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ウラヌス238
@_uranus238
川流不息
E & SE Asia
Joined July 2015
1.1K
Following
2.4K
Followers
3K
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Pinned Tweet
ウラヌス238
@_uranus238
over 3 years ago
海水面が12万年前の最終間氷期から2万年前の最終氷期まで上下しながらも下がっていき、その後現在まで一気に上昇した様子をアニメにしてみました。 こうした約10万年単位の周期的な変動を過去から繰り返してきたんでしょうね。
_uranus238's tweet video.
ウラヌス238
@_uranus238
7 days ago
@newt_jhuang
なるほど、北ルソンと台湾で自然分布集団が交流しているというシナリオが描けるわけですね(これだけでは天然の可能性が高いとまでは思いませんが)。仮に北ルソンが天然の場合、中ルソンの���のは北ルソンから分散してきて自然に湖で陸封しているという可能性はないですか?
ウラヌス238
@_uranus238
7 days ago
台湾にもR. koreensisがいるってコト??
Wei-Cheng Jhuang
@newt_jhuang
8 days ago
@yukiyalates
@rhinogobius1718
台湾では、陸封型の個体で尾びれに黄色いラインが入るものは比較的よく見られます。
ウラヌス238
@_uranus238
7 days ago
@newt_jhuang
天然だとする根拠は何でしょうか?
Who to follow
とりふぁ
@trifa3
理想は高く��識は低い、好きなことしかやりたくないわがままJK(理学博士)。川のサカナとエビとカニの自然史研究。CPK! に脳を焼かれ続けている。
西村
@kawanittan
日本淡水魚類愛護会、日本産カワニナ科図鑑、日淡こぼれ話の亜科。名前のわからない日淡は写真掲示板https://t.co/IloI9z5ZV3で同定します。
ビワタナゴ
@longipinnis
自分が死ぬまでにはイタセンパラを淀川のどこにでもいる魚にしたいな
ウラヌス238
@_uranus238
7 days ago
@newt_jhuang
ありがとうございます。similis種群全体でみて、mtDNAでは明瞭な地理的クラスターぽいのはないということですね。 ところでフィリピンは移入ではないですか?
ウラヌス238
@_uranus238
7 days ago
@Hyungbae_Jeon
@IchthyRightMan
thank you!!
ウラヌス238
@_uranus238
8 days ago
ヨシノボリニュース3 北朝鮮のルリヨシノボリ。 暗黒地帯のヨシノボリ相の一端が明らかに。
CM Han
@IchthyRightMan
9 days ago
My co-author and I examined the goby fauna of North Korea—a region that is now difficult to access—using specimens collected nearly 100 years ago. This was made possible thanks to the lead author’s exceptional expertise about Rhinogobius goby.
ウラヌス238
@_uranus238
8 days ago
ヨシノボリニュース2 韓国のゴクラクハゼがR. koreensisとして新種記載。 ただし済州島のだけは日本と同種R. similis。
Fish in the News
@FishInTheNews
9 days ago
#NewSpeciesAlert
- 𝑅ℎ𝑖𝑛𝑜𝑔𝑜𝑏𝑖𝑢𝑠 𝑘𝑜𝑟𝑒𝑒𝑛𝑠𝑖𝑠, a new species of paradise goby (Gobiidae), is described from the inland rivers of South Korea. 🔒 https://t.co/M77OPoE87X "While recent international taxonomic databases have synonymized several East Asian populations under 𝑅. 𝑠𝑖𝑚𝑖𝑙𝑖𝑠, our integrative analysis reveals that certain Korean populations are phenotypically and genetically distinct." 𝗥𝗲𝘀𝗲𝗮𝗿𝗰𝗵 𝗧𝗶𝘁𝗹𝗲 A New Species of the Paradise Goby (𝑅ℎ𝑖𝑛𝑜𝑔𝑜𝑏𝑖𝑢𝑠, Gobiidae) from Inland Freshwaters of Korea 𝗖𝗶𝘁𝗮𝘁𝗶𝗼𝗻 Moon, I.J., Yun, S.W. & Park, J.Y. A New Species of the Paradise Goby (𝑅ℎ𝑖𝑛𝑜𝑔𝑜𝑏𝑖𝑢𝑠, Gobiidae) from Inland Freshwaters of Korea. J. Ichthyol. (2026). https://t.co/oAaQTdYqTs 𝗔𝗯𝘀𝘁𝗿𝗮𝗰𝘁 Fishes of the genus 𝑅ℎ𝑖𝑛𝑜𝑔𝑜𝑏𝑖𝑢𝑠 are widely distributed across the Korean Peninsula, including inland freshwater systems and Jeju Island. While recent international taxonomic databases have synonymized several East Asian populations under 𝑅. 𝑠𝑖𝑚𝑖𝑙𝑖𝑠, our integrative analysis reveals that certain Korean populations are phenotypically and genetically distinct. Here, we describe these unique populations as a new species, 𝑅ℎ𝑖𝑛𝑜𝑔𝑜𝑏𝑖𝑢𝑠 𝑘𝑜𝑟𝑒𝑒𝑛𝑠𝑖𝑠 sp. nov. This species is distinguished from its congeners by a suite of morphological characteristics: a relatively small body size (approximately 40.0 mm standard length (SL)), adult males possessing broad yellow transverse stripes on the dorsal and caudal fins, and seven to eight reddish-brown longitudinal stripes on the caudal fin. Diagnostic features also include numerous yellow spots on the mid-lateral scales, several short transverse rows in row a, and a uniserial row in the posterior half of row c of the cutaneous sensory papillae on the cheek. Furthermore, 𝑅. 𝑘𝑜𝑟𝑒𝑒𝑛𝑠𝑖𝑠 is morphometrically distinguished from its closely related congeners by a narrower body width at the anal fin origin (13.0% SL), shorter pectoral fin (23.2% SL), longer caudal fin (24.7% SL), larger eye diameter (25.2% head length (HL)), narrow interorbital width (3.8% HL), and a shorter snout (31.0% HL). Phylogenetic analysis based on mitochondrial DNA confirms that the Korean 𝑅. 𝑘𝑜𝑟𝑒𝑒𝑛𝑠𝑖𝑠 population forms a robust, monophyletic clade distinct from those in Japan and China, supporting its recognition as a separate evolutionary unit despite low interspecific genetic distances. 𝗣𝗵𝗼𝘁𝗼 𝗖𝗿𝗲𝗱𝗶𝘁 Preserved specimens of 𝑅ℎ𝑖𝑛𝑜𝑔𝑜𝑏𝑖𝑢𝑠 𝑘𝑜𝑟𝑒𝑒𝑛𝑠𝑖𝑠, ( a ) male, ( b ) female. © 2026 the Author(s). Published in the Journal of Ichthyology. #NewSpecies #Ichthyology #Taxonomy #Biodiversity #AquariumHobby #Fishkeeping #Aquarist #TropicalFish #ParadiseGoby #Rhinogobius #Gobiidae #TeamGoby #Gobies #Korea #SouthKorea #Goby
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ウラヌス238
@_uranus238
8 days ago
ヨシノボリニュース1 四川のヨシノボリ新種。 szechuanensisの色違い。
Fish in the News
@FishInTheNews
10 days ago
#NewSpeciesAlert
- 𝑅ℎ𝑖𝑛𝑜𝑔𝑜𝑏𝑖𝑢𝑠 𝑚𝑒𝑛𝑔𝑦𝑎𝑛𝑔𝑒𝑛𝑠𝑖𝑠, a new species of river goby (Gobiidae) is described from the Tuojiang River and the Minjiang River, two tributaries of the Changjiang River, Sichuan Province, southwestern China. 🔓 https://t.co/hgopBPOKLl 𝑅ℎ𝑖𝑛𝑜𝑔𝑜𝑏𝑖𝑢𝑠 𝑚𝑒𝑛𝑔𝑦𝑎𝑛𝑔𝑒𝑛𝑠𝑖𝑠 occurs sympatrically with 𝑅ℎ𝑖𝑛𝑜𝑔𝑜𝑏𝑖𝑢𝑠 𝑠𝑧𝑒𝑐ℎ𝑢𝑎𝑛𝑒𝑛𝑠𝑖𝑠 in the Minjiang River basin, representing a sympatric sister-species pair. 𝗥𝗲𝘀𝗲𝗮𝗿𝗰𝗵 𝗧𝗶𝘁𝗹𝗲 𝑅ℎ𝑖𝑛𝑜𝑔𝑜𝑏��𝑢𝑠 𝑚𝑒𝑛𝑔𝑦𝑎𝑛𝑔𝑒𝑛𝑠𝑖𝑠: a new species of freshwater goby (Teleostei, Gobiidae) from Sichuan Province, southwestern China 𝗖𝗶𝘁𝗮𝘁𝗶𝗼𝗻 Liu X, Chen Z-G, Shu Y-F, Huang J-H, Liu K, Yu Y (2026) 𝑅ℎ𝑖𝑛𝑜𝑔𝑜𝑏𝑖𝑢𝑠 𝑚𝑒𝑛𝑔𝑦𝑎𝑛𝑔𝑒𝑛𝑠𝑖𝑠: a new species of freshwater goby (Teleostei, Gobiidae) from Sichuan Province, southwestern China. ZooKeys 1280: 333-347. https://t.co/pAMbeB0JU1 𝗔𝗯𝘀𝘁𝗿𝗮𝗰𝘁 A new species of freshwater goby, 𝑅ℎ𝑖𝑛𝑜𝑔𝑜𝑏𝑖𝑢𝑠 𝑚𝑒𝑛𝑔𝑦𝑎𝑛𝑔𝑒𝑛𝑠𝑖𝑠 sp. nov., is described from the upper Changjiang River basin in Sichuan Province, China, based on comparative morphology and molecular phylogeny. The new species is sister to 𝑅ℎ𝑖𝑛𝑜𝑔𝑜𝑏𝑖𝑢𝑠 𝑠𝑧𝑒𝑐ℎ𝑢𝑎𝑛𝑒𝑛𝑠𝑖𝑠 Tchang, 1939 and can be distinguished from its congeners by the following combination of characters: absence of sensory canals and pores on head; cheeks and operculum without spots or stripes; second dorsal fin with 9–11 longitudinal rows of inverted V-shaped or dash-like brown markings; incomplete brownish edges on flank scales below second dorsal fin; branchiostegal membrane bright yellow. 𝗘𝘁𝘆𝗺𝗼𝗹𝗼𝗴𝘆 The species is named after its type locality, Mengyang Town. The authors suggest 濛阳吻虾虎鱼 (méng yáng wěn xiā hǔ yú) as a Chinese vernacular name. 𝗣𝗵𝗼𝘁𝗼 𝗖𝗿𝗲𝗱𝗶𝘁 Top - 𝑅ℎ𝑖𝑛𝑜𝑔𝑜𝑏𝑖𝑢𝑠 𝑚𝑒𝑛𝑔𝑦𝑎𝑛𝑔𝑒𝑛𝑠𝑖𝑠 sp. nov. alive. A . Male, Tuojiang River basin (holotype, IHB 0202506006); B . Female, Tuojiang River basin (Paratype, IHB 0202506007); C . Male, Qingyijiang River basin; D . Female, Qingyijiang River basin. Bottom - Comparison of the colouration between 𝑅ℎ𝑖𝑛𝑜𝑔𝑜𝑏𝑖𝑢𝑠 𝑠𝑧𝑒𝑐ℎ𝑢𝑎𝑛𝑒𝑛𝑠𝑖𝑠 and 𝑅ℎ𝑖𝑛𝑜𝑔𝑜𝑏𝑖𝑢𝑠 𝑚𝑒𝑛𝑔𝑦𝑎𝑛𝑔𝑒𝑛𝑠𝑖𝑠 sp. nov. A. 𝑅ℎ𝑖𝑛𝑜𝑔𝑜𝑏𝑖𝑢𝑠 𝑠𝑧𝑒𝑐ℎ𝑢𝑎𝑛𝑒𝑛𝑠𝑖𝑠; B. 𝑅ℎ𝑖𝑛𝑜𝑔𝑜𝑏𝑖𝑢𝑠 𝑚𝑒𝑛𝑔𝑦𝑎𝑛𝑔𝑒𝑛𝑠𝑖𝑠 sp. nov. © 2026 the Author(s). Published in the journal ZooKeys. This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International (CC-BY-4.0) licence. https://t.co/5IYEkz4Rwi #NewSpecies #Ichthyology #Taxonomy #Biodiversity #AquariumHobby #Fishkeeping #Aquarist #TropicalFish #Rhinogobius #TeamGoby #FreshwaterGobies #Gobies #Goby #China #ChangjiangRiver #SichuanProvince #Gobiidae
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ウラヌス238
@_uranus238
6 months ago
@wormanago
日本在来ドジョウはアムールホソ��ジョウではなかったんですね!?良かったです〜
ウラヌス238
@_uranus238
7 months ago
@wataka_1883
草
ウラヌス238
@_uranus238
7 months ago
これはやはりクロヨシノボリだった。 一方でオオヨシノボリR. fluviatilisぽい写真は見たことない。 どちらかというと中国との共通種がいないのだろうかと気になっている。
ウラヌス238
@_uranus238
almost 3 years ago
韓国にクロヨ��ノボリはいないんちゃうかと思ってたけど、それっぽい画像見つけてしまった...
ウラヌス238
@_uranus238
7 months ago
韓国のクロヨシノボリ。 This is the TRUE R. brunneus. Extremely limited distribution in Korea.
CM Han
@IchthyRightMan
7 months ago
韓国でのbrunneusの初記録論文が出た。 出ているのは知ってたけど… https://t.co/zuxsv6dMft
ウラヌス238
@_uranus238
7 months ago
@9255GOBI
@dimtaktica
@trachidermus
@masumura0722
最初の投稿のものはルリとオオに見えます。
ウラヌス238
@_uranus238
11 months ago
@dimtaktica
たしかにそれはクロの特徴で、ルリでは鞍状斑などがより目立つので、こういう特徴がでる印象はないですね。ただ、体色によってはこんな模様もみえたりするかなと思いました。全体的な体色と鰭の色でルリっぽいなと思いました。また、��鰭に縞模様がみえないのでクロではないのではと思いました。
ウラヌス238
@_uranus238
12 months ago
アブラハヤゲノム T2T! https://t.co/sfEQXbVEMK
ウラヌス238
@_uranus238
12 months ago
@IchthyRightMan
です
ウラヌス238
@_uranus238
12 months ago
これは未記載種っぽい耽津江のもの。 たしかに斑紋が特殊だ。
ウラヌス238
@_uranus238
12 months ago
https://t.co/msUq5cUNVj Iksookimia longicorpaとI. hugowolfeldiは遺伝的分化がかなり小さく、後者は前者のシノニムではないか。さらにこれらとより分化した集団があり、未記載種ぽい...とのこと。
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