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Two new species of Aricidea (Aricidea) (Annelida: Paraonidae) from the Andaman coast and the Gulf of Thailand
(2026-07-03)
Plathong, Jintana
;
Plathong, Sakanan
;
Klangnurak, Wanlada
;
Ranauro, Natalia
;
Hernández-Alcantara, Pablo
Two new species of Paraonidae, Aricidea (Aricidea) pacharaphoni sp. nov., and A. (A.) sathingpra sp. nov., are described from the Southwestern Pacific. Aricidea (A.) pacharaphoni sp. nov., collected in the Andaman Coast and the Gulf of Thailand, is clearly distinguished from other species of Aricidea (Aricidea) by having an elongate, faintly annulated median antenna extending to chaetigers 3–7; chaetiger 3 with distinctive globose notopodial postchaetal lobes with long digitiform terminal tips; two types of branchiae, strap-like and foliaceous; and two types of modified neurochaetae, pseudocompound and stout acicular. Aricidea (A.) sathingpra sp. nov., was collected in the Gulf of Thailand and belongs to the articulated antenna group, being separated from all other species of this subgenus by having a triarticulated antenna; pair of distinctive round furrow protuberances on the prostomium; and 6–7 pairs of wide foliaceous branchiae. We suggested that the modification and shape of the notopodial postchaetal lobes in chaetiger 3 are an important morphological character to differentiate the species of this subgenus. Molecular phylogenetic and genetic distance analyses, based on cytochrome oxidase subunit I (COI) gene sequences support the recognition of Aricidea (A.) pacharaphoni sp. nov., as a distinct species. A taxonomic key for all world species of Aricidea (Aricidea) is included.
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Four new species of Fauveliopsidae (Annelida, Sedentaria) from the Gulf of Thailand
(2026-01-01)
Plathong, Jintana
;
Plathong, Sakanan
;
Klangnurak, Wanlada
;
Salazar-Vallejo, Sergio I.
Four new species of Fauveliopsidae, Fauveliopsis pladang sp. nov., Laubieriopsis tantawan sp. nov., Riseriopsis chaba sp. nov., and R. plahmuk sp. nov., are described from the Gulf of Thailand from sediments at 50–80 m water depth. Fauveliopsis pladang sp. nov., can be distinguished from other species by having 41 chaetigers; anterior parapodia with two acicula chaetae per bundle; in median and posterior segments 1 aciculum and 1 capillary per bundle. Laubieriopsis tantawan sp. nov., differs from all other species in the genus by having 27–43 chaetigers, body annulate; 2 acicula per bundle in anterior parapodia; in median and posterior parapodia with 1 aciculum and 1 capillary per bundle. Riseriopsis chaba sp. nov., can be distinguished from other species by having 34 chaetigers; anterior parapodia with 2 acicula per bundle; median and posterior notopodia with one aciculum and one capillary per bundle; median neuropodia with 1 aciculum and 2 capillaries per bundle; posterior neuropodia with 1–2 acicula and 1 capillary per bundle. Riseriopsis plahmuk sp. nov., can be distinguished from other species by having 2–4 acicula per bundle along anterior segments; median segments with 1–2 acicula and 1–2 capillaries per bundle; and posterior parapodia with 1–6 acicula and 1–5 capillaries per bundle. Genetic data, sequencing of the cytochrome oxidase subunit I (COI) of L. tantawan sp. nov., and R. plahmuk sp. nov., are reported. Update keys for identifying species of Fauveliopsis, Laubieriopsis and Riseriopsis are also provided.
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Two new species of Sigambra (Annelida, Pilargidae) from the Andaman coast and the Gulf of Thailand
(2024-12-17)
Plathong, Jintana
;
Plathong, Sakanan
;
Klangnurak, Wanlada
;
Dean, Harlan K.
Two species of Pilargidae, Sigambra pakbaraensis sp. nov. and S. sirilukae sp. nov. are described from different coasts of Southern Thailand (Andaman Sea and the Gulf of Thailand). Both species belong to the subgroup of Sigambra which lack ventral cirri at chaetiger 2 and have capillary notochaetae. Sigambra pakbaraensis sp. nov. is described from the Andaman coast and can be distinguished from other species in the genus by the occurrence of the first dorsal hook at chaetiger 8, the presence of capillaries in notopodia, and 14 pharyngeal papillae. Sigambra sirilukae sp. nov. is described from the Gulf of Thailand and it is clearly distinguished from all other species in the genus by having 12 pharynx papillae, an elongate median antenna with a large ceratophore, dorsal hooks from middle chaetigers, and up to five capillary notochaetae from anterior most chaetigers (4–5). Molecular phylogenetic analyses, based on cytochrome oxidase subunit I (COI) and mitochondrial genes 16S, indicate S. pakbaraensis sp. nov. clusters within Sigambra Müller, 1858. Pores on the dorsal and ventral cirri of both species are herein described for the first time for the genus. An updated key to species of Sigambra from the Indo-Pacific region is also provided.
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An Indo-Pacific coral spawning database
(2021-12-01)
Baird, Andrew H.
;
Guest, James R.
;
Edwards, Alasdair J.
;
Bauman, Andrew G.
;
Bouwmeester, Jessica
The discovery of multi-species synchronous spawning of scleractinian corals on the Great Barrier Reef in the 1980s stimulated an extraordinary effort to document spawning times in other parts of the globe. Unfortunately, most of these data remain unpublished which limits our understanding of regional and global reproductive patterns. The Coral Spawning Database (CSD) collates much of these disparate data into a single place. The CSD includes 6178 observations (3085 of which were unpublished) of the time or day of spawning for over 300 scleractinian species in 61 genera from 101 sites in the Indo-Pacific. The goal of the CSD is to provide open access to coral spawning data to accelerate our understanding of coral reproductive biology and to provide a baseline against which to evaluate any future changes in reproductive phenology.

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