The late Pliensbachian (Early Jurassic) ammonoid Amaltheus in Japan: systematics and biostratigraphic and paleobiogeographic significance

2021 ◽  
pp. 1-18
Author(s):  
Kentaro Nakada ◽  
Michiharu Goto ◽  
Christian Meister ◽  
Atsushi Matsuoka
Keyword(s):  
New Species ◽  
East Asian ◽  
Time Interval ◽  
Southwest Japan ◽  
Central Japan ◽  
Faunal Composition ◽  
Arctic Species ◽  
Taxonomic Analysis ◽  
Russian Region ◽  
Assemblage Zone

Abstract The genus Amaltheus, one of the representative late Pliensbachian ammonoids, has biostratigraphic and paleobiogeographic significance in Japan. Four species, Amaltheus stokesi (Sowerby, 1818), A. margaritatus de Montfort, 1808, A. repressus Dagis, 1976, and A. orientalis new species, have been found in the Kuruma Group in central Japan; A. stokesi and A. margaritatus are also from the Toyora Group in southwest Japan. On the basis of taxonomic analysis of the genus Amaltheus, we distinguish two successive ammonoid biozones in the lower part of the Teradani Formation of the Kuruma Group: the Amaltheus stokesi–Amaltheus repressus and the Amaltheus margaritatus assemblage zones, in stratigraphic ascending order. This study also establishes the presence of the Amaltheus stokesi Assemblage Zone in the Higashinagano Formation of the Toyora Group. The stokesi–repressus and the stokesi assemblage zones correspond biostratigraphically to the Amaltheus stokesi Standard Subzone of the margaritatus Zone. The margaritatus Assemblage Zone is correlated with the Amaltheus subnodosus and Amaltheus gibbosus standard subzones. The Japanese early–middle late Pliensbachian ammonoid faunas are composed almost entirely of pan-Boreal and Arctic species of the genus Amaltheus. This faunal composition has an affinity with that of the Northeast Russian region, and thus suggests a strong paleobiogeographic relationship between East Asian and Northeast Russian faunas throughout this time interval. UUID: http://zoobank.org/5F08121F-1DAF-4B24-BCBE-B08F7101CF29

Four new Burmese species of Hemiphyllodactylus Bleeker (Squamata: Gekkonidae) from distantly related parapatric clades from the Shan Plateau and Salween Basin

Zootaxa ◽  
2020 ◽  
Vol 4758 (1) ◽  
pp. 45-82 ◽  
Author(s):  
L. LEE GRISMER ◽  
PERRY L. JR. WOOD ◽  
EVAN S. H. QUAH ◽  
MYINT KYAW THURA ◽  
JAMIE R. OAKS ◽  
...  
Keyword(s):  
New Species ◽  
Cloud Forest ◽  
Mitochondrial Gene ◽  
Color Pattern ◽  
The South ◽  
Taxonomic Analysis ◽  
The North ◽  
North And South ◽  
Northwestern Thailand

An integrative taxonomic analysis based on morphology, color pattern, and the mitochondrial gene ND2 recovered four new species of Hemiphyllodactylus Bleeker that are endemic to the Shan Plateau or Salween Basin in eastern Myanmar. Hemiphyllodactylus ngwelwini sp. nov. from the Shan Plateau is part of the earlier described “eastern Myanmar clade” renamed herein as the north lineage and H. kyaiktiyoensis sp. nov. and H. pinlaungensis sp. nov. of the Shan Plateau and H. zwegabinensis sp. nov. of the Salween Basin compose an entirely new Burmese clade herein referred to as the south lineage. Although the north and south lineages come within 46 km of one another on the Shan Plateau, they are not sister lineages but sequentially separated by two lineages from Yunnan, China and another from northwestern Thailand. Hemiphyllodactylus zwegabinensis sp. nov. is the first species of this genus to be recorded from the Salween Basin and is known only from a wind-blown cloud forest on the top of the insular, karstic mountain Zwegabin in Kayin State. All other Burmese species except for H. typus, are endemic to the various localities throughout the Shan Plateau. These four new species bring the total number of Hemiphyllodactylus in Myanmar to at least 10 which is certainly an extreme underestimate of the diversity of this genus given that we discover new species at every upland locality we survey. 

A new species of the squat lobster genus Uroptychodes Baba, 2004 (Decapoda: Anomura: Chirostylidae) from Japan

Zootaxa ◽  
2021 ◽  
Vol 4966 (3) ◽  
pp. 349-358
Author(s):  
TOMOYUKI KOMAI
Keyword(s):  
New Species ◽  
Ovigerous Female ◽  
Identification Key ◽  
Key To Species ◽  
Central Japan ◽  
Squat Lobster ◽  
A New Species

A new species of the chirostylid squat lobster genus Uroptychodes Baba, 2004, U. fuscilineatus, is described and illustrated on the basis of a single ovigerous female from the Uraga Channel, central Japan, at depth of 250 m. The new species appears most similar to U. spinimarginatus (Henderson, 1885) and U. yapensis Dong, Gan & Li, 2021 among the 13 known congeners, but is notable in the pereopod 2 not being definitely more slender than the pereopods 3 and 4 and the remarkably spinose pereopods 1–4. A possible association of the new species with crinoid is suggested. An updated identification key to species of Uroptychodes is presented. 

A remarkable new species of Sinotilla Lelej (Hymenoptera: Mutillidae: Smicromyrmini) from Taiwan and an overview of color diversity in East Asian mutillid females

Zootaxa ◽  
2018 ◽  
Vol 4446 (3) ◽  
pp. 301
Author(s):  
JURIYA OKAYASU ◽  
KEVIN A. WILLIAMS ◽  
ARKADY S. LELEJ
Keyword(s):  
New Species ◽  
East Asian ◽  
Color Patterns ◽  
Lateral Margins ◽  
Far Eastern

A remarkable new species, Sinotilla nigrothoracica sp. nov., is described and illustrated based on females from Taiwan. This new species is characteristic in having indistinct hypostomal teeth and a black mesosoma with the lateral margins strongly convergent posteriorly. An overview of female color patterns in the far-eastern Palaearctic and eastern Oriental regions is also presented. 

A revision of the subgenus Leucandrena of the genus Andrena of eastern Asia (Hymenoptera: Apoidea: Andrenidae)

Zootaxa ◽  
2009 ◽  
Vol 2145 (1) ◽  
pp. 36-46
Author(s):  
HUANLI XU ◽  
OSAMU TADAUCHI
Keyword(s):  
New Species ◽  
East Asian ◽  
Eastern Asia ◽  
New Synonyms ◽  
Two New Species ◽  
First Time

The subgenus Leucandrena of the genus Andrena of eastern Asia is revised, and seven species are recognized. Two new species, Andrena (Leucandrena) paramelanospila and Andrena (Leucandrena) banchan are described from Beijing and Xizang (China) respectively, and the male of Andrena (Leucandrena) melanospila Cockerell is described for the first time. A. (Euandrena) taisetsusana Tadauchi et Hirashima, and A. (Andrena) dolharubang Tadauchi and Xu are recognized as new synonyms of the Holarctic A. barbilabris (Kirby). A key to East Asian Leucandrena is given.

scholarly journals Ashinkailepas kermadecensis, a new species of deep-sea scalpelliform barnacle (Thoracica: Eolepadidae) from the Kermadec Islands, southwest Pacific

Zootaxa ◽  
2009 ◽  
Vol 2021 (1) ◽  
pp. 57-65 ◽  
Author(s):  
JOHN S. BUCKERIDGE
Keyword(s):  
New Species ◽  
New Zealand ◽  
Deep Sea ◽  
Cold Water ◽  
The Other ◽  
Cold Seeps ◽  
Central Japan ◽  
Southwest Pacific ◽  
The North ◽  
A New Species

A new deep-sea stalked barnacle, Ashinkailepas kermadecensis sp. nov. has been recovered from a cold-water seep at depths of 1165 metres in the vicinity of the Kermadec Ridge to the northeast of the North Island, New Zealand. There are now two species of Ashinkailepas—the other, Ashinkailepas seepiophila Yamaguchi, Newman & Hashimoto, 2004, occurs in deep, cold seeps off central Japan. As there are two species within Ashinkailepas, formal diagnoses are provided for both taxa.

scholarly journals Anchialine biodiversity in the Turks and Caicos Islands: New discoveries and current faunal composition

2020 ◽  
Vol 49 (2) ◽  
pp. 71-86
Author(s):  
Brett Gonzalez ◽  
◽  
Alejandro Martínez ◽  
Jørgen Olesen ◽  
Sarit Truskey ◽  
...  
Keyword(s):  
New Species ◽  
Shallow Water ◽  
New Records ◽  
Invertebrate Fauna ◽  
Faunal Composition ◽  
Turks And Caicos Islands ◽  
New Findings ◽  
Faunal List ◽  
A New Species ◽  
Blue Holes

Lying at the southernmost point of the Lucayan Archipelago, the Turks and Caicos Islands are amongst the better studied localities for anchialine cave biodiversity. For nearly five decades, novel invertebrate fauna, comprised primarily of crustaceans, have been collected from these tidally influenced pools – but new findings are always on the horizon. Herein we present new records of crustaceans and annelids from anchialine blue holes and horizontal caves of the Turks and Caicos. These findings include two potentially new species of meiofaunal annelids and a new species of remipede collected from a shallow water cave pool. Our 2019 expedition additionally expands known faunal distributions for several taxa across the Caicos islands, and raises the biodiversity of the region to 35 species, 13 of them considered endemic. This is the first comprehensive faunal list for the anchialine systems in the Caicos Bank.

scholarly journals Agrotis fatidica (Hübner, 1824) species-group revisited, with description of two new species from the Alps and the Pyrenees (Lepidoptera, Noctuidae)

2018 ◽  
Vol 41 (1) ◽  
pp. 145-179
Author(s):  
László Ronkay ◽  
Peter Huemer
Keyword(s):  
New Species ◽  
Species Group ◽  
Northern Italy ◽  
European Species ◽  
Taxonomic Analysis ◽  
Two New Species ◽  
The Alps ◽  
Lepidoptera Noctuidae ◽  
European Populations ◽  
Isolated Species

An integrative taxonomic analysis of the European species of theAgrotisfatidicaspecies-group is presented with special reference to the European sister taxa ofA.fatidica(Hübner, 1824); in addition, a general overview of the entire species-group is given. The remarkable differences found in the barcodes of the Central and Western European populations ofA.fatidica(sensu lato) led us to recognise isolated species of theA.fatidicacomplex. Two new species,A.mayrorumsp. n.(Northern Italy and the French Alps) andA.mazelisp. n.(French Pyrenees) are described. The neotype ofA.fatidicais designated.Agrotisluehrivon Mentzer & Moberg, 1987 is treated as a subspecies ofA.fatidica(stat. n.).

Sign in / Sign up

Export Citation Format

Share Document