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Saturday, March 23rd, 2024
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| 2:05p | [Ichthyology • 2024] The Indo-Pacific Stingray Genus Brevitrygon (Myliobatiformes: Dasyatidae): Clarification of Historical Names and Description of a New Species, B. manjajiae sp. nov., from the Western Indian Ocean
Abstract Members of the genus Brevitrygon are small, locally abundant tropical stingrays (family Dasyatidae) occurring in soft sedimentary habitats of inner continental shelves of the Indo-West Pacific from the Red Sea to Indonesia. Formerly members of the genus Himantura, whose members lack dorsal and ventral skin folds on the tail (typical of most dasyatid genera), folds are present or rudimentary in some Brevitrygon. Important to artisanal fisheries and known to consist of at least five species, these fishes are possibly the most frequently misidentified of all stingrays. Most were inadequately described in the 19th century, and they are often taxonomically confused due to morphological similarity, ontogenetic variability, and sexual dimorphism. Their nomenclatural history is complex with four of the known species represented within the type series of one species, B. walga (Müller & Henle). Also, the type of the species with which B. walga is most often confused, B. imbricata (Bloch & Schneider) from off southern India and Sri Lanka, is in very poor condition. A lectotype has been designated for B. walga (confined to the Bay of Bengal). The genus also contains B. heterura (Bleeker) from the Indo-Malay Archipelago, B. javaensis (Last & White) from off southern Indonesia, and a new species, B. manjajiae sp. nov., from the western Indian Ocean. The former species are redescribed and redefined based largely on a combination of morphometrics, tail morphology, squamation, and molecular data. Molecular divergences were detected within lineages of B. heterura, B. walga and B. manjajiae sp. nov., requiring further investigation. Keywords: Chondrichthyes; Elasmobranchii; systematics; taxonomy; diversity; review of genus; nomenclatural discussion; redescriptions; morphology; genetics; NADH2  Peter R. Last, Simon Weigmann and Gavin J. P. Naylor. 2024. The Indo-Pacific Stingray Genus Brevitrygon (Myliobatiformes: Dasyatidae): Clarification of Historical Names and Description of a New Species, B. manjajiae sp. nov., from the Western Indian Ocean. Diversity. 15(12), 1213. DOI: 10.3390/d15121213 (This article belongs to the Special Issue Recent Advances in Ecology, Evolution and Biodiversity of the Chondrichthyan Fauna) | ||||
| 2:05p | [Botany • 2023] Rigiolepis gayoensis (Ericaceae: Vaccinioideae) • A New Species from the Gayo Plateau, Aceh Province, Indonesia
Abstract A new species of Ericaceae from the Gayo Plateau, Aceh Province, Indonesia is described. Rigiolepis gayoensis resembles R. lanceolata but differs by having shorter leaves, non-protruding basal leaf glands, longer flowering pedicels, a glabrous hypanthium, and a dark red or maroon corolla. A detailed morphological description, ecological notes, conservation status, and photographs are presented. The new species represents the third species of Rigiolepis found in the island of Sumatra. A key to the species of Rigiolepis in Sumatra is provided. Keywords: epiphyte, Rigiolepis, Sumatra, taxonomy, Vaccinioideae
Rigiolepis gayoensis Mustaqim, M.N.Tamayo &. P.W.Fritsch, sp. nov. Diagnosis: Rigiolepis gayoensis closely resembles R. lanceolata (Blume) J.J.Sm. but differs by having shorter leaves [4.6–5.5 cm vs. c. 9.0 cm (or longer)], non-protruding basal leaf glands (vs. protruding), longer flowering pedicels (c. 11 mm vs. 2–3 mm), a glabrous hypanthium (vs. densely hairy), and a dark red or maroon corolla (vs. creamy white). Wendy A. Mustaqim, Maverick N. Tamayo, Prima W.K. Hutabarat, Zulfan Arico and Peter W. Fritsch. 2023. A New Species of Rigiolepis (Ericaceae: Vaccinioideae) from the Gayo Plateau, Aceh Province, Indonesia. Webbia. 78(2); 73-78. DOI: 10.36253/jopt-14872  | ||||
| 2:05p | [Invertebrate • 2024] Megascolex jeyporeghatiensis & M. quadripapillatus • Two New Species of the Genus Megascolex Templeton, 1844 (Clitellata: Megascolecidae) from the Eastern Ghats of Odisha State, India
Abstract Two new earthworm species of Megascolex Templeton, 1844, M. quadripapillatus Narayanan & Paliwal, sp. nov. and M. jeyporeghatiensis Narayanan & Paliwal, sp. nov. are described from the under-explored Eastern Ghats Hills of Odisha state in Peninsular India. They belong to a group of species characterized by two pairs of spermathecal pores in intersegmental furrows 7/8/9, holandric, seminal vesicles in segments 9 and 12, absence of penial setae and calciferous glands. Megascolex ratus Cognetti, 1911, M. pumilio Stephenson, 1916 and the two new species described here are the members of this group. Megascolex quadripapillatus sp. nov. and M. jeyporeghatiensis sp. nov. occur in deciduous forests with brownish gravel-loamy soils. Here we provide the detailed description of the external and internal characteristics of the new species along with the illustrations of the key characters. With the new findings, the range of Megascolex genus has been extended further north in the less explored Eastern Ghats Hills of India. With this discovery, the total number of Megascolex species has increased to 70, of which 34 are found in India. Annelida, biodiversity, endemic, Oligochaeta, Peninsular India, taxonomy  Ayusmita Naik, S. Prasanth Narayanan, Sharat Kumar Palita, A.P. Thomas and R. Paliwal. 2024. Two New Species of the Genus Megascolex Templeton, 1844 (Clitellata, Megascolecidae) from the Eastern Ghats of Odisha State, India. Zootaxa. 5424(5); 569-580. DOI: 10.11646/zootaxa.5424.5.5 | ||||
| 2:25p | [Botany • 2024] Gladiolus adanus (Iridaceae: Crocoideae) • A New Species from Türkiye
Abstract Gladiolus adanus is introduced to the scientific world as a new species from Adana/Tufanbeyli/Türkiye. In this study, description and illustration, diagnostic morphological characters, habitat, distribution, ecological characteristics, conservation status, seed micromorphological characters (LM and SEM) and comparisons with close species are given. Adana, Anatolia, Gladiolus kotschyanus, Gladiolus alanyensis, new taxon, seed, taxonomy, Monocots    İsmail Eker and Mehmet Sağıroğlu. 2024. Gladiolus adanus (Iridaceae, Crocoideae), A New Species from Türkiye. Phytotaxa. 641(3); 210-21. 8DOI: doi.org/10.11646/phytotaxa.641.3.3 |
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