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Sunday, May 12th, 2024
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| 7:22a | [Botany • 2024] Asplenium guodanum (Aspleniaceae) • A distinct New fern Species from northern Guangdong, China, based on morphological data and molecular phylogeny
Abstract A new spleenwort species, Asplenium guodanum, was found and described from Danxia landform region in Guangdong, China. The new species has close resemblance to A. subcrenatum Ching ex S.H.Wu in morphology, but can be distinguished by having plants small, stipes and rachises not covered with fibrous scales, relatively fewer pairs of pinnae, pinnae short, pinna margin weakly biserrate, pinna apex acute and lower pinnae obviously reduced. Phylogenetic analyses, based on six plastid markers (atpB, rbcL, rps4 & rps4-trnS and trnL & trnL-F) of the new species and its relatives, support a close relationship between A. guodanum and A. subcrenatum. Only one population with no more than 50 individuals were found and, therefore, it is recommended to be classified as Critically Endangered (CR) following IUCN Red List Criteria. Key words: Conservation, Danxia landform, molecular phylogeny, species diversity, taxonomy
Asplenium guodanum K.W.Xu & W.B.Liao, sp. nov. Diagnosis: Asplenium guodanum is morphologically most similar to A. subcrenatum, but different by having small size (15–30 cm tall vs. 30–55 cm tall), rhizome scales brown to dark brown (vs. reddish-brown in A. subcrenatum), stipes and rachises not covered with fibrous scales (vs. densely covered with fibrous scales in A. subcrenatum), relatively fewer pairs of pinnae (10–15 pairs vs. 18–25 pairs), pinnae short (2–3.5 cm vs. 6–10 cm), pinna margins weakly biserrate (vs. almost entire to crenate-sinuate in A. subcrenatum), pinna apex acute (vs. acuminate in A. subcrenatum) and lower pinnae obviously reduced. Ke-Wang Xu, Yu-Tong Han, Yu-Ran Dong, Jian-Qiang Guo, Ling-Feng Mao and Wen-Bo Liao. 2024. Asplenium guodanum (Aspleniaceae), A distinct New fern Species from northern Guangdong, China, based on morphological data and molecular phylogeny. PhytoKeys. 241: 191-200. DOI: 10.3897/phytokeys.241.122789  | ||||||
| 7:40a | [Botany • 2024] Primula weiliei (Primulaceae) • A New Species from Hubei, Central China
Abstract In this study, we describe and illustrate a new species, Primula weiliei L.S.Yang, Z.K.Wu & G.W.Hu, from the Shennongjia Forestry District, Hubei Province in Central China. It is morphologically assigned to Primula sect. Aleuritia based on its dwarf and hairless habit, long petiole, fruits longer than calyx and covered by farina on the scape. This new species is similar to P. gemmifera and P. munroi subsp. yargongensis in the same section, but it can be distinguished by its smaller calyxes, homostylous flowers, corolla tube throat without annular appendage and only 1–2 flowers in each inflorescence. Based on the assessment conducted according to the IUCN Red List criteria, we propose that P. weiliei be classified as a Critically Endangered (CR) species. Key words: China, conservation, Primula, Section Aleuritia, Shennongjia
Primula weiliei L.S.Yang, Z.K.Wu & G.W.Hu, sp. nov. Diagnosis: This new species resembles Primula gemmifera and P. munroi subsp. yargongensis but differs significantly from the latter in several aspects: umbels are 1–2-flowered, scapes are 5–10 cm long, bracts measure 2–4 mm long, campanulate calyx is 3–4 mm long, flowers are homostylous, and the corolla throat lacks an annular appendage. Among the homostylous types in Primula sect. Aleuritia, P. clutterbuckii, P. meiotera, and P. weiliei share some similarities but are distinct from each other. P. clutterbuckii and P. meiotera feature multiple short stems with clustered leaves showing large and deep serrations along the leaf margin, along with a thick powder abaxially. In contrast, P. weiliei has a single rhizome, fewer leaves with fewer dentate or shallow teeth on the margin, and a slightly farinose abaxial surface.  Lin-Sen Yang, Zhi-Kun Wu, Hong-Wei Liang, Meng-Hua Zhang, Xian-Chun Zhang, Shuai Peng and Guang-Wan Hu. 2024. Primula weiliei (Primulaceae), A New Species from Hubei, Central China. PhytoKeys. 242: 1-8. DOI: 10.3897/phytokeys.242.119351 | ||||||
| 7:45a | [Crustacea • 2024] Sundathelphusa roberti • A New Species of Freshwater Crab (Brachyura: Gecarcinucidae) from Highlands in Batangas, Luzon, Philippines
Abstract A new species of freshwater crab belonging to a group of species morphologically similar to Sundathelphusa philippina (Von Martens, 1868) is described from highlands in the province of Batangas, southern Luzon, Philippines. Sundathelphusa roberti new species, however, differs from members of this group by the position and strength of the epigastric and postorbital cristae, form of the posterior epistomal margin, shape of the third maxillipeds, and structure of the male first gonopod. The new taxon is the 35th species of Sundathelphusa known from the Philippines. Keywords: Gecarcinucoidea; comparative taxonomy; description; montane species; Southeast Asia;  Sundathelphusa roberti new species Peter K. L. Ng and Jose C. E. Mendoza. 2024. A New Species of Freshwater Crab, Sundathelphusa roberti (Brachyura, Gecarcinucidae) from Highlands in Batangas, Luzon, Philippines. Crustaceana. 97(3-4); 221–233. DOI: 10.1163/15685403-bja10364 .jpg) | ||||||
| 9:36a | [Botany • 2024] Vriesea organensis (Bromeliaceae: Tillandsioideae) • A Total Evidence Phylogeny sheds light on A New Vriesea Species from the Brazilian Atlantic Forest
Abstract Vriesea is one of the most diverse genera in the Brazilian Atlantic Forest, comprising approximately 170 species in this domain. Included in this genus, the V. ensiformis group encompasses ten species that are distributed from northeastern to southern Brazil. During field expeditions in Parque Nacional da Serra dos Órgãos, Rio de Janeiro, Brazil, we found a new species which was previously long recognized as Vriesea aff. gradata in herbaria. Thus, here we aim to describe V. organensis and investigate its phylogenetic relationship to other species in the V. ensiformis group through a total evidence approach. We conducted an extensive literature review, herbarium consulting and field trips to gather data for describing the new species. Additionally, we constructed a concatenated matrix of molecular and morphological data to generate a phylogenetic hypothesis for the V. ensiformis group. Vriesea organensis is morphologically related to V. psittacina, V. gradata and V. fluviatilis and is described as possibly critically endangered. Our phylogenetic tree revealed that V. organensis is closely related to V. fluviatilis, in contrast to the herbarium hypothesis of similarity with V. gradata. The new species is characterized by the floral bracts incurvate and strongly carinate at the apex, rachis exposed when flowering, petal yellow with green apex and stigma exceeding the anthers. Furthermore, our findings indicate that the V. ensiformis group is not monophyletic based on our dataset. Keywords: Bromeliad, Epiphyte, Neotropics, Serra do Mar, Systematics, Taxonomy
 Vriesea organensis Kessous & A.F.Costa, sp. nov. Etymology: The specific epithet "organensis" refers to the type locality of this taxon in Serra dos Órgãos, Rio de Janeiro, Brazil. Igor Musauer Kessous, Fabiano Salgueiro and Andrea Ferreira da Costa. 2024. A Total Evidence Phylogeny sheds light on A New Vriesea (Tillandsioideae, Bromeliaceae) Species from the Brazilian Atlantic Forest. Plant Systematics and Evolution. 310, 6 DOI: 10.1007/s00606-023-01885-9 | ||||||
| 1:43p | [PaleoMammalogy • 2024] Hispanodorcas longdongica • First Report of Hispanodorcas (Bovidae: Antilopinae) from the Late Miocene of China
Asbtract As a small to middle-sized bovid, Hispanodorcas had previously only been found in the pan-Mediterranean region and South Asia. Its taxonomic classification at the tribe level has been a subject of debate, with possible associations to Antilopini, Reduncini, or Oiocerini. Here, we report on the first discovery of Hispanodorcas in East Asia, H. longdongica sp. nov. from the Daidian Locality in China, dating to the early Baodean age (~8-7 Ma). The new material consists of five skulls with varying states of preservation and provides the most complete osteological information on Hispanodorcas to date. It features a long, slender, and posteriorly curved horncore with a weak homonymous twist and both laterodorsal and medioventral grooves, which is characteristic of Hispanodorcas. This new species is characterized by having the smallest size amongst all known Hispanodorcas species, a weakly curved brain case in the facial region, and poorly developed posterior and anterior basilar tuberosities. These primitive characteristics suggest that H. longdongica may represent an early evolutionary stage of this genus. Furthermore, they indicate that Hispanodorcas might have directly evolved from the Gazella stock. The homonymous twist in the horncore, which aligns with Oiocerini, may be a case of homoplasy.
Family Bovidae Gray, 1821 Subfamily Antilopinae Gray, 1821 Hispanodorcas Thomas et al., 1982 Hispanodorcas longdongica sp. nov. Diagnosis: Hispanodorcas of small size (size close to living Oribi, Ourebia ourebi); horncore long and slender, posteriorly curved, slightly diverge, moderately compressed, with a weak homonymous twist (1/2 circle); laterodorsal and medioventral grooves present (with variation); post cornual fossa round and deep, supraorbital foramen oval and deep. Cranial bent weak, resulting in a small angle between the horncore and dorsal cranium; occiput low; basioccipital and basisphenoid thin with relatively weak posterior and anterior basilar tuberosities. Tympanic bullae large, ellipsoid, with poorly developed lamina vaginalis; lacrimal fossa shallow, poorly defined. Cheek teeth high-crowned, lacking ecto/entostylies. Etymology The species name derives from the region name, Longdong, where the new specimens were discovered.  WU Yong, WANG Shi-Qi, LIANG Zhi-Yong, GUO Ding-Ge, SUN Bo-Yang, LIU Long, DUAN Kai and CHEN Guo-Zhong. 2024. First Report of Hispanodorcas from the Late Miocene of China. Vertebrata PalAsiatica. 62(2); 135-155. DOI: 10.19615/j.cnki.2096-9899.240123   |
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