Data from: Trilobites of Thailand’s Cambrian-Ordovician Tarutao Group

Tuff-bearing upper Cambrian–lowermost Ordovician strata on Ko Tarutao
(Tarutao Island) in Satun province, southernmost peninsular Thailand,
contain a rich trilobite fauna relevant to global biostratigraphy,
peri-Gondwanan palaeogeography, and shifting evolutionary mode. This area
of Sibumasu, a lower Palaeozoic marginal Gondwanan terrane, is shown to be
closely associated with Australia, North China (Sino-Korea), and other
continental fragments from the supercontinent’s northern equatorial sector
including South China. Shared fauna with Kazakhstan are also notable and
shared similiarities with Laurentia are of similar magnitude to those of
some other parts of equatorial Gondwana. Extensive collections from eight
different sections have yielded a number of newly-discovered taxa. With
the new taxa and revision of taxa known previously, we refine the age of
the upper formations of the Tarutao Group as the middle of Cambrian Stage
10 and lower Tremadocian. Newly described taxa include Tsinania
sirindhornae, Pseudokoldinioidia maneekuti, Pagodia? uhleini, Asaphellus
charoenmiti, Apatokephalus arcuatus, Yosimuraspis acufrons, Tarutaoia
techawani, Jiia talowaois, Caznaia imsamuti, Caznaia? undulata,
Lophosaukia nuchanongi, and Corbinia perforata. Taxa previouly unknown on
Tarutao but described from other terranes include Mansuyia orientalis?
Sun, Parakoldinioidia callosa Qian, Pseudagnostus Jaekel, Homagnostus
obesus Belt, Haniwa mucronata Shergold, H. sosanensis Kobayashi, Lichengia
simplex Shergold, Pacootasaukia Sohn and Choi, Wuhuia? Kobayashi,
Plethopeltella Kobayashi, Akoldinioida lata Park and Kihm, and
Koldinioidia choii Park and Kihm.