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  1. Article ; Online: A new genus of japygids (Diplura: Japygidae) in mid-Cretaceous amber from northern Myanmar.

    Wang, Ye-Hao / Huang, DI-Ying / Cai, Chen-Yang

    Zootaxa

    2023  Volume 5396, Issue 1, Page(s) 64–73

    Abstract: Diplura is a cryptic and edaphic group of hexapod animals characterized by the presence of filiform or pincer-like cerci located at the end of the abdomen. As one of the early diverging lineages of Hexapoda, diplurans play a crucial role in unraveling ... ...

    Abstract Diplura is a cryptic and edaphic group of hexapod animals characterized by the presence of filiform or pincer-like cerci located at the end of the abdomen. As one of the early diverging lineages of Hexapoda, diplurans play a crucial role in unraveling the origin of the hyperdiverse insects. The fossil record of diplurans, however, is exceptionally limited due to their delicate bodies and habitat requirements. Here we report the discovery of a new japygid, Cretojapyx huangi gen. et sp. nov., entombed in mid-Cretaceous Kachin amber (northern Myanmar). This specimen exhibits distinctive features, including the well-developed carinae on abdominal segment X and cerci, left cercus lacking a prominent tooth and denticles, and right cercus with a postmedian tooth followed by uniseriate round denticles. Our finding provides a unique opportunity to gain valuable insights into the evolutionary history of this ancient lineage and deepen our understanding of terrestrial ecosystems during the Mesozoic.
    MeSH term(s) Animals ; Amber ; Dental Pulp Calcification ; Ecosystem ; Myanmar ; Insecta ; Fossils
    Chemical Substances Amber
    Language English
    Publishing date 2023-12-29
    Publishing country New Zealand
    Document type Journal Article
    ISSN 1175-5334
    ISSN (online) 1175-5334
    DOI 10.11646/zootaxa.5396.1.12
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Dynamics of microplastic transport and accumulation in a rural coastal area: Insights from the Otsuchi Bay, a small ria in Sanriku, Japan

    Wang, Yehao / Yamashita, Rei / Matsumura, Yoshimasa / Itō, Shin'ichi / Komatsu, Kosei

    Regional Studies in Marine Science. , p.102964-

    2023  , Page(s) 102964–

    Abstract: Microplastic (MP) pollution in coastal areas has received increasing attention recently. However, studies focused on MP pollution in rural coastal areas remain limited compared to those in metropolitan coastal areas. This study observed MP particles ... ...

    Abstract Microplastic (MP) pollution in coastal areas has received increasing attention recently. However, studies focused on MP pollution in rural coastal areas remain limited compared to those in metropolitan coastal areas. This study observed MP particles accumulated on the seafloor of the Otsuchi Bay, a small ria bay located on the Pacific coast, Sanriku, Japan. The MP concentrations in the sediment ranged from 2.6 ± 0.3 to 13.6 ± 9.8 pcs g−1 dry weight (DW) and 2.6 ± 1.4 to 5.1 ± 1.2 pcs g−1 DW in March and September 2021, respectively. No significant difference in MP concentrations was detected between March and September. The MP concentration in the Otsuchi Bay was lower than that observed in other highly populated coastal areas but was relatively high considering the population size of the catchment area. MP particles smaller than 1000μm were the most prevalent, accounting for 96.3% of all MP samples. MP size at the bay head was smaller than that at the central bay for high-density MPs; however, the relationship was reversed for low-density MPs. Analysis of the MP distribution pattern using a two-dimensional numerical model suggests that the horizontal distribution of MPs in the Otsuchi Bay depends on the size and density of MP particles. It is also strongly influenced by both the tidal oscillating currents characteristic to the bay and vertical terminal velocity of MP particles. Sedimented MP distributions in a bay with a small catchment population with limited MP sources shed light on our understanding of MP transport dynamics.
    Keywords Japan ; coasts ; marine science ; mathematical models ; microplastics ; pollution ; population size ; sediments ; terminal velocity ; watersheds ; Microplastic ; Seabed sediment ; Polymer type ; Rural coastal area ; Particle tracking model
    Language English
    Publishing place Elsevier B.V.
    Document type Article ; Online
    Note Pre-press version ; Use and reproduction
    ISSN 2352-4855
    DOI 10.1016/j.rsma.2023.102964
    Database NAL-Catalogue (AGRICOLA)

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  3. Article ; Online: New record of Epermenia (Calotripis) sinjovi Gaedike (Lepidoptera: Epermeniidae) in China: DNA barcode, adult, immature stages, host plant and biology.

    Wang, Yehao / Teng, Kaijian / Liu, Tengteng

    Zootaxa

    2021  Volume 5039, Issue 2, Page(s) 263–276

    Abstract: Epermenia (Calotripis) sinjovi Gaedike, 1993, feeding on Angelica pubescens Maxim. and A. ursina Maxim., was previously recorded in Russia (Far East, Southern Siberia and Transbaikalia), Kunashir Island and Japan. This species is for the first time ... ...

    Abstract Epermenia (Calotripis) sinjovi Gaedike, 1993, feeding on Angelica pubescens Maxim. and A. ursina Maxim., was previously recorded in Russia (Far East, Southern Siberia and Transbaikalia), Kunashir Island and Japan. This species is for the first time reported in China by rearing from a new host plant A. polymorpha Maxim. The larva and pupa are illustrated and described for the first time. Available biological information associated with the new host plant is also reported. Reference DNA barcodes are provided for E. (C.) sinjovi, which confirms that forewing distinct colors and morphological differences found in venation and genitalia among individuals are intraspecific variations. The adult morphological variations within population are analyzed and discussed.
    MeSH term(s) Animals ; Biology ; China ; DNA Barcoding, Taxonomic ; Moths/genetics ; Pupa
    Language English
    Publishing date 2021-09-15
    Publishing country New Zealand
    Document type Journal Article
    ISSN 1175-5334
    ISSN (online) 1175-5334
    DOI 10.11646/zootaxa.5039.2.7
    Database MEDical Literature Analysis and Retrieval System OnLINE

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