Fossil mackerel (Actinopterygii: Scombridae: Scomber) from the Neogene of South-Western Sakhalin, Russia

2014 ◽  
Vol 23 (1) ◽  
pp. 158-163 ◽  
Author(s):  
M.V. Nazarkin ◽  
A.F. Bannikov

The caudal part of a skeleton of mackerel Scomber sp. in the deposits of the Kurasi Formation of Middle-Upper Miocene of south-western Sakhalin Island is reported. It is the first finding of a fossil representative of the suborder Scombroidei in the Far East of Russia. The genus Scomber comprises 4 recent and about 10 fossil species from Oligocene to Pliocene of Europe, North America (California) and East Asia (Japan). Preservation of the material studied was not good enough to allow a detailed comparison of the Sakhalin mackerel with known both recent and extinct species of the genus.

2009 ◽  
Vol 83 (1) ◽  
pp. 89-109 ◽  
Author(s):  
James S. Crampton ◽  
Andy S. Gale

TheActinoceramus sulcatuslineage (Parkinson, 1819) (Bivalvia: Inoceramidae) is a very distinctive and abundant component of late Albian (Early Cretaceous) molluscan assemblages that is found throughout Europe, Central Asia, Japan and the Far East of Russia, southern and western North America, South Africa, and possibly India, in a range of shallow- to deep-marine facies. The lineage encompasses a wide and continuous range of morphologies that provide evidence of phyletic evolution at varying rates combined with large ecophenotypic plasticity within populations. The evolution ofA. sulcatusmarks the oldest appearance of well-developed radial folds and sulci within the Inoceramidae. The range of morphological variation makes formal taxonomic subdivision of the group problematic. Here we use a combination of formal successional subspecies and informal morphotypes to subdivide the lineage into the following taxa:A. sulcatusformasulcatus, A. sulcatusformasubsulcatus(Wiltshire, 1869),A. sulcatusformamunsoni(Cragin, 1894), andA. sulcatus biometricusCrampton, 1996. Within these taxa and morphotypes, we synonymise a large number of earlier names that have been applied to variants within the lineage. Each of the forms recognized has biostratigraphic utility and we describe four new lineage biozones, in ascending order:A. concentricus parabolicus, A. sulcatus, A. sulcatusformamunsoni, andA. sulcatus biometricusbiozones. The lowest occurrence ofA. sulcatusis approximately coincident with the base of the upper Albian as currently defined, at least throughout most of Europe, and this datum provides a valuable tool in correlation. The nature of radial folds within theA. sulcatuslineage poses interesting but still unanswered questions regarding shell morphogenesis in bivalves and the functional significance (if any) of radial folds in the Inoceramidae.


2011 ◽  
Vol 20 (1) ◽  
pp. 96-148 ◽  
Author(s):  
A.I. Khalaim

Tersilochines of South, Southeast and East Asia (excluding Mongolia and Japan) have been studied. Eight genera and 60 species are recorded in the region: Allophrys (2 species), Barycnemis (5 species), Diaparsis (29 species), Phradis (2 species, including 1 unidentified species), Probles (12 species, including 1 unidentified and 6 undescribed species), Sathropterus (2 species), Slonopotamus gen. nov. (2 species) and Tersilochus (6 species, including one species of the obscure status). One genus and 26 species are described as new: Allophrys bruneiensis sp. nov. (Brunei), A. occipitata sp. nov. (Vietnam, India), Diaparsis absista sp. nov. (Brunei), D. bannapeana sp. nov. (Laos), D. bolikhamsaica sp. nov. (Laos, Thailand), D. brunnea sp. nov. (Brunei), D. crenulator sp. nov. (Brunei), D. dediticia sp. nov. (Vietnam, Brunei), D. hilaris sp. nov. (Vietnam), D. karnatakana sp. nov. (India), D. labiensis sp. nov. (Brunei), D. mandibulator sp. nov. (Laos), D. minuta sp. nov. (Vietnam), D. monstrosa sp. nov. (Brunei), D. morleyi sp. nov. (Sri Lanka), D. propodeator sp. nov. (Brunei, Sarawak State of Malaysia, southern Indonesia, Laos), D. pulchra sp. nov. (South Korea), D. sarawakiensis sp. nov. (Sarawak and Pahang states of Malaysia), D. viela sp. nov. (Vietnam, Laos), D. vietnamica sp. nov. (Vietnam), D. zispina sp. nov. (Vietnam), Probles vietnamica sp. nov. (Vietnam, probably East China and south of Far East of Russia), Sathropterus secundus sp. nov. (Vietnam), Slonopotamus elephantoides sp. nov. (Laos), S. indianus sp. nov. (India) and Tersilochus granulatus sp. nov. (South Korea). Generic assignment of two species are changed: Barycnemis sanctijohanni (Rao & Kurian, 1951), new combination, and Probles (Microdiaparsis) caudate (Morley, 1913), new combination. Barycnemis dissimilis and B. tobiasi from Nepal, Diaparsis convexa from Vietnam, D. niphadoctona from Laos, and Sathropterus pumilus from India and Nepal are newly recorded from the countries. The genus Diaparsis comprises almost half of species of the tersilochine fauna of the studied region (29 species, 48%), and is a dominant genus in the Oriental Region. Keys to genera and species of Tersilochinae of South, Southeast and East Asia (excluding Mongolia and Japan) are provided.


10.22250/esfe ◽  
2020 ◽  
Author(s):  
V. A. YAKIMOVA ◽  
◽  
V.V. LAZAREVA ◽  
V.N. DYACHENKO ◽  
S.V. KHMURA ◽  
...  

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