[Botany • 2026] Curcuma koonmeeana (Zingiberaceae, subgen. Hitcheniopsis) • A New endemic Species from Central Thailand

 Curcuma koonmeeana Saensouk, P.Saensouk & Boonma, 

in S. Saensouk, P. Saensouk, Boonma, Ruannakarn, Junsongduang et Setyawan. 2026.  

กระเจียวม่วงคูณมี  |  DOI: doi.org/10.3390/life16101623

Photographs by Thawatphong Boonma.

Abstract

Continued botanical exploration in previously insufficiently surveyed areas of Saraburi Province, Central Thailand, revealed an undescribed member of Curcuma subgen. Hitcheniopsis. This study aimed to formally describe the taxon, assess its morphological distinctiveness, evaluate its phenetic relationships, and provide a preliminary conservation assessment. Morphological observations were based on living and freshly collected material, herbarium specimens, protologues, and comparative taxonomic sources. Phenetic relationships among 11 taxa were assessed using 34 morphological characters, the Gower coefficient, UPGMA clustering, and principal coordinates analysis (PCoA). The new species, Curcuma koonmeeana Saensouk, P.Saensouk & Boonma, is distinguished from morphologically allied taxa by a unique combination of fertile-bract architecture, poorly developed coma bracts, well-exserted flowers, labellum morphology and indumentum, yellow markings, and anther-crest configuration. Phenetic analyses summarized overall morphological relationships among the sampled taxa, with Curcuma charanii Boonma & Saensouk showing the greatest Gower similarity to C. koonmeeana. The species is currently known from two populations along the same limestone mountain range and is provisionally assessed as Vulnerable (VU D1). Its recognition increases the known native diversity of subgen. Hitcheniopsis in Thailand to 31 taxa, comprising 30 species and one natural hybrid. The discovery highlights the continuing value of targeted botanical exploration and the need for habitat and population conservation.

Keywords: Curcuma; Hitcheniopsis; limestone; phenetic analysis; Phra Phutthabat; Saraburi; taxonomy

 Curcuma koonmeeana Saensouk, P.Saensouk & Boonma, sp. nov.:
(a) Habit. (b) Thyrse with flowers. (c) Front view of flower. (d,e) Coma bracts. (f) Lateral view of fertile bract. (g) Fertile bract. (h) Front view of anther. (i) Lateral view of anther. (j) Back view of anther. (k) Dorsal corolla lobe. (l) Lateral corolla lobes. (m) Cincinnus with bracteole and flower. (n) Lateral staminodes. (o) Labellum. (p) Flower with calyx and ovary.

Photographs by Thawatphong Boonma.

Curcuma koonmeeana Saensouk, P.Saensouk & Boonma, sp. nov.

Diagnosis. Curcuma koonmeeana is morphologically most similar to C. charanii in having short, non-creeping rhizome branches, glabrous laminae and fertile bracts, exserted flowers, and similarly coloured lateral staminodes, but differs in having an internally pale-yellow rhizome (vs. ivory), globose to subglobose tuberous roots (vs. fusiform), undulate lamina margins (vs. entire), fertile bracts with the lower ones obtrullate and the upper ones rhomboid to lanceolate (vs. broadly ovate), longer, well-exserted flowers (vs. exserted), narrower lateral staminodes with a broadly obtuse to occasionally acute apex (vs. broader, with a rounded apex), a larger, deeply bilobed labellum with a V-shaped sinus c. 8 mm deep (vs. emarginate, with a sinus 4–5 mm deep), and a white filament (vs. pale purple)  

Etymology: The specific epithet “koonmeeana” is named in honor of Mrs. Koonmee Saensouk, in recognition of her invaluable support and contributions behind the study of Zingiberaceae diversity in Thailand.   "กระเจียวม่วงคูณมี"

Surapon Saensouk, Piyaporn Saensouk, Thawatphong Boonma, Prasert Ruannakarn, Auemporn Junsongduang and Ahmad Dwi Setyawan. 2026. Continued Botanical Exploration Uncovers A New endemic Species of Curcuma subgen. Hitcheniopsis (Zingiberaceae) from Central Thailand. Life. 16(10), 1623. DOI: doi.org/10.3390/life16101623 [28 September 2026]

[Paleontology • 2026] Westlothiana lizziae • Evolution of Terrestrial Anatomy revealed by A derived Stem Tetrapod

 

Westlothiana lizziae  Smithson & Rolfe, 1990

in Igielman, Jenkins, Head, ... et Benson, 2026. 

DOI: doi.org/10.1038/s41586-026-11090-6 

Abstract

Tetrapods (limbed vertebrates) include lissamphibians and amniotes, and now comprise half of all vertebrate species, with particular importance on land. Limbs first appeared in stem tetrapods by the Late Devonian, 365 million years ago. However, many taxa either have limbs with fin-like functional anatomy or have secondarily lost them, raising questions about the ecological context and early evolution of the tetrapod limb6. Here we provide considerable new data on the enigmatic Early Carboniferous Westlothiana lizziae, widely cited as the earliest terrestrially adapted stem amniote7,8. We find unexpected plesiomorphies of the skull roof, palate, braincase and mandible, alongside aquatic adaptations, including an ossified internal gill skeleton and extensive denticles on the palate and mandible. These traits return Westlothiana as a stem tetrapod in our phylogenetic analyses, demonstrating that terrestrial adaptations such as an amniote-like pedal formula, loss of fin-like forelimb function and superficially claw-like terminal phalanges evolved in a mosaic fashion, and that these traits evolved in a transitional, amphibious context before the origin of the tetrapod crown group. Our findings reinforce recent suggestions of a taxonomically inclusive tetrapod-stem lineage, but also illuminate substantial gaps in anatomical knowledge, especially for small-bodied taxa, that obstruct our understanding of early tetrapod evolution.

 

Ben Igielman, Xavier Jenkins, Jason Head, Vincent Fernandez, Lucy Roberts, Timothy Smithson and Roger Benson. 2026. Evolution of Terrestrial Anatomy revealed by A derived Stem Tetrapod. Nature. DOI: doi.org/10.1038/s41586-026-11090-6 [30 September 2026]