Middle Permian Ostracods from Tak Fa Limestone, Phetchabun Province, Central Thailand

A new Permian gastropod assemblage from the Roadian (Middle Permian) Khao Khad Formation, Saraburi Group (Lopburi Province, Central Thailand) which is part of the Indochina Terrane, has yielded one of the most diverse Permian gastropod faunas known from Thailand. A total of 44 gastropod species belonging to 30 genera are described herein, including thirteen new species and one new genus. The new genus is Altotomaria. The new species are Bellerophon erawanensis, Biarmeaspira mazaevi, Apachella thailandensis, Gosseletina microstriata, Worthenia humiligrada, Altotomaria reticulata, Yunnania inflata, Trachydomia suwanneeae, Trachyspira eleganta, Heterosubulites longusapertura, Platyzona gradata, Trypanocochlea lopburiensis and Streptacis? khaokhadensis. Most of the species in the studied assemblage represent vetigastropods (35.6%) and caenogastropods (26.7%) and most of the species belong to Late Palaeozoic cosmopolitan genera. The studied faunas come from shallow water carbonates that are rich in fusulinids, followed by gastropods, ostracods, bivalves and brachiopods. The gastropod assemblage from the Khao Khad Formation shares no species with the gastropod assemblages from other Permian formations in Thailand, the Tak Fa Limestone and the Ratburi Limestone. However, it is similar to the Late Permian gastropod faunas from South China of the Palaeo-Tethys, therefore it suggests that the Indochina Terrane was not located far from South China.

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Middle Permian productidine brachiopods from central Thailand (the Indochina Terrane) with paleobiogeographic implications

Journal of Paleontology ◽

10.1666/09-001.1 ◽

2009 ◽

Vol 83 (5) ◽

pp. 804-810 ◽

Cited By ~ 2

Author(s):

Masatoshi Sone ◽

Chongpan Chonglakmani ◽

Anisong Chitnarin

Keyword(s):

New Species ◽

Middle Permian ◽

Western Margin ◽

Central Thailand

Three productidine brachiopods ofHaydenella, Paraplicatifera,andCompressoproductusare recovered from the Tak Fa Formation (Wordian, Middle Permian) of the upper Saraburi Limestone Group exposed at Khao Wong of central Thailand (the western margin of the Indochina Terrane). The latter two genera are new to the Permian of Thailand, and the new speciesParaplicatifera thaicais proposed herewith. Some taxonomic and nomenclatural problems in relation to the three genera are discussed. The assemblage suggests endemism for a Middle Permian marine faunule of the Indochina Terrane.

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Diversity patterns of Middle Permian gastropod assemblages from the Tak Fa Formation, Central Thailand

Palaeobiodiversity and Palaeoenvironments ◽

10.1007/s12549-021-00482-3 ◽

2021 ◽

Author(s):

Chatchalerm Ketwetsuriya ◽

Imelda M. Hausmann ◽

Alexander Nützel

Keyword(s):

Marine Invertebrate ◽

Diversity Indices ◽

Taxonomic Composition ◽

Depositional Environments ◽

Middle Permian ◽

Late Triassic ◽

Diversity Gradient ◽

Cassian Formation ◽

Central Thailand ◽

Rank Abundance

AbstractMiddle Permian marine invertebrate assemblages from Central Thailand are strongly dominated by gastropods. Two gastropod assemblages from the Tak Fa Limestone at Khao Noi and Khao Chao Thong of the Nakhon Sawan area are the first Permian ones from Thailand that are analysed regarding diversity and composition based on quantitative data. Both gastropod assemblages, comprising 40 species in total, are dominated by the gastropods Anomphalus sp., Warthia cf. brevisinuata and Glabrocingulum magnum; the genus Anomphalus is especially abundant which is unusual for Permian assemblages. Both studied gastropod assemblages have a similar taxonomic composition and diversity including the same values of diversity indices that indicate a moderate diversity. In addition, rarefaction analyses and rank-abundance distributions also suggest that diversity and structure of both assemblages are the same. The studied assemblage is compared with other Permian gastropod assemblages from Asia (Malaysia, East Timor and Japan). Rarefaction, diversity indices and rank-abundance distributions suggest that the diversity of the studied fauna is distinctly lower than that of the others despite coming from similar depositional environments. This is surprising because the Tak Fa gastropods lived at lower latitudes than the others. This could suggest an inverse diversity gradient in the Palaeo-Tethys, but more evidence is needed to substantiate this assumption. Several Late Palaeozoic and Early Mesozoic fossil assemblages are dominated by gastropods, e.g. those from the Pennsylvanian Buckhorn Asphalt deposit, the Permian from Japan and Malaysia, as well as the Late Triassic Cassian Formation. This shows that at least locally, gastropod dominance is not restricted to modern faunas.

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Ostracods (Crustacea) of the Early-Middle Permian from Central Thailand (Indochina block). Part I. Order Palaeocopida

Geodiversitas ◽

10.5252/g2012n4a5 ◽

2012 ◽

Vol 34 (4) ◽

pp. 801-835 ◽

Cited By ~ 9

Author(s):

Anisong Chitnarin ◽

Sylvie Crasquin ◽

Thasinee Charoentitirat ◽

Prachya Tepnarong ◽

Nathawut Thanee

Keyword(s):

Middle Permian ◽

Central Thailand

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Thailandina and Neothailandina and their family Thailandinidae salvaged: a valid taxonomic group of peculiar Permian fusuline Foraminifera

Journal of Paleontology ◽

10.1017/jpa.2021.88 ◽

2021 ◽

pp. 1-6

Author(s):

Katsumi Ueno

Keyword(s):

Middle Permian ◽

Taxonomic Group ◽

New Genera ◽

Taxonomic Note ◽

Taxonomic Groups ◽

Central Thailand

The fusuline genera Thailandina Toriyama and Kanmera, 1968 and Neothailandina Toriyama and Kanmera, 1968 were established by Toriyama and Kanmera (1968) based on material from the Khao Phlong Phrab section of the Permian Rat Buri Limestone in central Thailand that is currently assigned to the Khao Khad Formation of the Saraburi Group (Ueno and Charoentitirat, 2011). These fusuline genera are peculiar in having parachomata and replaced tests by secondary mineralization. Moreover, Neothailandina was described to have a test with transverse septula, considered to be characteristic for Neoschwagerinidae. Based on these remarkable test features, Toriyama and Kanmera (1968) newly introduced the subfamily Thailandininae to accommodate these two new genera and assigned it to the Neoschwagerinidae, despite the lack of septula in Thailandina. Later, Kobayashi et al. (2010) argued that Thailandina and Neothailandina are just a mixed grouping of several known genera of schwagerinids, verbeekinids, and neoschwagerinids that are too altered by recrystallization to be recognizable, and rejected the taxonomic validity of these two genera as well as Thailandininae. The Khao Phlong Phrab section represents one of the standard late Cisuralian−Guadalupian (late early−middle Permian) fusuline successions in the eastern Paleotethys (Zhang and Wang, 2018) and contains not only Thailandina and Neothailandina but also abundant schwagerinid, verbeekinid, and neoschwagerinid fusulines (Toriyama, 1975; Fig. 1). I investigated the original specimens described by Toriyama and Kanmera (1968) and Toriyama (1975) from the section that are housed in the Department of Earth and Planetary Sciences of Kyushu University, Japan. I found that most of the grounds for Kobayashi et al.'s (2010) arguments to regard the thailandinin genera as taxonomically invalid are not supported by observations on these specimens as explained in the account that follows. In this taxonomic note, I propose that Thailandina and Neothailandina, and their family Thailandinidae, should be retained as valid taxonomic groups.

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Shallowing-Upward Sequence in a Late Middle-Permian (Midian) Alatoconchid-Bearing Strata, Khao Khwang Carbonate Platform, Central Thailand

First EAGE South-East Asia Regional Geology Workshop - Workshop on Palaeozoic Limestones of South-East Asia and South China ◽

10.3997/2214-4609.20144026 ◽

2011 ◽

Author(s):

Mongkol Udchachon

Keyword(s):

Carbonate Platform ◽

Middle Permian ◽

Central Thailand

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Middle Permian ostracod fauna from the Khao Khad Formation (Indochina Terrane), Central Thailand

Annales de Paléontologie ◽

10.1016/j.annpal.2021.102521 ◽

2021 ◽

Vol 107 (4) ◽

pp. 102521

Author(s):

Anisong Chitnarin ◽

Chatchalerm Ketwetsuriya

Keyword(s):

Middle Permian ◽

Central Thailand

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Fusiline foraminiferal biostratigraphy and carbonate facies of the Permian Ratburi Limestone, Saraburi, central Thailand

Journal of Micropalaeontology ◽

10.1144/jm.12.1.9 ◽

1993 ◽

Vol 12 (1) ◽

pp. 9-33 ◽

Cited By ~ 10

Author(s):

O. Dawson

Keyword(s):

Carbonate Platform ◽

Middle Permian ◽

Early Permian ◽

Phylogenetic Studies ◽

Platform Margin ◽

Algal Reef ◽

First Time ◽

Early Late ◽

Central Thailand ◽

Tectonic Movements

Abstract. A succession of Permian carbonates outcropping along the highway north of Saraburi, central Thailand, has yielded a prolific and diverse fusiline-algal assemblage of Early Permian (Sakmarian) to early Late Permian (Midian) age. Six major units representing dominantly carbonate platform environments are recognised: turbidite and basin slope deposits, a platform margin algal reef, a back reef, an interior platform with patch reefs, a protected lagoon inner platform, and supratidal, dolomitised algal mats. Archaeolithoporella and Tubiphytes form major reef frameworks analogous to those described from the Middle Permian reefs of Trogkofel (southern Austria) and El Capitan (western Texas). The associated dasycladacean floras are assignable to the Eastern Circum-Pacific Realm, whilst the fusiline fauna has Arctic-Tethyan affinities in the Early Permian and Tethyan affinities in the Middle Permian. Eight fusuline assemblage zones are recognised and the Robustoschwagerina-Nagatoella Zone, representing the Sakmarian (early Artinskian) stage, is recorded for the first time from central Thailand. Phylogenetic studies of the fusulines, coupled with an examination of the diagenetic fabrics and field observations, indicate the presence of an unconformity during the late Early Permian-early Middle Permian, which may be correlatable with a worldwide eustatic sea-level fall or may be due to local tectonic movements.

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