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On several new or poorly-known Oriental Paradoxosomatidae (Diplopoda: Polydesmida), XXX
... Tylopus is considered the most species-rich genus within the family Paradoxosomatidae Daday, 1889. Currently, it contains 77 species (Golovatch and Semenyuk 2021;Likhitrakarn et al. 2021;Sierwald and Spelda 2021) distributed from Southern China down to Indonesia and Malaysia, and from Myanmar to Vietnam. They are seemingly dominant in Southeast Asia, especially in Thailand, Laos, and Vietnam, although this may be due to research bias. ...
A conspicuous Tylopus species is described from Northern Vietnam, namely T. helicorthomorphoides sp. nov. The new species is clearly diagnosed by the gonopodal solenophore completely sheathing the solenomere, both being coiled three times, and the absence of spine z and process h of the gonopod. Fragments of the COI and 16S rRNA genes were extracted, and the phylogenetic analysis also supports the new species.
The millipede genus Kronopolites Attems, 1914 was originally described by monotypy with Strongylosoma swinhoei Pocock, 1895 as the type species, which was based on a single female specimen. Although this species has been believed to be widespread in China, there have been no confirmed reports of it from its type locality, leading to uncertainty about its taxonomic status. To address this issue, we newly sampled specimens from its type locality in Zhifu, Shandong Province, China. Our morphological analysis suggests that Kronopolites swinhoei (Pocock, 1895) should be reclassified as Nedyopus swinhoei (Pocock, 1895) comb. nov. and is a senior synonym of Nedyopus patrioticus Attems, 1898, syn. nov. The results also support the recovery of the name Kronopolites svenhedini (Verhoeff, 1934) sp. reval. , which was previously misidentified as a junior synonym under K. swinhoei . The former is now the genus type of Kronopolites .
Thailand, a relatively small country in Southeast Asia, is outstanding in biodiversity owing to three zoogeographic regions overlapping there: the Sino-Himalayan, the Indo-Chinese, and the Sundaic ones. Based on all available published records until 2022, an updated checklist of the millipedes (Diplopoda) of Thailand presently comprises 263 species belonging to 54 genera, 17 families, and nine orders. No less than 222 of these species are endemic to subendemic to Thailand, with only eight being synanthropic and up to subcosmopolitan in distribution. Since the previous checklist in 2005, the fauna has gained 144 species described as new to science, as well as a further 20 representing new country records. This steep progress has largely become possible through the activities of the Animal Systematics Research Unit of Chulalongkorn University, a zealous team of young researchers organized and led by Professor Dr. Somsak Panha. The present full-scale catalogue of the Thai millipedes seems to be particularly topical as a certain landmark, however temporary, not only because of the very considerable time elapsed since the previous, strongly outdated, 2005 catalogue, but also on the occasion of the 65th birthday of Professor Panha, the leader of invertebrate taxonomic research in Thailand.
The paradoxosomatid genus Touranella Attems, 1937 is recorded from Laos for the first time, with a new species, Touranella champasak sp. nov., described here. The taxonomy of the genus is discussed, an identification key is provided, and the current distribution of all species is mapped.
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