taxonID	type	description	language	source
FB1E879F4055D60150826329FE10FEF3.taxon	materials_examined	Holotype (here designated): — Portion of a single gathering of cells on SEM stub 55 _ I _ 2 deposited at the Herbarium of the Steppe Institute of the Ural Branch of the Russian Academy of Sciences, Orenburg (ORIS). Figure 9 is a representative scale from the type specimen. Type locality: — RUSSIA: Orenburg region, small unnamed ephemeral pool (“ Svetlinskii ” Biological Reserve). Latitude / Longitude: 51 ° 02 ′ 17.4 ″ N, 60 ° 47 ′ 15.0 ″ E, 03 May 2023. Leg. M. E. Ignatenko.	en	Ignatenko, Marina, Gusev, Evgeniy, Yatsenko-Stepanova, Tatyana (2025): Two new species of the genus Mallomonas (Chrysophyceae) from ephemeral pools in the steppe zone of the Southern Urals, Russia. Phytotaxa 705 (1): 86-96, DOI: 10.11646/phytotaxa.705.1.7, URL: https://doi.org/10.11646/phytotaxa.705.1.7
FB1E879F4055D60150826329FE10FEF3.taxon	etymology	Etymology: — The species is named in honor of Olga G. Kalmykova for her significant contribution to the study of the flora of the Southern Urals (Orenburg Region).	en	Ignatenko, Marina, Gusev, Evgeniy, Yatsenko-Stepanova, Tatyana (2025): Two new species of the genus Mallomonas (Chrysophyceae) from ephemeral pools in the steppe zone of the Southern Urals, Russia. Phytotaxa 705 (1): 86-96, DOI: 10.11646/phytotaxa.705.1.7, URL: https://doi.org/10.11646/phytotaxa.705.1.7
FB1E879F4055D60150826329FE10FEF3.taxon	distribution	Distribution: — In addition to the type locality, this species has been observed in four more localities in Russia: two small ephemeral pools (51 ° 02 ′ 19 ″ N, 60 ° 47 ′ 09 ″ E and 51 ° 02 ′ 18.0 ″ N, 60 ° 48 ′ 42.0 ″ E) and Lake Obalykol’ (50 ° 56 ′ 13.9 ″ N, 60 ° 44 ′ 59.9 ″ E) of the “ Svetlinskii ” Biological Reserve (Orenburg region, Svetlinskii district), and the ephemeral Lake Nezametnoye (51 ° 01 ′ 20.7 ″ N, 61 ° 13 ′ 29.9 ″ E) of the “ Orenburgskii ” State Nature Reserve.	en	Ignatenko, Marina, Gusev, Evgeniy, Yatsenko-Stepanova, Tatyana (2025): Two new species of the genus Mallomonas (Chrysophyceae) from ephemeral pools in the steppe zone of the Southern Urals, Russia. Phytotaxa 705 (1): 86-96, DOI: 10.11646/phytotaxa.705.1.7, URL: https://doi.org/10.11646/phytotaxa.705.1.7
FB1E879F4055D60150826329FE10FEF3.taxon	biology_ecology	Ecology: — The species has been recorded in small, shallow, ephemeral waterbodies at water temperatures of 12 – 14 ⁰ C and pH of 6.5 – 7.5.	en	Ignatenko, Marina, Gusev, Evgeniy, Yatsenko-Stepanova, Tatyana (2025): Two new species of the genus Mallomonas (Chrysophyceae) from ephemeral pools in the steppe zone of the Southern Urals, Russia. Phytotaxa 705 (1): 86-96, DOI: 10.11646/phytotaxa.705.1.7, URL: https://doi.org/10.11646/phytotaxa.705.1.7
FB1E879F4053D60050826189FE81F876.taxon	materials_examined	Holotype (here designated): — Portion of a single gathering of cells on SEM stub 54 _ I _ 2 deposited at the Herbarium of the Steppe Institute of the Ural Branch of the Russian Academy of Sciences, Orenburg (ORIS). Figure 25 is a representative scale from the type specimen. Type locality: — RUSSIA: Orenburg region, small unnamed ephemeral pond (“ Svetlinskii ” Biological Reserve). Latitude / Longitude: 51 ° 02 ′ 19 ″ N, 60 ° 47 ′ 09 ″ E, 03 May 2023. Leg. M. E. Ignatenko.	en	Ignatenko, Marina, Gusev, Evgeniy, Yatsenko-Stepanova, Tatyana (2025): Two new species of the genus Mallomonas (Chrysophyceae) from ephemeral pools in the steppe zone of the Southern Urals, Russia. Phytotaxa 705 (1): 86-96, DOI: 10.11646/phytotaxa.705.1.7, URL: https://doi.org/10.11646/phytotaxa.705.1.7
FB1E879F4053D60050826189FE81F876.taxon	etymology	Etymology: — The epithet “ prominentia ” (protrusion) refers to the characteristic elevation of the proximal part of the shield.	en	Ignatenko, Marina, Gusev, Evgeniy, Yatsenko-Stepanova, Tatyana (2025): Two new species of the genus Mallomonas (Chrysophyceae) from ephemeral pools in the steppe zone of the Southern Urals, Russia. Phytotaxa 705 (1): 86-96, DOI: 10.11646/phytotaxa.705.1.7, URL: https://doi.org/10.11646/phytotaxa.705.1.7
FB1E879F4053D60050826189FE81F876.taxon	distribution	Distribution: — This species was found in the type locality only.	en	Ignatenko, Marina, Gusev, Evgeniy, Yatsenko-Stepanova, Tatyana (2025): Two new species of the genus Mallomonas (Chrysophyceae) from ephemeral pools in the steppe zone of the Southern Urals, Russia. Phytotaxa 705 (1): 86-96, DOI: 10.11646/phytotaxa.705.1.7, URL: https://doi.org/10.11646/phytotaxa.705.1.7
FB1E879F4053D60050826189FE81F876.taxon	biology_ecology	Ecology: — The species has been observed in small shallow ephemeral pond at water temperatures of 14 – 20 ⁰ C and pH of 6.3 – 8.6.	en	Ignatenko, Marina, Gusev, Evgeniy, Yatsenko-Stepanova, Tatyana (2025): Two new species of the genus Mallomonas (Chrysophyceae) from ephemeral pools in the steppe zone of the Southern Urals, Russia. Phytotaxa 705 (1): 86-96, DOI: 10.11646/phytotaxa.705.1.7, URL: https://doi.org/10.11646/phytotaxa.705.1.7
