taxonID	type	description	language	source
FA3CE18112B95E669613A8F6B7ABAADE.taxon	description	Figs 3, 4	en	Gusev, Evgeniy S., Ignatenko, Marina E., Martynenko, Nikita A., Tran, Hoan, Lituanas, Chris Rey, Podunay, Yulia A. (2025): A revision of the Mallomonas guttata species complex (Synurales, Chrysophyceae) based on morphological and molecular criteria. PhytoKeys 268: 103-127, DOI: 10.3897/phytokeys.268.178310
FA3CE18112B95E669613A8F6B7ABAADE.taxon	description	Description. Body scales are 3.2 – 4.1 × 1.9 – 2.4 μm, oval, tripartite, with a dome and a V-rib. The dome is completely or partially covered by papillae. Shield with densely and regularly spaced papillae arranged in distinct rows and 6 – 17 scattered circular pits. One rimmed base plate pore is situated in the proximal area of the shield lacking secondary siliceous layer at the base of the V-rib. The V-rib is conspicuous and rounded. Anterior flange is raised above the shield, covered with papillae. The posterior rim with a smooth surface, inner striation and encircles approximately half of the scale. Posterior flange is narrow and smooth. Apical scales are asymmetrical, 2.5 – 2.8 × 1.8 – 2.1 μm, possess a wing-like projection, and bear several circular pits on the shield. Rear scales are similar in basic structure to the body scales but smaller, 2.1 – 2.8 × 1.6 – 1.9 μm, and possess either a single or a few circular pits. Bristles are 4.0 – 7.3 μm smooth, curved, pointed.	en	Gusev, Evgeniy S., Ignatenko, Marina E., Martynenko, Nikita A., Tran, Hoan, Lituanas, Chris Rey, Podunay, Yulia A. (2025): A revision of the Mallomonas guttata species complex (Synurales, Chrysophyceae) based on morphological and molecular criteria. PhytoKeys 268: 103-127, DOI: 10.3897/phytokeys.268.178310
B55F9FC1D3DC55399874BB21D82579D4.taxon	description	Description. Body scales 3.5 – 5.6 × 2.0 – 3.3 μm, oval, tripartite, with a dome and a V-rib. The dome is completely or partially is covered by papillae. Shield with densely and regularly spaced papillae arranged in distinct rows and circular pits. The number of pits varies from 5 to 34, usually there are more than 10. Each pit is surrounded by a thickened rim. The pits can be located in transverse rows or scattered across the shield. One rimmed base plate pore is situated in the proximal area of the shield lacking secondary siliceous layer at the base of the V-rib. The V-rib is conspicuous and rounded. Anterior flange is raised above the shield, covered with papillae. The posterior rim with a smooth surface, inner striation and encircles approximately half of the scale. Posterior flange is smooth. Apical scales are asymmetrical, 2.8 – 4.7 × 2.0 – 3.0 µm, can possess a wing-like projection, and bear several circular pits on the shield. Rear scales are similar in basic structure to the body scales but smaller, 2.6 – 3.6 × 1.5 – 2.1 µm, and possess several circular pits. Bristles are 4.8 – 9.4 µm, smooth, curved, pointed. Cysts were not observed.	en	Gusev, Evgeniy S., Ignatenko, Marina E., Martynenko, Nikita A., Tran, Hoan, Lituanas, Chris Rey, Podunay, Yulia A. (2025): A revision of the Mallomonas guttata species complex (Synurales, Chrysophyceae) based on morphological and molecular criteria. PhytoKeys 268: 103-127, DOI: 10.3897/phytokeys.268.178310
B55F9FC1D3DC55399874BB21D82579D4.taxon	etymology	Etymology. The epithet “ monilifera ” reflects the characteristic arrangement of the shield pits, resembling a necklace.	en	Gusev, Evgeniy S., Ignatenko, Marina E., Martynenko, Nikita A., Tran, Hoan, Lituanas, Chris Rey, Podunay, Yulia A. (2025): A revision of the Mallomonas guttata species complex (Synurales, Chrysophyceae) based on morphological and molecular criteria. PhytoKeys 268: 103-127, DOI: 10.3897/phytokeys.268.178310
440AAEE6935A515FA00003649A08979E.taxon	description	Fig. 7	en	Gusev, Evgeniy S., Ignatenko, Marina E., Martynenko, Nikita A., Tran, Hoan, Lituanas, Chris Rey, Podunay, Yulia A. (2025): A revision of the Mallomonas guttata species complex (Synurales, Chrysophyceae) based on morphological and molecular criteria. PhytoKeys 268: 103-127, DOI: 10.3897/phytokeys.268.178310
440AAEE6935A515FA00003649A08979E.taxon	description	Description. Body scales 4.1 – 5.6 × 2.2 – 3.3 μm, oval, tripartite, with a dome and a V-rib. The dome is completely or partially covered by papillae. Shield with densely and regularly spaced papillae arranged in distinct rows and circular pits. The number of pits varies from 9 to 34, usually there are more than 10. Each pit is surrounded by a thickened rim. The pits can be located in transverse rows or scattered across the shield. One rimmed base plate pore is situated in the proximal area of the shield lacking secondary siliceous layer at the base of the V-rib. The V-rib is conspicuous and rounded. Anterior flange is raised above the shield, covered with papillae. The posterior rim with a smooth surface, inner striation and encircles approximately half of the scale. Posterior flange is smooth. Apical scales are asymmetrical, 3.3 – 4.7 × 2.2 – 3.0 µm, can possess a wing-like projection, and bear several circular pits on the shield. The rear scales are similar in structure to the body scales, but smaller, 3.2 – 3.6 × 1.5 – 2.1 µm, bear several circular pits. Bristles are 6.5 – 9.4 µm smooth, curved, pointed. Cysts were not observed.	en	Gusev, Evgeniy S., Ignatenko, Marina E., Martynenko, Nikita A., Tran, Hoan, Lituanas, Chris Rey, Podunay, Yulia A. (2025): A revision of the Mallomonas guttata species complex (Synurales, Chrysophyceae) based on morphological and molecular criteria. PhytoKeys 268: 103-127, DOI: 10.3897/phytokeys.268.178310
440AAEE6935A515FA00003649A08979E.taxon	etymology	Etymology. The specific epithet “ dongnaiensis ” refers to Dong Nai Province, Vietnam, the area where the type material was collected.	en	Gusev, Evgeniy S., Ignatenko, Marina E., Martynenko, Nikita A., Tran, Hoan, Lituanas, Chris Rey, Podunay, Yulia A. (2025): A revision of the Mallomonas guttata species complex (Synurales, Chrysophyceae) based on morphological and molecular criteria. PhytoKeys 268: 103-127, DOI: 10.3897/phytokeys.268.178310
440AAEE6935A515FA00003649A08979E.taxon	distribution	Distribution and ecology. In addition to the type locality, this subspecies has been observed in five more localities in Vietnam in Cat Tien National Park, Dong Nai Province (Tables 1, 2). Mallomonas monilifera subsp. dongnaiensis subsp. nov. was found under the following environmental conditions: pH 5.2 to 7.0, specific conductance of 8 to 72 µS cm - 1, and a temperature range of 29 – 36 ° C (Tables 1, 2).	en	Gusev, Evgeniy S., Ignatenko, Marina E., Martynenko, Nikita A., Tran, Hoan, Lituanas, Chris Rey, Podunay, Yulia A. (2025): A revision of the Mallomonas guttata species complex (Synurales, Chrysophyceae) based on morphological and molecular criteria. PhytoKeys 268: 103-127, DOI: 10.3897/phytokeys.268.178310
9D966A6A2EBD51548DF28616D17280AD.taxon	description	Figs 5, 6	en	Gusev, Evgeniy S., Ignatenko, Marina E., Martynenko, Nikita A., Tran, Hoan, Lituanas, Chris Rey, Podunay, Yulia A. (2025): A revision of the Mallomonas guttata species complex (Synurales, Chrysophyceae) based on morphological and molecular criteria. PhytoKeys 268: 103-127, DOI: 10.3897/phytokeys.268.178310
9D966A6A2EBD51548DF28616D17280AD.taxon	description	Description. Body scales 3.5 – 4.5 × 2.0 – 2.8 μm, oval, tripartite, with a dome and a V-rib. The dome is completely or partially is covered by papillae. Shield with densely and regularly spaced papillae arranged in distinct rows and circular pits. The number of pits varies from 7 to 27; usually there are more than 10. Each pit is surrounded by a thickened rim. The pits can be located in transverse rows or scattered across the shield. One rimmed base plate pore is situated in the proximal area of the shield lacking secondary siliceous layer at the base of the V-rib. The V-rib is conspicuous and rounded. Anterior flange is raised above the shield, covered with papillae. The posterior rim with a smooth surface, inner striation and encircles approximately half of the scale. Posterior flange is smooth. Apical scales are asymmetrical, 2.8 – 3.4 × 2.0 – 2.3 µm, can possess a wing-like projection, and bear several circular pits on the shield. Rear scales are similar in basic structure to the body scales but smaller, 2.6 – 3.2 × 1.6 – 2.1 µm, and possess several circular pits. Bristles are 4.8 – 7.3 µm, smooth, curved, pointed. Cysts were not observed.	en	Gusev, Evgeniy S., Ignatenko, Marina E., Martynenko, Nikita A., Tran, Hoan, Lituanas, Chris Rey, Podunay, Yulia A. (2025): A revision of the Mallomonas guttata species complex (Synurales, Chrysophyceae) based on morphological and molecular criteria. PhytoKeys 268: 103-127, DOI: 10.3897/phytokeys.268.178310
9D966A6A2EBD51548DF28616D17280AD.taxon	etymology	Etymology. The epithet “ monilifera ” reflects the characteristic arrangement of the shield pits, resembling a necklace.	en	Gusev, Evgeniy S., Ignatenko, Marina E., Martynenko, Nikita A., Tran, Hoan, Lituanas, Chris Rey, Podunay, Yulia A. (2025): A revision of the Mallomonas guttata species complex (Synurales, Chrysophyceae) based on morphological and molecular criteria. PhytoKeys 268: 103-127, DOI: 10.3897/phytokeys.268.178310
9D966A6A2EBD51548DF28616D17280AD.taxon	distribution	Distribution and ecology. In addition to the type locality, this subspecies has been observed in eight more localities in Vietnam and six localities in the Philippines (Tables 1, 2). Mallomonas monilifera subsp. monilifera subsp. nov. was found under the following environmental conditions: pH 5.0 to 7.1, specific conductance of 19 to 380 µS cm - 1, a temperature range of 24 – 31 ° C (Tables 1, 2).	en	Gusev, Evgeniy S., Ignatenko, Marina E., Martynenko, Nikita A., Tran, Hoan, Lituanas, Chris Rey, Podunay, Yulia A. (2025): A revision of the Mallomonas guttata species complex (Synurales, Chrysophyceae) based on morphological and molecular criteria. PhytoKeys 268: 103-127, DOI: 10.3897/phytokeys.268.178310
