidae Buchholz, 1874 (Crustacea: Amphipoda) from the coastal waters of Sakhalin Island (Far East of Russia). I. Subfamily Neopleustinae Bousfield & Hendrycks, 1994

Zootaxa ◽  
2021 ◽  
Vol 4974 (2) ◽  
pp. 267-306
Author(s):  
VJACHESLAV S. LABAY
Keyword(s):  
Coastal Waters ◽  
New Genus ◽  
Far East ◽  
Cladistic Analysis ◽  
Water Area ◽  
Sakhalin Island ◽  
Taxonomic Analysis ◽  
The Family ◽  
New Material ◽  
A New Species

Taxonomic analysis of the subfamily Neopleustinae Bousfield & Hendrycks, 1994, is performed. Cladistic analysis of morphological relationships within the genera Hendrycksopleustes gen. nov., Neopleustes Stebbing, 1906, and Shoemakeroides Hendrycks & Bousfield, 2004, is performed. A new genus Hendrycksopleustes gen. nov. is described. A review of the subfamily Neopleustinae from the shelf of Sakhalin Island and adjacent water area, based on all literature and own data, is provided. Based on new material, a new species Hendrycksopleustes neimanii sp. nov. is described from the shelf of Sakhalin Island. Status of the species Neopleustes euacanthus (G. Sars, 1877) is restored. New subspecies Neopleustes boecki pacifica ssp. nov. and Neopleustes pulchellus asiaticus ssp. nov. are described from the shelf of Sakhalin Island. Keys to the amphipod genera of the subfamily Neopleustinae and to the world species of the genera Neopleustes and Shoemakeroides are provided. 

scholarly journals Description of the family Padaungiellidae and morphological variability of Padaungiella lageniformis (Amoebozoides: Arcellinida) from the Vlasina Lake area, Serbia

2015 ◽  
Vol 67 (4) ◽  
pp. 1331-1337
Author(s):  
Stefan Luketa
Keyword(s):  
Morphological Variability ◽  
Testate Amoebae ◽  
Common Species ◽  
Lake Area ◽  
Qualitative And Quantitative ◽  
New Family ◽  
Quantitative Characters ◽  
Coefficients Of Variation ◽  
The Family ◽  
Aberrant Form

Based on theoretical conclusions, a new family of testate amoebae, Padaungiellidae, is described. It includes three genera: Alocodera, Apodera and Padaungiella. The most striking characteristic of the members of this family is an elongated neck, and absence of sets of teeth and septa along the oral-aboral axis on the inner side of the neck. The most common species of this family is Padaungiella lageniformis. Morphometrically, this species is not analyzed yet, so the qualitative and quantitative characters of a sphagnicolous population of P. lageniformis from the Vlasina Lake area (Serbia) are reported here. Quantitative characters were analyzed by univariate statistical methods. Coefficients of variation were moderately low for all the measured characters (range from 4.37 to 10.71%). Frequency distribution of only seven of sixteen variables showed approximately zero level of kurtosis, which indicated that specimens with average measurements were not predominant in the studied population. This paper provides evidence of the presence of an aberrant form of P. lageniformis.

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