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Saturday, June 15th, 2024
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| 2:04a | [Botany • 2024] Microchirita argostemmiflora, M. flavofusca, M. magniflora • Three New Species from Khammouane Karst [Studies on the Gesneriaceae in Laos I]
Abstract Three new species of Microchirita from the Khammouane Karst are here described as part of studies on the family Gesneriaceae in Laos. The description, habitat, phenology, vernacular name, initial IUCN assessment, illustration, and photographs of the new taxa are provided. Keywords: Hin Nam No National Park, limestone flora, new taxa, taxonomy
Microchirita argostemmiflora Souvann. & Lanors., sp. nov. Similar to Microchirita personata C.Puglisi in the habit, but differing in the inflorescence 2–6-flowered (vs more than 10-flowered), corolla lobes rotate (vs personate), anthers yellow, papillose (vs white, glabrous). Etymology.— The specific epithet refers to the flowers resembling the flower of Argostemma (Rubiaceae). Vernacular name.— ດອກປີ່ນຂາວ [Dok Pin Khao].
Microchirita flavofusca Souvann. & Lanors. sp. nov. Similar to Microchirita glandulosa C.Puglisi in having bracts fused at the base, but differeng in the stem glabrous (vs stem sparsely glandular hairy), calyx tube 2.5–4 mm, hairy only outside (vs 1.5 mm, hairy on both sides), corolla 3–3.5 cm long, light yellow with brown-red patch (vs 15–18 mm, white), filaments minutely glandular (vs glabrous). It is also similar to M.magnifloraSouvann., but differing by calyx sparsely eglandular pubescent, remote serrate with glandular margin (vs densely glandular pubescent, with some stellate hairs, and entire margin), corollalightly yellow with brown-red patch inside (vs corolla dark purple, granite grey patch near mouth with yellow inside). Etymology.—The specific epithet refers to the yellow flower with brown-red patch. Vernacular name.— ດອກລະຄັງເຫຼືອງ [Dok La Khang Leung].
Microchirita magniflora Souvann., sp. nov. Similar to Microchirita involucrata (Craib) Yin Z.Wang in the habit and morphology of flower form, but differing in bracts fuse at the base (vs free), calyx covered by glandular hairs with some stellate hairs outside (vs only glandular hairs), corolla 35–40 mm long, yellow inside throat (vs 18–21 mm long, not yellow inside), filaments minutely glandular (vs glabrous). Etymology.— The specific epithet refers to large flowers. Vernacular name.— ດອກລະຄັງຫວງ [Dok La Khang Louang]. Keooudone Souvannakhoummane and Soulivanh Lanorsavanh. 2024. Studies on the Gesneriaceae in Laos I: Three New Species of Microchirita from Khammouane Karst. Tropical Natural History. 24(1); 2024), 60–69. li01.tci-thaijo.org/index.php/TNH/article/view/259309 | ||||||||
| 2:22a | [Botany • 2024] Paepalanthus magnus (Poales: Eriocaulaceae) • A Missing Piece is Found: A New Species and the puzzling relations of the campos rupestres Mountaintop Floras of eastern Minas Gerais, Brazil
Abstract Paepalanthus is a diverse genus characteristic of the campos rupestres, a megadiverse vegetation found on mountaintops of mainly quartzitic mountain ranges of central-eastern Brazil. Recent efforts on prospecting the biodiversity of Serra do Padre Ângelo, a small mountain complex in eastern Minas Gerais, yielded several new plant and animal species, highlighting the urgency of conservation actions towards this still unprotected area. Here, we describe yet another new species found in the campos rupestres of these mountains, Paepalanthus magnus, a mountaintop microendemic species morphologically similar to taxa found in the Espinhaço Range, over 200 km distant, a biogeographic pattern shared by several other species. The affinities of the new species are discussed, and we provide illustrations, photographs, and SEM photomicrographs of the seed. We also discuss the conservation status of the species, which is preliminarily assessed as Critically Endangered, reinforcing the urgent need to address the conservation of the unique biodiversity of Serra do Padre Ângelo. Key words: Atlantic Forest, endemism, João Pinto Formation, Serra do Padre Ângelo, threatened species
Paepalanthus magnus L.H.Rocha, Gonella & Andrino, sp. nov. Diagnosis: The new species is most similar to Paepalanthus regelianus Körn., with which it shares the pilose abaxial surface of the leaves. However, P. regelianus presents scapes that are about twice as long as the leaves and tomentose (vs. scapes at least 3 times longer than the leaves, and glabrous in P. magnus) and involucral bracts with a glabrous abaxial surface and ciliated margin (vs. pilose in P. magnus). Furthermore, the spathes of P. regelianus are shorter than its leaves, approximately half as long as the leaves (vs. spathes about as long as the leaves), present uniformly distributed trichomes (vs. along longitudinal nerves), and possess a short opening, no longer than 1 cm long (vs. opening distinctly longer, 2.5–6.0 cm long).  Etymology: The epithet “magnus” derives from the Latin “great”, “large”. This epithet was selected to denote the characteristic of the species being large in size, contrasting with the majority of Eriocaulaceae species found in the region where it occurs but also a reference to its larger size compared to its putative closest taxa.  Luiz Henrique Rocha, Paulo Minatel Gonella and Caroline Oliveira Andrino. 2024. A Missing Piece is Found: A New Species of Paepalanthus (Poales, Eriocaulaceae) and the puzzling relations of the campos rupestres Mountaintop Floras of eastern Minas Gerais, Brazil. PhytoKeys. 242: 317-332. DOI: 10.3897/phytokeys.242.122824 Resumo: Paepalanthus é um gênero característico dos campos rupestres, uma vegetação megadiversa encontrada no topo de montanhas de cadeias montanhosas, principalmente quartzíticas, do centro-leste do Brasil. Esforços recentes de inventariar a biodiversidade da Serra do Padre Ângelo, um pequeno complexo montanhoso no leste de Minas Gerais, resultaram na descoberta de várias novas espécies de plantas e animais, destacando a urgência de ações de conservação para esta área ainda não protegida. Aqui, descrevemos mais uma nova espécie encontrada nos campos rupestres dessas montanhas, Paepalanthus magnus, uma espécie microendêmica, morfologicamente semelhante a táxons encontrados na Serra do Espinhaço, a mais de 200 km de distância, um padrão biogeográfico repetido por várias outras espécies. As afinidades da nova espécie são discutidas e fornecemos ilustrações, fotografias da planta e de microscopia eletrônica de varredura (MEV) da semente. Também discutimos o status de conservação da espécie, que é preliminarmente avaliada como Criticamente Em Perigo, reforçando a necessidade urgente de abordar a conservação da biodiversidade única da Serra do Padre Ângelo. Palavras-chave: Espécie ameaçada, endemismo, Formação João Pinto, Mata Atlântica, Serra do Padre Ângelo | ||||||||
| 8:08a | [Botany • 2024] Eugenia stenocarpa (Myrtaceae) • A New Species from the Atlantic Forest of São Paulo, Brazil, with a remarkable fruit
Abstract The new species Eugenia stenocarpa Valdemarin & A.Maruy. is described and illustrated. It is nested within Eugenia sect. Speciosae but is distinguished from other species in the section by the combination of its sparsely puberulent and glabrescent young twigs, revolute leaf margin with a thickened yellow edge, flowers with pubescent hypanthium, and remarkable cylindrical fruits. Images of a specimen in situ and of dried material are provided, as is a provisional conservation assessment and discussion of morphological similarities between Eugenia stenocarpa and other Eugenia species. Keywords: Eugenia sect Speciosae, Fleshy fruit, Neotropics, Taxonomy
Eugenia stenocarpa Valdemarin & A.Maruy., sp. nov. Eugenia stenocarpa is morphologically distinguished from all other species of Eugenia sect. Speciosae Bünger & Mazine by its cylindrical (vs globose) fruits. Additionally, it can be distinguished from the most similar species, Eugenia speciosa Cambess., by its leaf blades with inconspicuous oil glands above and slightly raised below (vs raised on both surfaces in E. speciosa), pedicels 25–39 mm long (vs 5–24 mm long), flowers with calyx lobes 4–5 mm long (vs 5–8 mm long) and pubescent hypanthium (vs glabrous). Etymology. The specific epithet refers to the species’ narrowly cylindrical fruits, an unusual characteristic in Eugenia sect. Speciosae. K. S. Valdemarin, A. S. C. Maruyama, A. G. de Lima, V. C. Souza and F. F. Mazine. 2024. Eugenia stenocarpa (Myrtaceae), A New Species from the Atlantic Forest of São Paulo, Brazil, with a remarkable fruit. Edinburgh Journal of Botany. 81; DOI: 10.24823/ejb.2024.1945 | ||||||||
| 3:52p | [Ornithology • 2024] Trichothraupis griseonota • A New Species of Tanager (Aves: Thraupidae) from the Eastern Slopes of the Andes
Abstract The Black-goggled Tanager (Trichothraupis melanops) is a South American forest species that comprises two disjunct populations in the Atlantic Forest and in the Andes. During visits to natural history museums, we noticed morphological differences between these populations, which led to a taxonomic revision of the species based on plumage patterns and morphometry. Our analyses revealed that both populations are fully diagnosable, and that the Andean population represents an undescribed taxon, which we name Trichothraupis griseonota sp. nov. The new taxon differs from T. melanops by the extension of black in the faces of the males, covering the auricular region, and a greyer shade on the back (instead of olive). A previous mtDNA study with Trichothraupis is consistent with our conclusions that a new taxon requires recognition. The new species is found from 400 m up to 1,700 m on the eastern slopes of the Andes in Peru, Bolivia, and northwestern Argentina, inhabiting Tucumano-Boliviano and Yungas Forests as opposed to the Atlantic Forests where T. melanops is found. The biogeographical disjunction of the two species is similar to what has been observed for other bird species and subspecies, whereby avian lineages are allopatrically distributed and separated by the Chaco-Cerrado vegetation. The description of this taxon reinforces the importance of continued studies and analyses of museum specimens, which may yet reveal little-known patterns and undescribed taxa. Aves, Andean Forests, Atlantic Forest, Biogeography, Taxonomy, Trichothraupis  Trichothraupis griseonota sp. nov. Vagner Cavarzere, Thiago Vernaschi V. Costa, Gustavo S. Cabanne, Natalia Trujillo-Arias, Rafael S. Marcondes, Luís F. Silveira. 2024. A New Species of Tanager (Aves: Thraupidae) from the Eastern Slopes of the Andes. Zootaxa. 5468(3); 541-556. DOI: 10.11646/zootaxa.5468.3.7 new-dinosaurs.tumblr.com/post/7532291594  |
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