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Saturday, July 26th, 2025
| Time | Event | ||||||
| 2:37a | [Botany • 2024] Dorcoceras uthongensis (Gesneriaceae) • A New Species from the Limestone Karst of Suphan Buri, Thailand
Abstract Dorcoceras uthongensis, a new species of the genus Dorcoceras Bunge, is described. This new species is endemic to Uthong district, Suphan Buri province, Thailand, and differs from the other species by exhibiting capitate glandular hairs with globose unicellular head on the abaxial surface of the leaf. Additionally, it is classified as an endangered species (EN) according to IUCN criteria. The phylogenetic analysis based on nuclear ITS1-5.8S-ITS2 confirmed its placement within Dorcoceras. Moreover, we sought to explore the potential biological activities of the crude extract of this new species. We evaluated the aqueous extract of leaves which revealed antioxidant activity and no cytotoxicity indicating potential safety for further research and utilization. To examine the phytochemical composition, we performed an analysis using LC-MS/MS-QTOF. The result revealed the presence of flavonoids, alkaloids, phenolic compounds, and terpenes. Keywords: Dorcoceras, New species, Trichome, Biological activity, Phytochemical composition, LC-MS/MS-QTOF
Dorcoceras uthongensis Prajanban, Patumchartpat & Panvilai, sp. nov. DIAGNOSIS: Dorcoceras uthongensis is similar to D. geoffrayi and D. wallichii in colorless indumentum on the abaxial leaf surface but consisting of capitate glandular hairs with globose unicellular head (absent in D. geoffrayi and D. wallichii), as shown in Figure 5. Moreover, the sessile glandular trichomes observed in D. wallichii are absent in D. uthongensis. Also similar to D. brunneum in the leaf shape (Figure 4) but differing in the colorless indumentum abaxially (rusty brown in D. brunneum). The stigma of D. uthongensis is pale pink bilabiate, which is only found in this new species (Figure 3). Jaran Prajanban, Wichai Patumchartpat, Radeekorn Akkarawongsapat, Chanita Napaswad, Sathit Panvilai. 2024. Phytochemical Composition and Biological Activities of Dorcoceras uthongensis (Gesneriaceae) - A New Species from the Limestone Karst of Suphan Buri, Thailand. Journal of Phytology. 16, 231–238. DOI: doi.org/10.25081/jp.2024.v16.9037 | ||||||
| 2:59a | [PaleoIchthyology • 2025] Macadens olsoni • A New euchondrocephalan chondrichthyan (Chondrichthyes: Euchondrocephali) from the middle Mississippian (Viséan) Joppa Member of the Ste. Genevieve Formation at Mammoth Cave National Park, Kentucky, USA and A Re
A new euchondrocephalan chondrichthyan, Macadens olsoni gen. et sp. nov., is identified from the Middle Mississippian (Viséan) Joppa Member, Ste. Geneveive Formation from Mammoth Cave National Park, Kentucky. Macadens olsoni shares various morphological traits with the enigmatic taxon “Helodus” coxanus Newberry 1897, from the Lower-Middle Mississippian (Tournaisian) Keokuk Limestone of Iowa. These morphological traits of a lower symphyseal on a narrow mesiodistally elongated base with rounded and blunt cusps are not seen in Helodus and we create a new genus name and combination, Rotuladens gen. nov. coxanus Newberry 1897. Macadens and Rotuladens are proposed as members of unnamed clade with a sister-group relationship with Eugeneodontiformes.
Macadens olsoni gen. et sp. nov. John-Paul Michael Hodnett, Rickard Toomey, Hans-Dieter Sues, Vincent L. Santucci, Kelli Tolleson and Justin Tweet. 2025. A New euchondrocephalan chondrichthyan (Chondrichthyes, Euchondrocephali) from the middle Mississippian (Viséan) Joppa Member of the Ste. Genevieve Formation at Mammoth Cave National Park, Kentucky, USA and A Reassessment of the lower Mississippian (Tournaisian-Viséan) "Helodus" coxanus Newberry, 1897. New Mexico Museum of Natural History and Science Bulletin. 100: 87–93. | ||||||
| 1:01p | [Arachnida • 2025] Megaschizomus zhongshanensis • First Record of the Subfamily Megaschizominae Rowland, 1973 (Schizomida: Hubbardiidae) from China, with Description of A New Species of Megaschizomus Lawrence, 1969
Abstract The subfamily Megaschizominae Rowland, 1973 is recorded from China for the first time through the description of a new species in the genus Megaschizomus Lawrence, 1969: M. zhongshanensis sp. nov. (male, female). This study presents the first illustrated description of male genital structures for a species within this subfamily. In addition to the detailed description, illustrations, diagnosis, and a distribution map are provided. Additionally, the DNA barcode of the new species is also provided. Scorpiones, Schizomida, Asia, male genital, short-tailed whipscorpions, taxonomy    Tao ZHENG, Keliang WU and Feng ZHANG. 2025. First Record of the Subfamily Megaschizominae Rowland, 1973 from China, with Description of A New Species of Megaschizomus Lawrence, 1969 (Schizomida: Hubbardiidae). Zootaxa. 5661(1); 80-94. DOI: doi.org/10.11646/zootaxa.5661.1.3 [2025-07-14] | ||||||
| 2:00p | [Botany • 2025] Ainsliaea erectifolia & A. laxiflora (Asteraceae: Pertyoideae) • Two New Species from Southeast China: Based on Morphological Characters and Phylogenetic Evidence
ABSTRACT Two new species of Ainsliaea (Asteraceae: Pertyoideae), Ainsliaea erectifolia X.X.Su and S.P.Chen and Ainsliaea laxiflora X.X.Su and S.P.Chen, both from Fujian, Southeast China, are described and illustrated here. Morphologically, A. erectifolia is similar to A. simplicissima, but can be distinguished by both surfaces of leaves being glabrous and the capitulum bearing 3 flowers. A. laxiflora is similar to A. polystachya, but differs by its rosette leaves aggregating near the middle part of the stem, the capitulum bearing 3 flowers, the terminal inflorescence rachilla shorter than lateral rachillae, anthers lower than corolla lobes, and style equal to or slightly higher than corolla lobes. Phylogenetic analyses indicated that the two new species were closely related to each other and belong to section Aggregatae. These two species have currently been assessed as Critically Endangered (CR) according to the IUCN guidelines. Furthermore, the complete plastid genomes of these two new species are reported. This study not only introduces two new Ainsliaea species but also provides their plastid genome data, offering valuable genetic resources for understanding the evolutionary history of the genus Ainsliaea. Keywords: Asteraceae, morphology, new species, phylogeny, plastid genome, taxonomy
 Ainsliaea erectifolia X.X.Su and S.P.Chen sp. nov. Diagnosis: This species is morphologically similar to Ainsliaea simplicissima M. J. Zhang & H. Q. Li, from which it differs by the leaves both surfaces being glabrous and the capitulum bearing 3 flowers. Etymology: The species epithet refers to the first leaf of the plant being initially erect when it emerges. Vernacular Name: Simplified Chinese: 竖叶兔耳风; Chinese pinyin: shù-yè-tù-ěr-fēng.
Ainsliaea laxiflora X.X.Su and S.P.Chen sp. nov. Diagnosis: This species is similar to Ainsliaea polystachya X. X. Su & M. J. Zhang, but can be distinguished by its rosette leaves aggregated near the middle part of the stem, capitulum bearing three flowers, terminal inflorescence rachilla shorter than lateral rachillae, anthers lower than corolla lobes, and style equal to or slightly higher than corolla lobes. Etymology: The species epithet refers to its inflorescence, which is lax, with loose-flowered. Vernacular Name: Simplified Chinese: 疏花兔耳风; Chinese pinyin: shū-huā-tù-ěr-fēng. Cheng-Yuan Zhou, Xiangxiu Su, Chunyi Wei, Liang Ma and Shi-Pin Chen. 2025. Two New Ainsliaea Species (Asteraceae: Pertyoideae) from Southeast China: Based on Morphological Characters and Phylogenetic Evidence. Ecology and Evolution. DOI: doi.org/10.1002/ece3.71088 [06 March 2025] |
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