Royal Belgian Institute of Natural Sciences, Rue Vautier 29, B-1000 Brussels, Belgium..
Siamensis Biodiversity Conservation Group, 408/144 Phaholyothin Place Building, 34th floor, Phaholyothin Rd., Phayathai, Bangkok, 10400, Thailand..
Zootaxa. 2021 May 12;4969(3):526538. doi: 10.11646/zootaxa.4969.3.5.
We describe Dixonius mekongensis sp. nov. from sandstone formations in Khong Chiam District, Ubon Ratchathani Province, in extreme eastern Thailand along the Laotian border. The new species differs from all currently recognized Dixonius by the following combination of morphological characters and pattern: maximal known snout-vent length of 51.2 mm; 16 longitudinal rows of dorsal tubercles; 32 to 34 paravertebral scales; 22 to 24 longitudinal rows of ventral scales across the abdomen; seven precloacal pores in males, no pores in females; a marked canthal stripe; and a spotted to uniform dorsal pattern. This description brings the number of Dixonius species to 13, with six species endemic to Thailand.
我们描述了来自泰国最东边老挝边境乌汶叻差他尼府孔尖县砂岩地层的湄公河邓氏鱼新种。新种与所有目前已知的邓氏鱼在以下形态特征和图案组合上有所不同：已知最大的吻肛长为 51.2 毫米；16 条纵向的背刺列；32 到 34 个椎骨鳞片；腹部有 22 到 24 条纵向的腹鳞列；雄性有 7 个前肛孔，雌性没有孔；明显的眼角条纹；以及有斑点到均匀的背部图案。这一描述使邓氏鱼的物种数量达到 13 种，其中 6 种是泰国特有的。
