[Herpetology • 2026] Ovophis langbianus • A New Species of the Ovophis tonkinensis species complex (Serpentes: Viperidae) from the Langbian Plateau, southern Vietnam

Ovophis langbianus

Poyarkov, Idiiatullina, Ustinova, Bragin, Le, Pawangkhanant, Pham, Suwannapoom, David, Vogel & Nguyen, 2206

 

Langbian Mountain Pitviper | Rắn lục núi Langbian || DOI: doi.org/10.3897/herpetozoa.39.e206094

Abstract

A new species of the genus Ovophis Burger in Hoge & Romano-Hoge, 1981, is described from the Langbian Plateau, southern Vietnam, based on an integrative taxonomic approach combining morphological and molecular evidence. Ovophis langbianus sp. nov. is distinguished from its congeners by a unique combination of diagnostic morphological characters and by significant genetic divergence in the mitochondrial cytochrome b gene. Phylogenetic analyses recover the new species as the sister lineage of O. tonkinensis (Bourret), from which it differs in body proportions, head morphology, color pattern, and several meristic characters. Multivariate analyses of morphological variation further support the distinctiveness of the new species, with specimens of Ovophis langbianus sp. nov. and O. tonkinensis forming two well-separated groups in morphospace and exhibiting significant differences in centroid positions. The new species is currently known only from montane evergreen forests of the Langbian Plateau at elevations of approximately 800–2,230 m asl. The recognition of Ovophis langbianus sp. nov. further emphasizes the taxonomic complexity of the O. tonkinensis species group and, together with previous molecular evidence for a distinct Cao Bang (Vietnam)-Guangxi (China) lineage, highlights the need for a comprehensive reassessment of species boundaries within the complex.

Key Words: Biogeography, molecular phylogeny, morphology, mtDNA, Ovophis langbianus sp. nov., southern Annamite Mountains, systematics

Ovophis langbianus sp. nov.

Diagnosis. Ovophis langbianus sp. nov. can be distinguished from all other congeners by the following combination of characters: (1) TaL/TL ratio 0.14–0.18 in males and 0.12–0.14 in females; (2) internasals usually in contact, rarely separated by one small scale; (3) second supralabial bordering loreal pit; (4) dorsal scale rows 25 (21, 23, 27)–21 (23, 25)–19 (15, 17); (5) ventrals 129–138; (6) dorsal scales strongly keeled; (7) subcaudals 36–44, all single; (8) fourth supralabial larger than third; (9) dorsal surface of head uniformly ...

Ovophis langbianus sp. nov. in life from Langbian Plateau, Vietnam — Lam Dong Province: Bidoup-Nui Ba NP: A. VRTC NAP-18223, adult male, holotype; Di Linh Commune: B. Dorsal view of ZMMU Re-18511, adult male, paratype; C. Head in lateral view of the ZMMU Re-18511; D. ZMMU Re-18512, adult male, paratype; E. Head in lateral view of the ZMMU Re-18512; F, G. Two adult individuals, sex undetermined. Dak Lak Province: — Chu Yang Sin NP: H. ZMMU Re-14068, adult male, paratype; I. Head in dorsal view of the ZMMU Re-14068.

Photographs by A.M. Bragin (A), N.A. Poyarkov (B, C, H, I), P. Pawangkhanant (D, E), and H.N.X. Nguyen (F, G).

Etymology. The specific epithet “langbianus” is a masculine Latin adjective derived from the name of the Langbian Plateau, the broader geographic region containing the type locality and the currently known distribution of the new species. The name highlights the biogeographic isolation of the Langbian Plateau, an important center of montane endemism in Indochina. 

We suggest the following common names for the new species: “Langbian Mountain Pitviper” (in English), “Rắn lục núi Langbian” (in Vietnamese), “Лангбианский горный щитомордник” (Langbianskiy gornyi schitomordnik, in Russian), and “Ovophis de Langbian” (in French).

 Nikolay A. Poyarkov, Sabira S. Idiiatullina, Darya A. Ustinova, Andrey M. Bragin, Son Xuan Le, Parinya Pawangkhanant, Hieu Minh Pham, Chatmongkon Suwannapoom, Patrick David, Gernot Vogel, Tan Van Nguyen. 2206. A New Species of the Ovophis tonkinensis species complex (Serpentes, Viperidae) from the Langbian Plateau, southern Vietnam. Herpetozoa. 39: 325-342. DOI: doi.org/10.3897/herpetozoa.39.e206094 [25-08-2026]

[Botany • 2026] Sonerila namii (Melastomataceae: Sonerileae) • A New Species from Central Highlands, Vietnam

 

Sonerila namii  C. H. Nguyen, Aver. & C. W. Lin, 

in Nguyen, Averyanov et Lin. 2026.

DOI: doi.org/10.14258/turczaninowia.29.2.11 

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Abstract

A new species, Sonerila namii, is described from Gia Lai Province in the Central Highlands of Vietnam. The new species shares several morphological similarities with S. repens but differs in having a stem covered with golden-brown to maroon hispid or hispid-hirsute hairs (vs. white woolly), a leaf blade bearing white hirsute or gland-tipped hirsute hairs on both surfaces (vs. pubescent with simple hairs), about 6 pairs of secondary veins (vs. 2 or 3 pairs), a hypanthium with white hispid or gland-tipped hispid hairs and minute glandular trichomes (vs. woolly simple hairs), and petals up to 2.3 cm long (vs. up to 1.2 cm). According to the IUCN criteria, it may tentatively be assessed as Least Concern (LC).

Keywords: endemism, flora of Vietnam, Melastomataceae tribe Sonerileae, plant diversity, plant taxonomy

Sonerila namii:
 A – habit; B, B’ – portions of leaf, adaxial and abaxial surfaces; C, D, E – indumentum of reproductive structures: C – villous-hirsute or gland-tipped hirsute indumentum on leaf, D – minutely glandular trichomes on vegetative parts, E – gland-tipped hispid on hypanthium and abaxially of petals; F, F’ – flower, frontal and side views; G, G’ – stamens, frontal and side views; H – hypanthium; I – longitudinal section of ovary.

Drawing by Che Wei Lin from the holotype NHC-20251015010.

Sonerila namii:
A – habit and habitat; B – habit; C – flowering branch; D – leaves; E – portions of leaf, adaxial surface; F – same, abaxial surface; G – hypanthium, petals, stamens, and styles; H – longitudinal section of ovary; I – longitudinal section of immature fruit; J – cross section of immature fruit.

Photos A by Tinh Van Lam; photos B – J by Cuong Huu Nguyen of plants used for the preparation of type herbarium specimen NHC-20251015010.

Sonerila namii C. H. Nguyen, Aver. et C. W. Lin, sp. nov. 

Etymology. The specific epithet honors a postgraduate student from Vietnam National Forestry University, Duong Van Nam, who collected and provided specimens of this new species. 

 

Cuong H. Nguyen, Leonid V. Averyanov and Che W. Lin. 2026. Sonerila namii (Melastomataceae, Sonerileae), A New Species from Central Highlands, Vietnam. Turczaninowia. 29(2); 110–115. 

DOI: doi.org/10.14258/turczaninowia.29.2.11 

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[Botany • 2026] Sporoxeia furcillispinosa (Melastomataceae) • A New Species from North-western Vietnam

  

Sporoxeia furcillispinosa T.C. Hsu, T.V. Do & C.W. Lin, 

in Hsu, Do et Lin. 2026.  

DOI: doi.org/10.5735/085.063.0125  

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Abstract

Sporoxeia furcillispinosa T.C. Hsu, T.V. Do & C.W. Lin (Melastomataceae) is described as a new species from Mt Fansipan in the Hoang Lien National Park on the Hoang Lien Son Range, north-western Vietnam. It resembles S. vietnamensis but can be distinguished from it by having stems that are sharply angled, quadrangular or narrowly 4-winged (vs. obtusely quadrangular); two inflorescences per axil (vs. one), which are short racemose to subumbellate (vs. umbellate); bracts that are ovate to broadly ovate, up to 15 mm long (vs. subulate, ca. 3 mm long); a hypanthium covered with multi-branched or unbranched, fleshy soft spines (vs. irregular thick spines); and anthers of the inner and outer whorls equal or subequal in size (vs. strongly unequal).

Sporoxeia furcillispinosa.
 A and B: Habit and habitat (photographed at the type locality on 14 July 2025). — C: Inflorescence, also showing bracts and a portion of stem. — D and E: Portions of leaf, adaxial surface. — F: Hypanthium and calyx lobes. — G: Flower, frontal and lateral views.

Sporoxeia furcillispinosa T.C. Hsu, T.V. Do & C.W. Lin, sp. nova 

 

Etymology. The specific epithet is derived from the Latin furcilla (little fork) and spinosa (thorny), referring to the characteristic irregularly branched soft spines densely covering the surface of the hypanthium, which distinguish this species from its relatives.

Tian-Chuan Hsu, Truong Van Do and Che-Wei Lin. 2026. Sporoxeia furcillispinosa (Melastomataceae), A New Species from North-Western Vietnam. Annales Botanici Fennici. 63(1); 183-189 DOI: doi.org/10.5735/085.063.0125 [15 July 2026]

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[Mollusca • 2026] Fansipanica milae, Vinatachea porcellana, ... • New taxa of Camaenidae (Gastropoda: Stylommatophora) from northern Vietnam

Fansipanica milae Páll-Gergely & Dedov,

   

in Páll-Gergely, Gojšina et Dedov, 2026.

DOI: doi.org/10.3897/zookeys.1280.185160

 

Abstract

The following new taxa are described from northern Vietnam: Fansipanica milae Páll-Gergely & Dedov, gen et sp. nov., Ducanhia Páll-Gergely, gen. nov. (type species: Helix balansai Morlet, 1886), Vinatachea porcellana Páll-Gergely, sp. nov. The reproductive anatomy of all three species is described. Helix (Chloritis) gereti Bavay & Dautzenberg, 1900 is moved to Fansipanica gen nov., and Camaena delsaerdti Thach & F. Huber, 2018 is moved to Vinatachea.

Key words: Anatomy, Fansipan Mountains, new species, systematics, taxonomy

Fansipanica milae gen. et sp. nov. 
A–C. Living specimen, D. Habitat. 

 

Fansipanica milae Páll-Gergely & Dedov, gen et sp. nov., 

Ducanhia Páll-Gergely, gen. nov. 

(type species: Helix balansai Morlet, 1886), 

Vinatachea porcellana Páll-Gergely, sp. nov. 

Barna Páll-Gergely, Vukašin Gojšina and Ivailo Dedov. 2026. New taxa of Camaenidae from northern Vietnam (Gastropoda, Stylommatophora). ZooKeys. 1280: 365-392. DOI: doi.org/10.3897/zookeys.1280.185160 [28 May 2026]

[Botany • 2024] Meiogyne konkakinhensis (Annonaceae) • A New Species from the central highlands of Vietnam

 

Meiogyne konkakinhensis B.H.Quang & Tagane,

in Quang, Tagane, Nagahama, Fujiwara, Yoneoka, Binh et Oguri, 2024. 

DOI: 10.11646/phytotaxa.652.1.7

Meiogyne Miquel (1865: 12; Annonaceae), with 33–39 species, are trees or shrubs characterised by distinctive corrugated grooved structure at the base of the adaxial surface of the inner petals, axillary or sometimes cauliflorous flowers and oblong multi-seeded indehiscent monocarps (van Heusden 1994, Johnson et al. 2019, Jaikhamseub et al. 2022). The species are collectively distributed in southern India, southern Central China, Southeast Asia, Australia, Melanesia and western Polynesia (van Heusden 1994, Thomas et al. 2012, POWO 2024). In Vietnam, six species of Meiogyne are known (Bân 2000, Jaikhamseub et al. 2022): M. monogyna (Merrill 1942: 163) Bân (1974: 1778), M. subsessilis (Ast 1938: 90) Sinclair (1956: 14), M. hainanensis (Merrill 1925: 131) Bân (1973: 1148), M. rubra Jaikhamseub, Damth. & Chaowasku in Jaikhamseub et al. (2022: 223), M. virgata (Blume 1825: 14) Miquel (1865: 12) and M. vietnamica Jaikhamseub, T.A.Le & Chaowasku in Jaikhamseub et al. (2022: 225), although Jaikhamseub et al. (2022) excluded M. virgata because they could not confirm any Vietnamese specimens. 

During our botanical expedition in Kon Ka Kinh National Park, Gia Lai Province, Central Highland, Vietnam, in 2022, we encountered an unknown species of Meiogyne in primary broad-leaved evergreen forests. After a careful examination of the literature of the genus in Vietnam and surrounding countries (Ast 1938, Bân 2000, van Heusden 1994, Johnson et al. 2019, Jaikhamseub et al. 2022) and herbarium specimens including digitised images from FOF, FU, HN, K, KAG, MAK, P and VNM, we concluded that it was an undescribed species, and we here describe it as new to science.

Flora, Indochina, endemic species, Magnoliales, taxonomy, plant diversity, Magnoliids

Meiogyne konkakinhensis.
A. Flowering branch, view from underneath. B. Flowering branch after anthesis. C. Flower, front view. D. Flower after anthesis, side view. E, F. Fruiting branches, with one monocarp.

Photos of Oguri et al. Q362 when it was alive, taken by B.H. Quang.

Meiogyne konkakinhensis.
 A. Flowers, front view, at early stage of anthesis (left), late stage of anthesis (right). B. Outer petals, adaxial (right) and abaxial (left) surfaces. C. Inner petals, adaxial (left) and abaxial (right). D. Flower, bottom view. E. Flower with petals removed showing sepals, stamens and stigmas. F. Sepals, abaxial (left) and adaxial (right) sides. G. Stamens, carpels. H. Stamens. I. Carpels.

Photos of Oguri et al. Q362 when it was alive, taken by B.H. Quang.

Meiogyne konkakinhensis B.H.Quang & Tagane, sp. nov. 

The new species is similar to Meiogyne rubra in its relatively small leaf size and reddish purple petals at maturity, but it is easily distinguished by yellowish brown hairy midrib on the adaxial surface of lamina (glabrous in M. rubra), smaller petals (outer petals 8.0–18.0 × 5.0–8.0 mm, inner petals 7.0–16.0 × 3.1–7.0 mm vs. 30.0–33.0 × 7.5–10.0 mm and 26.5–30.5 × 7.0–8.0 mm), and fewer and smaller stamens (76–80, 1.0–1.4 mm long vs. ca. 118, 1.5–2.2 mm long), fewer carpels (7–9 vs. 10–11) and more ovules per ovary (7–8 vs. 4).

Etymology:—Named for the Kon Ka Kinh National Park.  

Vernacular name:—Thiểu nhụy kon ka kinh (Vietnamese).

Bui Hong Quang, Shuichiro Tagane, Ai Nagahama, Tao Fujiwara, Katsuhiro Yoneoka, Tran Duc Binh and Emiko Oguri. 2024. Meiogyne konkakinhensis (Annonaceae), A New Species from the central highlands of Vietnam.  Phytotaxa. 652(1); 78-82. DOI: 10.11646/phytotaxa.652.1.7

[Herpetology • 2026] Megophrys praestes • A Comprehensive Review of the Megophrys (Brachytarsophrys) carinensis group (Amphibia: Megophryidae) reveals A New giant horned frog from Indochina and Evidence for Taxonomic Inflation in the feae Group

  

Megophrys praestes

Mahony, Phimmachak, Seateun, Sivongxay, Hoang, Le, Streicher, Rowley & Stuart, 2026

 

 DOI: doi.org/10.11646/zootaxa.5854.1.1  

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Abstract

The Megophrys subgenus Brachytarsophrys includes the largest species of Asian horned frogs north of the Malay Peninsula. The subgenus comprises two clades known as the feae group and carinensis group. Though the Chinese members of the feae group have been the focus of recent taxonomic studies, little is known of the two members of the carinensis group, M. carinensis and M. intermedia, from Thailand, Myanmar, Laos and Vietnam. Megophrys carinensis was long considered to be widespread in China until, relatively recently, some populations were found to represent species of the feae group, indicating that there is widespread confusion regarding the identification of M. carinensis. No sequence data have been available for M. carinensis and M. intermedia from their respective type localities to verify their genetic identities.

In this study, a near complete review of the global knowledge of the carinensis group is provided based on the literature, supplemented with multi-locus molecular phylogenetic analyses and a comprehensive morphological dataset for 35 adult specimens and five juveniles. Recently collected samples from 12 specimens of M. intermedia (including from the Langbiang Plateau) were sequenced, and a minimally destructive archival DNA Illumina protocol was used to obtain the complete mitochondrial genome for a 137-year-old ethanol preserved “topotype” of M. carinensis.

Molecular phylogenetic analyses identified two deeply divergent lineages in M. intermedia, one from the type locality of M. intermedia and a second representing all other previously sequenced populations of M. “intermedia” from outside the upper reaches of the Langbiang Plateau. The morphological data for adult frogs also strongly supported the recognition of two diagnosable taxa within M. intermedia sensu lato. Adults differed in morphometrics and qualitative characteristics, but the tadpoles differed slightly in morphometrics but not in any qualitative characteristics. Detailed taxonomic redescriptions are provided for both M. carinensis and M. intermedia, and a new species of Megophrys from the carinensis group is described. A comprehensive literature review of these three species is provided, identifications of populations are updated, and new information is given on behaviour and habitat association. A counter argument to the recent proposal to treat some of Malcolm Smith’s species epithets as nouns in apposition to the gender of the genus name is provided, clarifying the spelling of M. intermedia (and proposing to reject Alcalus pullus as the valid name for A. tasanae), and correcting the gender of M. carinensis and M. platyparieta. We highlight extensive misunderstandings in the literature regarding the identities of the type series of both M. carinensis and M. intermedia, and revise the geographic distributions of all species based on published and unpublished evidence (including online citizen science data).

Published records of M. “carinensis” from China, Laos, Vietnam, and India are individually reviewed to clarify the taxonomic identities of many of the populations. All Chinese and Vietnamese populations are suggested to represent feae group taxa, and we provide the most complete account of the distribution of this group. Fundamental errors are identified in the original descriptions of all recent feae group species (M. popei, M. orientalis, Megophrys guilinensis comb. nov., Megophrys qiannanensis comb. nov., Megophrys wenshanensis comb. nov., and Megophrys wui comb. nov.), surmising that there is currently insufficient evidence to morphologically diagnose the marginally genetically divergent named populations M. orientalis, M. guilinensis comb. nov. and M. wui comb. nov. as distinct from M. popei, and propose their synonymy. Beyond updates to the identification of populations resulting from this proposed synonymy, provisional updates are recommended for the identifications of more than 30 additional known Chinese populations.

Megophrys intermedia is now range-restricted to upper elevations on the Langbiang Plateau. Based on a review of the species’ extinction threat status, we recommend that it should potentially be considered Endangered, further highlighting the urgent need for comprehensive modern taxonomic redescriptions of historically described species in Southeast Asia.

Amphibia, Anura, Megophryinae, toad, taxonomy, systematics, nomenclature, literature review, natural history, phylogenetics, conservation, Endangered, China, Myanmar, Thailand, Laos, Vietnam

Megophrys praestes sp. nov. 

 

STEPHEN MAHONY, Somphouthone PHIMMACHAK, Sengvilay SEATEUN, Niane SIVONGXAY, Huy Duc HOANG, Duong Thi Thuy LE, Jeffrey W. STREICHER, Jodi J. L. ROWLEY and Bryan L. STUART. 2026. A Comprehensive Review of the Megophrys (Brachytarsophrys) carinensis group (Amphibia: Megophryidae) reveals A New giant horned frog from Indochina and Evidence for Taxonomic Inflation in the feae Group.  Zootaxa. 5854(1); 1-166. DOI: doi.org/10.11646/zootaxa.5854.1.1 [2026-07-24] 

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[Ichthyology • 2026] Nanosphronemus gemma • A remarkable New Genus and Species of miniature osphronemid (Anabantoidei: Osphronemidae) from Vietnam

Nanosphronemus gemma

 Britz, Tan & Rüber, 2026

Raffles. Bull. Zool. 74; 

Abstract

 A new genus and species of miniature labyrinth fish of the family Osphronemidae, Nanosphronemus gemma, is described from Vietnam. It differs from all other genera of anabantoids by a unique dorsal- and anal-fin ray count, a unique colour pattern and a number of unique or highly unusual skeletal characters. Our molecular phylogenetic analysis indicates that Nanosphronemus is the sister group of the genus Trichopsis, the croaking gouramis. 

Key words. Anabantoidei, labyrinth fishes, miniaturisation, gourami

Nanosphronemus gemma, live colouration, not preserved, all ca. 16 mm SL in lateral view.
a, putative female above, note absence of red stripe in dorsal half; b, putative male in normal colouration, note presence of red stripe above and darker pigmentation below midlateral stripe; c, putative male in breeding colouration, note overall darker colouration of body and also fins, presence of bright red stripe and highly iridescent scales in mid-lateral stripe and below on head and body.

Nanosphronemus gemma, not preserved, all ca. 18 mm SL.
a, mature female with eggs; b, in breeding colouration and typical oblique courtship position, c, approaching bubble nest under plant leaf; d, adding air bubbles and embedding eggs into bubble nest.

Nanosphronemus, new genus  

Diagnosis. Nanosphronemus differs from all other genera in the suborder Anabantoidei by its unique count of XIX– XXI+2–3 dorsal-fin rays (vs. I–XVIII+ 4–14, rarely XIX in some specimens of Macropodus ocellatus) and XX– XXIV+4–5 anal-fin rays (vs. I–XVII+8–38, rarely XX–XXII in some specimens of Macropodus spp.), the presence (vs. absence) of a series of anteroventrally directed processes off the distal part of caudal haemal arches, Baudelot’s ligament ...

Etymology. The new genus name is derived from the Ancient Greek word, νάνος, meaning dwarf, combined with the name Osphronemus, the type genus of the family Osphronemidae, to which this new genus belongs. Gender: masculine. The name alludes to the tiny size of this new fish, which makes it one of the smallest anabantoids known to date.

Nanosphronemus gemma, new species 

 Suggested common name. Jewel Gourami.

Distribution. Unclear at present: reported from undisclosed area near Huế in Central Vietnam. 

Etymology. The species name is derived from the Latin word for jewel, ‘gemma’, alluding to the stunning colouration of sexually mature males. A noun in apposition.

 

Ralf BRITZ, Heok Hui TAN and Lukas RÜBER. 2026. Nanosphronemus gemma, A remarkable New Genus and Species of miniature osphronemid from Vietnam (Teleostei: Anabantoidei: Osphronemidae). Raffles. Bull. Zool. 74; 606–623. 

 

[Herpetology • 2026] Amolops minhlei • A New Species of Amolops (Anura: Ranidae) from Vu Quang National Park—An ASEAN Heritage Park of Vietnam

  

Amolops minhlei

A.V. Pham, C. V. Hoang, T. Q. Nguyen, V. T. H. Nguyen, T. T. T. Nguyen, K. D. Nguyen, Thai, N. V. Hoang & C. T. Pham, 2026 

 

 DOI: doi.org/10.11646/zootaxa.5760.2.4  

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Abstract 

A new species of Amolops is described from Vu Quang National Park, Ha Tinh Province, North-central Vietnam based on morphological and molecular differences. Morphologically, Amolops minhlei sp. nov. is distinguishable from its congeners by a combination of the following morphological characteristics: SVL 31.8–35.8 mm in males, 36.7–45.8 mm in females; head longer than wide; vomerine teeth absent; snout long (SE/SVL 0.16–0.17 in males, 0.16 in females); tympanum distinct, round (TD/ED 0.41–0.42 in males, 0.40–0.43 in females); skin smooth; supratympanic fold indistinct; dorsolateral fold present; webbing formula I0–0II0–1/2III0–1/2IV1/2–0V; dorsum olive green or reddish brown with a few dark spots; a brown dorsolateral stripe extending from behind eye to above vent; dorsal surface of fore- and hind-limbs light grey with brown crossbars, throat, chest and belly white; males with external vocal sac and nuptial pad on finger I; and flanks grey brown with small white glandular spot. In phylogenetic analyses, the new species is strongly supported as a member of the A. monticola group. However, the new species differs from other members of the A. monticola group by 10.00–19.66% pairwise genetic divergence in the mitochondrial ND2 gene fragment and 1.56–6.67% in the mitochondrial 16S gene fragment.

Amphibia, 16S rRNA, Amolops monticola group, Ha Tinh Province, molecular phylogeny, ND2, taxonomy

Amolops minhlei sp. nov.

Ếch bám đá minh

ANH VAN PHAM, CHUNG VAN HOANG, TRUONG QUANG NGUYEN, VAN THI HONG NGUYEN, THUY THU THI NGUYEN, KY DANH NGUYEN, TOAN CANH THAI, NGOC VAN HOANG and CUONG THE PHAM. 2026. A New Species of Amolops (Anura: Ranidae) from Vu Quang National Park—An ASEAN Heritage Park of Vietnam.  Zootaxa. 5760(2); 225-247. DOI: doi.org/10.11646/zootaxa.5760.2.4 [2026-02-23]

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[Arachnida • 2025] Pinelema aurata, P. cavernalis, P. onganh, ... • Hidden in the Dark: Five New Species of Pinelema (Araneae: Telemidae) from Caves in northern Vietnam with Remarks on the Genus Diversity and Conservation

Pinelema spp. in life. 
[A-C] Pinelema onganh, new species;
[D-F] P. cavernalis, new species;
[G-H] P. aurata, new species; [I] P. huifengi, new species 

Ballarin, Nguyen & Eguchi, 2025

RAFFLES BULLETIN OF ZOOLOGY. 73: 

 Abstract 

 Five new cave-dwelling species of the genus Pinelema Wang & Li, 2012 from northern Vietnam are described based on both sexes: Pinelema onganh, new species; P. cavernalis, new species; P. huifengi, new species; and P. nagaoi, new species, from Cao Bang Province, and P. aurata, new species, from Dien Bien Province. Three of these species exhibit marked morphological adaptations to subterranean life, including the absence of eyes, depigmentation, and leg elongation. For each species, detailed images of their diagnostic characters are provided. When possible, barcode sequences of the new species are obtained and compared with published Pinelema sequences in a pairwise analysis to assess the interspecific genetic variation of the genus. The significance of Pinelema species diversity in the Southeast Asian karst regions is also briefly discussed, along with conservation challenges linked to their strict habitat requirements.

 Key words. COI barcode, conservation, diversity, Southeast Asia, subterranean environment

Pinelema spp. in life. 
A, P. onganh, new species, male holotype; B, ditto, adult female; C, ditto, juvenile;
 D, P. cavernalis, new species, male holotype; E, ditto, adult female; F, ditto, adult female with egg sac;
G, P. aurata, new species, adult female; H, ditto, adult female with egg sac; I, P. huifengi, new species, adult female.

Francesco Ballarin, Anh D. Nguyen and Katsuyuki Eguchi. 2025. Hidden in the Dark: Five New Species of Pinelema (Araneae: Telemidae) from Caves in northern Vietnam with remarks on the Genus diversity and conservation. RAFFLES BULLETIN OF ZOOLOGY. 73: 548–567. [17 October 2025]

[Botany • 2026] Begonia thanhquyetii (Begoniaceae, sect. Petermannia) • A New Species from Quang Tri province, Central Vietnam

Begonia thanhquyetii  C.H. Nguyen, T.A. Le & C.W. Lin,

in Duong, C. H. Nguyen, Le, Bui, Dinh, Dang, Y. T. Nguyen, Tran, T. H. Nguyen, Averyanov et Lin, 2026.

DOI: doi.org/10.11646/phytotaxa.762.2.8 

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Abstract

Begonia thanhquyetii, a new species from central Vietnam, is herein described and illustrated. It is morphologically most similar to B. baik in its creeping habit, rugose ovate leaves, and protogynous inflorescences. However, it differs in several key morphological characters, including stipules hirsute on the abaxial surface (vs. glabrous), bracts lacking glandular hairs along the margins (vs. glandular-ciliate), a pair of bracteoles present near the apex of the pistillate pedicel (vs. bracteoles absent), abaxial tepals of both staminate and pistillate flowers hirsute (vs. glabrous), and densely hirsute ovary (vs. glabrous). Following the IUCN Red List Categories and Criteria (Version 16), B. thanhquyetii is provisionally assessed as Least Concern (LC), pending further field surveys to clarify its distribution and population status.

Eudicots, biodiversity, endemism, Flora of Vietnam, Indochina, taxonomy

Begonia thanhquyetii sp. nov.

 

NAM VAN DUONG, CUONG HUU NGUYEN, ANH TUAN LE, DOI THE BUI, DIEN DINH, HA VAN DANG, YEN THI NGUYEN, HUNG THE TRAN, TUAN HOANG NGUYEN, LEONID V. AVERYANOV and CHE WEI LIN. 2026. Begonia thanhquyetii (B. sect. Petermannia, Begoniaceae), A New Species from Quang Tri province, Central Vietnam.  Phytotaxa. 762(2); 177-184. DOI: doi.org/10.11646/phytotaxa.762.2.8 [2026-06-16] 

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[Botany • 2025] Newmania bambusifolia (Zingiberaceae: Zingiberoideae) • A New Species from Hon Ba Nature Reserve, southern Vietnam

 

Newmania bambusifolia Škorničk., Vuong & Bao, 

in Truong, Q.B. Nguyen, Q.C. Nguyen et Leong-Škorničková, 2025. 

Gardens’ Bulletin Singapore. 77(1);   

ABSTRACT    

 Newmania bambusifolia Škorničk., Vuong & Bao (Zingiberaceae:

Zingiberoideae), a new ginger species discovered in Hon Ba Nature Reserve, Khanh Hoa

Province in southern Vietnam is described and illustrated here with notes on distribution,

ecology, phenology, preliminary IUCN assessment, and etymology. It is distinct from all

known congeners by the very narrow leaf-blades, resembling those of bamboos. This discovery

increases the total number of species in Newmania to seven. We include an updated key to the

genus accommodating this novelty.

Keywords. Eastern Indochina, gingers, Khanh Hoa Province, Vulnerable, Zingibereae

Newmania bambusifolia Škorničk., Vuong & Bao in situ at Hon Ba Nature Reserve.
From the type, Truong et al. BV 1774. (Photo: B.V. Truong)

Newmania bambusifolia Škorničk., Vuong & Bao. 
A. Habit (inset: detail of cross-section of rhizome). Scale bar: 30 cm. B. Leaf blades from various parts of the leafy shoot (from the left: distal, middle part of pseudostem (two blades), basal). C. Pseudostem showing ligules, pulvinate petioles and bases of leaf blades. D, E. Detail of leaf sheaths and ligules. F. Rhizome with an inflorescence.

All from the type, Truong et al. BV 1774. (Photos: B.V. Truong)

Newmania bambusifolia Škorničk., Vuong & Bao.   
A. Distal part of the flower in different views. B. Details of stamen and stigma (left: entire stamen in adaxial view; top right: anther with part of filament in abaxial and lateral views; bottom right: details of stigma). C. Flower with bract, pedicel and part of rachis, and dissection below (from left: bract, bracteole, calyx, dorsal corolla lobe in abaxial view, lateral corolla lobes (one in adaxial and one in abaxial view), staminodes (one in abaxial and one in adaxial view), and labellum. Tweezers seen across the labellum were used to flatten it.

 All from the type, Truong et al. BV 1774. (Photos: B.V. Truong)

Newmania bambusifolia Škorničk., Vuong & Bao, sp. nov. 

Unique in the genus by its prominently narrow, bamboo-like leaf-blades and dark purple labellum with overlapping lobes. Flowers are most similar to Newmania cristata by the yellow to greenish floral tube and filament, but differ by having a small anther crest less than 1 mm long with entire rounded apex (vs anther crest 4.6–5 mm long with a bilobed apex).

Etymology. The specific epithet refers to the unusually narrow, bamboo-like leaf blades.  

Truong, B.V., Nguyen, Q.B., Nguyen, Q.C. & Leong-Škorničková, J. 2025. Newmania bambusifolia (Zingiberaceae: Zingiberoideae), A New Species from Hon Ba Nature Reserve, southern Vietnam. Gardens’ Bulletin Singapore. 77(1); 113 - 120.

[Botany • 2026] Lasianthus sondangii (Rubiaceae) • A New Species with a unique spiciform inflorescence from Central Vietnam

Lasianthus sondangii Bao, Vuong & V.C.Nguyen, 

in Tran, V. C. Nguyen, Luong, Phan-Thi, H. T. Nguyen, Truong et Q. B. Nguyen, 2026. 

taiwania.ntu.edu.tw/abstract/2193

Abstract

Lasianthus sondangii, a new species from Lasianthus section Nudiflorae, is described from Khanh Hoa Province, Central Vietnam. It can be distinguished from other Lasianthus species in Vietnam and surrounding countries by having narrowly triangular stipules, spiciform inflorescences with two or three reduced cyme secondary axes, purple flowers, and clavate calyx lobes with revolute margins. A detailed description of the new species, color plates, distribution, habitat and preliminary conservation assessment are provided.

Keyword: Indochina, Khanh Hoa, Lasiantheae, plant conservation, plant diversity, sect. Nudiflorae

Lasianthus sondangii Bao, Vuong & V.C.Nguyen.
A. A flowering and fruiting branch. B. Apical shoot showing young leaves and stipule. C. Inflorescence and infructescence. D. Infructescence (side view) E. Flowers buds (mature (left) and immature (right)). F. Open flower in different views (side view (left) and top view (right)). G. Corolla artificially cut open, showing hairs at the throat and stamens. H. Flower with the corolla removed to show the ovary, calyx, style, and stigma (left) and longitudinal section that shows the calyx lobes, and the ovule (right). I. Mature fruit (left) and the cross section of fruit shows pyrenes and albumen of seeds (right).

Drawn by Phan Thi Thanh Nha from type QB137.

Lasianthus sondangii Bao, Vuong & V.C.Nguyen.
A. Habit and habitat. B. A flowering and fruiting branch. C. Apical shoot showing young leaves and stipule. D. Stipule. E. Leaves (adaxial surface (left) and abaxial surface (right)). F. Infructescence. G. Inflorescences. H. Inflorescence bearing open flowers.

(A, B, E–H by Nguyen Van Canh; C, D by Nguyen Quoc Bao from type QB137).

Lasianthus sondangii Bao, Vuong & V.C.Nguyen, sp. nov. 

Diagnosis: The new species is distinct from other Lasianthus species in Vietnam and Indo-China by its spiciform, sympodial, reduced-cymose inflorescence; purple flowers (including calyx), calyx lobes obovate with revolute margins.

Thi Thuy Nhan Tran, Van Canh Nguyen, Van Dung Luong, Thanh Nha Phan-Thi, Hoa Thi Nguyen, Ba Vuong Truong and Quoc Bao Nguyen. 2026. Lasianthus sondangii (Rubiaceae, Lasianthus section Nudiflorae), A New Species with a unique spiciform inflorescence from Central Vietnam. Taiwania. 71(3); 488 - 494. DOI: 10.6165/tai.2026.71.488 [26 May 2026] 

 https://taiwania.ntu.edu.tw/abstract/2193