taxonID	type	description	language	source
038A096FFFB36A3DFF34F846FBEBECA5.taxon	materials_examined	Holotype: — Portion of a single gathering of cells on SEM stub number 68 _ I _ 1 deposited at the Herbarium of the Steppe Institute of the Ural Branch of the Russian Academy of Sciences, Orenburg (ORIS). Material from a pond in Phu Yen Province, Vietnam. Figure 3 is a representative scale from the type specimen. Type locality: — Vietnam: pond in Phu Yen Province, Dong Hoa District, Latitude / Longitude: N 12 ° 57.287 ’ E 109 ° 20.546 ’, 12 August 2024. Leg. E. S. Gusev.	en	Sterlyagova, Irina N., Ignatenko, Marina E., Lan, Nguyen Thi, Gusev, Evgeniy S. (2025): Mallomonas cetosa sp. nov. (Synurales, Chrysophyceae) - a new species from the tropics. Phytotaxa 720 (3): 281-288, DOI: 10.11646/phytotaxa.720.3.8, URL: https://doi.org/10.11646/phytotaxa.720.3.8
038A096FFFB36A3DFF34F846FBEBECA5.taxon	etymology	Etymology: — The epithet cetosa (Latin for ‘ whale’) was chosen due to the resemblance between the ribbed pattern on the posterior flange and baleen plates of whales.	en	Sterlyagova, Irina N., Ignatenko, Marina E., Lan, Nguyen Thi, Gusev, Evgeniy S. (2025): Mallomonas cetosa sp. nov. (Synurales, Chrysophyceae) - a new species from the tropics. Phytotaxa 720 (3): 281-288, DOI: 10.11646/phytotaxa.720.3.8, URL: https://doi.org/10.11646/phytotaxa.720.3.8
038A096FFFB36A3DFF34F846FBEBECA5.taxon	distribution	Distribution: — To date, Mallomonas cetosa has been observed in 33 localities in Vietnam (Table 1). The scales of M. cetosa have been previously reported under different taxonomic epithets from China, Indonesia, Malaysia, Jamaica, Madagascar, Philippines and France (see below).	en	Sterlyagova, Irina N., Ignatenko, Marina E., Lan, Nguyen Thi, Gusev, Evgeniy S. (2025): Mallomonas cetosa sp. nov. (Synurales, Chrysophyceae) - a new species from the tropics. Phytotaxa 720 (3): 281-288, DOI: 10.11646/phytotaxa.720.3.8, URL: https://doi.org/10.11646/phytotaxa.720.3.8
038A096FFFB36A3DFF34F846FBEBECA5.taxon	biology_ecology	Ecology: — Mallomonas cetosa was found under the following environmental conditions: pH 4.6 – 7.9, conductivity 10 – 666 µS / cm, temperature 22 – 39 ° C, and chlorophyll- “ a ” concentration 10 – 101 µg / L.	en	Sterlyagova, Irina N., Ignatenko, Marina E., Lan, Nguyen Thi, Gusev, Evgeniy S. (2025): Mallomonas cetosa sp. nov. (Synurales, Chrysophyceae) - a new species from the tropics. Phytotaxa 720 (3): 281-288, DOI: 10.11646/phytotaxa.720.3.8, URL: https://doi.org/10.11646/phytotaxa.720.3.8
