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Tuesday, May 7th, 2024
| Time | Event | ||||||||
| 1:05a | [Botany • 2022] Croton guaritensis (Euphorbiaceae: Crotoneae) • A New Species endemic to the Brazilian Pampa and its Phylogenetic Affinities
Abstract Croton guaritensis, sp. nov. is here described, illustrated, and classified based on morphological and molecular data. The new species is restricted to the Pampa biome where it grows around rocky outcrops. Examination of the morphology from herbarium collections and field observations, as well as evidence from molecular analysis, indicate that Croton guaritensis belongs to Croton section Barhamia subsection Medea. Croton subsection Medea is represented by several rare and endemic species and stands out by its glandular structures in stipules, bracts, and sepals. The new species differs from other species of this subsection in the indumentum on branches and leaves, which consists of subentire lepidote trichomes, and in the sepals of staminate and pistillate flowers that have stipitate glands. An identification key to the new species and closely related taxa in southern Brazil is provided, as well as a preliminary conservation status. Keywords: Croton sect. Barhamia subsect. Medea, Crotoneae, Neotropics, Southern Cone, Taxonomy
Croton guaritensis A.P.N.Pereira & Caruzo, sp. nov. Etymology: The specific epithet refers to the “Guaritas do Camaquã” rock formations in southern Brazil (see Fig. 2a), and is a reference to the type locality.
Amanda da Paixão Noronha Pereira, Ricarda Riina, Eduardo Valduga and Maria Beatriz Rossi Caruzo. 2022. A New Species of Croton (Euphorbiaceae) endemic to the Brazilian Pampa and its Phylogenetic Affinities. Plant Systematics and Evolution. 308, 14. DOI: 10.1007/s00606-021-01803-x [18 March 2022] | ||||||||
| 1:41a | [Ichthyology • 2024] Malagodon honahona • A New Extinct Species of Malagodon (Cyprinodontiformes: Pantanodontidae) from Southeastern Coastal Madagascar, with a Discussion of its Phylogenetic Relationships and a Redescription of the Genus
Abstract A new species belonging to the recently described genus Malagodon Meinema and Huber, 2023, is herein described from specimens collected in a single, small, isolated Pandanas swamp in southeastern coastal Madagascar, located within the Réserve Spéciale de Manombo, south of the town of Farafangana, its only known locality. The new species was last collected in the late 1990s, and despite repeated attempts over the past three decades, no additional specimens have been collected at the type locality or from any other suitable habitats within the region, and the species is presumed to be extinct. The new species is distinguished from its only congener, Malagodon madagascariensis, formerly known from forested swamps in northeastern coastal Madagascar, and also now considered to be extinct, by the following apomorphic features: a lower anal-fin ray count (15–17 vs. 18–19), a longer caudal peduncle (26.8%–39.8% vs. 21.9%–26.7% SL), and the presence of a platelike (vs. thin and spinelike) neural spine on the fifth vertebral centrum in both sexes. Additionally, the new species exhibits neural spines on both the sixth and seventh vertebral centra that are also somewhat expanded and platelike dorsally compared with those in M. madagascariensis, which are narrow and spinelike. We also provide a rediagnosis of Malagodon based on the examination of additional material unavailable in the original description, which was based on only three specimens (two males of M. madagascariensis and one female of the new species).
Malagodon honahona, new species Diagnosis: The new species is readily distinguished from Malagodon madagascariensis, its only congener, by the following apomorphic features: lower anal-fin ray count (15–17 vs. 18–19), longer caudal peduncle (26.8–39.8 vs. 21.9–26.7% SL), and notably expanded and platelike neural spine on arch of fifth vertebral centrum in both sexes (vs. thin and spinelike in M. madagascariensis). In addition, neural spines on both sixth and seventh vertebral centra in new species also somewhat expanded and platelike dorsally versus narrow and spinelike in P. madagascariensis. Etymology: Named for the swampy Pandanas dominated habitat in which this species occurred within the Réserve Spéciale de Manombo, in southeastern coastal Madagascar. Hohahona translates as swamp or swampy in Malagasy. The epithet, honahona, is used as a noun in apposition. Emily M. Carr, Rene P. Martin and John S. Sparks. 2024. A New Extinct Species of Malagodon (Cyprinodontiformes: Pantanodontidae) from Southeastern Coastal Madagascar, with a Discussion of its Phylogenetic Relationships and a Redescription of the Genus. American Museum Novitates. (4012), 1-16. DOI: 10.1206/4012.1 | ||||||||
| 1:51a | [Botany • 2021] Sonerila erectifolia & S. souvannii (Melastomataceae) • Two New Species from Laos
ABSTRACT Two new species of Sonerila Roxb. (Melastomataceae), S. erectifolia Phonep., Soulad. & Tagane sp. nov. from southern Laos, and S. souvannii Phonep. & Soulad. sp. nov. from central Laos, are described and illustrated. Comparisons with morphologically similar species are presented, along with ecological information and preliminary conservation status. A key to the species of Sonerila in Laos is also provided. Keywords: Bolaven Plateau, flora, Indochina, taxonomy, Vientiane Capital Class Magnoliopsida Brongn. Order Myrtales Juss. ex Bercht. & J.Presl. Family Melastomataceae Juss. Genus Sonerila Roxb. 
Sonerila erectifolia Phonep., Soulad. & Tagane sp. nov. Diagnosis: Sonerila erectifolia sp. nov. is similar to Sonerila violifolia in its scorpioid or subumbelliform inflorescence, but it differs in the length of stem (ca 1 cm long in S. erectifolia sp. nov. vs 10–18 cm long in S. violifolia), the venation of the leaves (2 veins running from the base of lamina vs pinnately veined with 2–3 lateral primary veins), hairiness of leaves (sparsely covered with whitish hairs on veins abaxially vs glabrous), the length of the petiole (6–10 cm long vs 1–7 cm long), and number of flowers per inflorescence (5–12(–18) flowers vs 1–9 flowers). For further comparison see Table 1. Etymology: The specific epithet refers to the plant having erect leaves. Vernacular name: ຊີດິນໃບຕັ້ງ [ʻSeedin Baitungʼ (meaning: ʻSonerila with erect leavesʼ)]
 Sonerila souvannii Phonep. & Soulad. sp. nov. Diagnosis: Sonerila souvannii sp. nov. is similar to S. cardamomensis, described from Cambodia, in its acaulescent habit and in the shape of its leaves, but it differs in the shape of its rhizome (cylindrical in S. souvanii vs bulbous in S. cardamomensis), larger leaves (8–10 × 6–9 cm vs 1–4 × 0.9–2.7 cm), petiole length and color (8–15 cm long and light green vs 0.4–2.5 cm long and reddish brown), greater number of flowers per cyme (20–25 vs 5–11), and petal length and pubescence (9–10 × 6–7 mm and glabrous vs 5.5–6 × 3.5–4 mm with glandular trichomes on midveins abaxially). Sonerila souvannii sp. nov.is also similar to S. dongnathamensis from Thailand in the shape of its inflorescences, but differs in the rhizome shape (cylindrical vs globose), the shape of the leaf base (cordate vs obtuse to rounded), pedicel length (10–25 mm long vs 1–4 mm long), the number of flowers per cyme (20–25 vs 5–12), and in the length and outline of the petals (9–10 × 6–7 mm, acute vs 3–5 × 3–4 mm, acuminate with long seta).The new species is also related to S. tuberosa from Cambodia, but distinguished in the rhizome shape (cylindrical vs slightly bulbous), the shape of the leaf base (cordate vs very broadly ovate to orbicular), pedicel length (10–25 mm long vs 5–6 mm long), the number of flowers per cyme (20–25 vs 4–8), and in the length and outline of the petals (9–10 × 6–7 mm, acute vs 5 × 2.7 mm, elliptic, apiculate, pink) (Table 2) Etymology: The specific epithet honours Keooudone Souvannakhoummane (Centre for Development and Environment), a plant taxonomist who has greatly contributed to our understanding of plant diversity in Laos through the description of many new species in various families for the flora of Laos. Vernacular name: ຊີດິນສຸວັນ [ʻSouvan’s Seedinʼ (meaning: ʻSouvan’s Sonerilaʼ)]. Phongphayboun Phonepaseuth, Phetlasy Souladeth, Keooudone Souvannakhoummane, Thyraphon Vongthavone and Shuichiro Tagane. 2021. Two New Species of Sonerila Roxb. (Melastomataceae) from Laos. European Journal of Taxonomy. 755(1), 136-148. DOI: 10.5852/ejt.2021.755.1403  | ||||||||
| 2:25a | [Herpetology • 2021] Xenorhina ventrimaculata • A New Xenorhina species (Anura: Microhylidae) from northwestern Papua New Guinea
Abstract We describe a new species of the asterophryine microhylid genus Xenorhina from the lowlands of northwestern Papua New Guinea. It is a medium-sized species (SUL of two males 29.2 and 29.9 mm; of four females 29.9–33.0 mm) that can be distinguished from congeners by having a single short, triangular odontoid spike (palatal tooth) on each vomeropalatine bone, moderately short legs (TL/SUL 0.40–0.44) and ventral surfaces heavily spotted with reddish-brown blotches or reticula. The advertisement call comprises 7–10 loud, melodious hooting notes lasting 141–165 ms and produced at a repetition rate of 2.19–2.35 notes/s. Description of this species brings to 41 the number of Xenorhina known from New Guinea and surrounding islands. Key words: Amphibia, New Guinea, Sepik River Basin, new species, advertisement call, taxonomy, ecofaunistics
Xenorhina ventrimaculata sp. nov. Diagnosis: A species of Xenorhina characterized by the unique combination of: medium size (SUL of two males 29.2–29.9 mm; of four females 29.9–33.0 mm); vomeropalatines each with one short triangular odontoid spike; legs moderately short (TL/SUL 0.40–0.44); all fingers and toe 1 without, and toes 2–5 with, expanded terminal discs; eye-naris distance greater than internarial distance (END/IND 1.10–1.21); tympanum about same size as eye (TyD/ED 0.95–1.16); dorsal surfaces in life different tones of brown with small blackish spots; ventral surfaces light ivory heavily spotted with reddish-brown blotches or reticula; advertisement calls uttered in series containing 7–10 loud hooting calls = notes each lasting 141–165 ms and produced at a rate of 2.19–2.35 calls/s. Etymology: The specific epithet is an adjective compound of two Latin words. Venter is a substantive and means belly or underside of the body and maculata is a feminine adjective meaning flecked or spotted. The specific epithet refers to the conspicuously spotted ventral surfaces of most specimens of the new species. Rainer Günther, Chris Dahl and Stephen J. Richards. 2021. Description of A New Xenorhina species (Anura, Microhylidae) from northwestern Papua New Guinea. Vertebrate Zoology. 71: 621-630. DOI: 10.3897/vz.71.e66954  | ||||||||
| 2:26a | [Botany • 2017] Phyllagathis millelunata, P. phyllioides, P. violinifolia, P. wallacei, etc. (Melastomataceae: Sonerileae) • Ten New Species from Sarawak, Borneo
Abstract Ten undescribed species of Phyllagathis from southwestern Sarawak, named P. bicolor, P. lii, P. millelunata, P. phyllioides, P. rivularis, P. rubrosetosa, P. ulu, P. violinifolia, P. wallacei and P. yodae are reported in this study. We describe and illustrate the ten new species after a careful study of the literature, herbarium specimens and living plants. Keywords: Sonerileae, Melastomataceae, Sarawak, Borneo, Eudicots  Phyllagathis bicolor C.W. Lin, C.F. Chen & T.Y.A. Yang, sp. nov. Etymology: “Bicolor” refers to the color of the leaves, with dark maroon background surrounded by an emerald green periphery Phyllagathis lii C.W. Lin, C.F. Chen & T.Y.A. Yang, sp. nov. Etymology: The specific epithet is named in honor of Mr. Weng-Feng Li, who grows this Phyllagathis and provided the specimens for our studies. Phyllagathis millelunata C.W. Lin, C.F. Chen & T.Y.A. Yang, sp. nov. Etymology: Latin, mille = thousand, luna = moon, referring to the vesiculate translucent (and scintillating in the sunshine) trichomes on both leaf surfaces, resembling numberless moons. Phyllagathis phyllioides C.W. Lin, C.F. Chen & T.Y.A. Yang, sp. nov. Etymology: The specific epithet refers to the resemblance of this new species panduriform leaves to the leaf insect genus “Phyllium”. Phyllagathis rivularis C.W. Lin, C.F. Chen & T.Y.A. Yang, sp. nov. Etymology: rivularis means “river”, and the epithet refers to the fact that the new species grows along stream banks.  Phyllagathis rubrosetosa C.W. Lin, C.F. Chen & T.Y.A. Yang, sp. nov. Etymology: “Rubrosetosa” refers to the red hairs on the leaf. Phyllagathis ulu C.W. Lin, C.F. Chen & T.Y.A. Yang. sp. nov. Etymology: Malay, ulu= upriver; referring to the new species being discovered in upstream Batang Ai. Phyllagathis violinifolia C.W. Lin, C.F. Chen & T.Y.A. Yang, sp. nov. Etymology: The epithet refers to the panduriform-obovate leaves. Phyllagathis wallacei C.W. Lin, C.F. Chen & T.Y.A. Yang. sp. nov. Etymology: Named in honour of Alfred Russel Wallace, the noted naturalist who explored Simunjan in the19th century, and discovered many wild animals and plants. Phyllagathis yodae C.W. Lin, C.F. Chen & T.Y.A. Yang, sp. nov. Etymology: The specific epithet was chosen after “Yoda”, a character in Star Wars movies, who has a furry, wrinkled and greenish appearance. This new species is characterized by the hairy, rugose and greenish leaves that resembles Yoda, therefore we choose this special character as the epithet.  Che-Wei Lin, Chien-Fan Chen and T.Y. Aleck Yang. 2017. Ten New Species of Phyllagathis (Trib. Sonerileae, Melastomataceae ) from Sarawak, Borneo. Phytotaxa. 302(3); 201–228. DOI: 10.11646/phytotaxa.302.3.1
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| 2:26a | [Botany • 2024] Giuliettia minima • A tiny rediscovery in the Land of Giants: A New Combination in Giuliettia (Poales: Eriocaulaceae) and other implications of finding Paepalanthus minimus again
Abstract Serra do Padre Ângelo, a quartzitic massif in eastern Minas Gerais, Brazil, was nicknamed “Land of Giants” due to the gigantism observed in some plant species found in its campos rupestres. During fieldwork for the floristic inventory of this Serra, a small Eriocaulaceae species was collected. Initially it was believed to be a new species, but a thorough revision of names and type specimens revealed that it was conspecific with Paepalanthus minimus. This taxon was known only from the type specimen collected over 100 years ago and more than 200 km distant from the new collections. It had been overlooked in previous studies dealing with the family in Brazil, which could be explained by its diminutive size and the poor conditions of the type specimen. Here we present the implications of this rediscovery, including the combination of P. minimus in Giuliettia, a genus recently proposed based on general habit, inflorescence and seed morphology. We also present information on distribution and ecology and briefly discuss the biogeographical pattern that could explain this rediscovery far away from the previous record. Considering its likely local extinction at the type locality and threats to the quality of its remaining habitat, the species is preliminarily assessed as Critically Endangered. This highlights the urgent need for conservation actions to protect Serra do Padre Ângelo and its unique biodiversity. KEYWORDS: Campos rupestres, conservation, Eriocaulaceae, Giuliettia, monocots, Paepalanthus, Poales
--2024_Andrino_Rocha_Gonella.jpg) Giuliettia minima (Silveira) Andrino, L. H. Rocha & Gonella, comb. nov. ≡ Paepalanthus minimus Silveira, Floral. Mont. 1: 107, t. 66. 1928.
--2024_Andrino_Rocha_Gonella.jpg) Proposed vernacular name — “sempre-viva-mínima” (Portuguese). Following the suggestion of Marinho & Scatigna (2022), we propose a vernacular name for this species as a way to promote knowledge about it to the local communities and to address the urgency of promoting conservation actions to protect the species and its habitat. The proposed name considers the common name of many Eriocaulaceae species in Brazil (“sempre-viva” – Portuguese for “everlasting”) plus the specific epithet, which is easily relatable in Portuguese, meaning “minimal” or “very small”. Caroline Oliveira Andrino, Luiz Henrique Rocha and Paulo Minatel Gonella. 2024. A tiny rediscovery in the Land of Giants: A New Combination in Giuliettia (Eriocaulaceae, Poales) and other implications of finding Paepalanthus minimus again. Willdenowia. 54(1):81-93. DOI: 10.3372/wi.54.54104 A Serra do Padre Ângelo, um maciço quartzítico no leste de Minas Gerais, Brasil, foi apelidada de “Terra de Gigantes” devido ao gigantismo observado em algumas espécies de plantas encontradas em seus campos rupestres. Durante o trabalho de campo para o inventário florístico desta Serra, uma pequena espécie de Eriocaulaceae foi coletada. Inicialmente, acreditava-se ser uma nova espécie, mas uma revisão minuciosa dos nomes e espécimes tipo revelou que ela era na verdade conspecífica com Paepalanthus minimus. Esse táxon era conhecido apenas pelo espécime tipo, coletado há mais de 100 anos e a mais de 200 km das novas coletas, tendo passado despercebido em estudos anteriores sobre a família no Brasil, o que pode ser explicado pelo seu tamanho diminuto e pelas condições precárias do espécime tipo. Aqui, apresentamos as implicações dessa redescoberta, incluindo a combinação de P. minimus em Giuliettia, um gênero recentemente proposto, com base em seu hábito geral, morfologia da inflorescência e da semente. Também fornecemos informações sobre a distribuição e ecologia, e discutimos brevemente o padrão biogeográfico que poderia explicar essa redescoberta tão distante do registro anterior. Considerando sua provável extinção local na localidade tipo e as ameaças à qualidade de seu habitat remanescente, a espécie é preliminarmente avaliada como Criticamente em Perigo. Isso destaca a necessidade urgente de ações de conservação para proteger a Serra do Padre Ângelo e sua biodiversidade única. Campos rupestres, conservação, Eriocaulaceae, Giuliettia, Paepalanthus, Poales, monocotiledôneas, espécie ameaçada | ||||||||
| 2:26a | [Ichthyology • 2024] Microglanis lucenai • The Barcode Trap—Description of A New Species of Microglanis (Siluriformes: Pseudopimelodidae), with A Review of the Status of Microglanis cibelae
Abstract In a recent study based on the generalized mixed Yule coalescent method for delimiting species, a threshold of 2% genetic distance using cytochrome c oxidase subunit I sequences was used to delimit the species of Microglanis. That action resulted in assembling several populations of Microglanis from Atlantic coastal rivers between Rio Grande do Sul and São Paulo states as a single species, Microglanis cottoides, including Microglanis cibelae as a junior synonym. We reexamined these populations and found three species diagnosed by their morphology and that constitute separate mtDNA lineages, including a new species. The synonym of M. cibelae and M. cottoides is reviewed and refuted based on morphological and molecular evidence. M. cibelae and the new species are sympatric and occasionally syntopic in the Tramandaí, Mampituba, and Araranguá river basins. The new species is distinguished from M. cibelae and M. cottoides by the anterior margin of the posttemporosupracleitrum narrow articulated with the epioccipital, the short mental and maxillary barbels, and depressed head and body. Keywords: barcode, biodiversity, catfish, GMYC, Microglanis cottoides, Neotropical  Microglanis lucenai Pablo Lehmann Albornoz, César Sá Bartzen and Luiz R. Malabarba. 2024. The Barcode Trap—Description of A New Species of Microglanis, with A Review of the Status of Microglanis cibelae (Siluriformes: Pseudopimelodidae). Journal of Fish Biology. DOI: 10.1111/jfb.15764 | ||||||||
| 9:17a | [Botany • 2021] Opilionanthe magdalenae (Orchidaceae: Pleurothallidinae) • A New Species and New Records in the Lepanthes clade for Perú
Abstract A new species of Opilionanthe, viz O. magdalenae, from the montane forest of Perú is described and illustrated. Opilionanthe magdalenae is the second species of the genus and is distinguished from its congener O. manningii by its narrow leaves (only 0.7 mm wide), reddish flowers with petals about half the length of the sepals, and a lip with rounded lateral lobes. Additionally, eleven new country records of species in the Lepanthes clade are presented based on field explorations and herbarium revision. Information about the habitat and distribution of all species treated are provided. Keywords: Kosñipata Valley, Neotropics Peruvian, flora, taxonomy
Opilionanthe magdalenae A. Damian & N. Mitidieri sp.nov. Alexander Damián Parizaca, Nicole Mitidieri Rivera and Leyda Rimarachin. 2021. A New Species of Opilionanthe (Pleurothallidinae, Orchidaceae) and New Records in the Lepanthes clade for Perú. Nordic Journal of Botany. 39(9) DOI: 10.1111/njb.03307 |
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