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Sunday, May 19th, 2024
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| 2:13p | [Diplopoda • 2024] Hyleoglomeris bomba, H. dracosphaera, H. krasoon, etc. • Six New Species of the Pill Millipede Genus Hyleoglomeris Verhoeff, 1910 (Glomerida: Glomeridae) in Thailand revealed by DNA-barcoding
Abstract Thai species of the pill millipede genus Hyleoglomeris Verhoeff, 1910 are reviewed, and an annotated catalogue is provided. Six new species from Thailand are described and illustrated based on morphological characteristics and molecular analyses: H. dracosphaera sp. n., H. nigromaculata sp. n., H. suwannakhuhensis sp. n., H. bomba sp. n., H. tongkerdae sp. n., and H. krasoon sp. n. They are morphologically similar, yet all can be separated based on their characteristic colour patterns, telopod structures and geographic distributions. Genetic differences in the dna barcode region confirm their full species statuses, with interspecific coi p-distances ranging from 9.01% to 16.51% dissimilarity. We also propose the following new synonym: H. hongkhraiensis Likhitrakarn, Golovatch & Panha, 2015 = H. cavicola Likhitrakarn, Golovatch & Panha, 2015 syn. n. This is based on the low genetic divergence observed between these two taxa (2.34% coi p-distance). A new distribution map of and a key to all Hyleoglomeris species presently known to occur in Thailand are also provided. Keywords: Hyleoglomeris; key; millipede; new species; taxonomy; Thailand    Hyleoglomeris dracosphaera Likhitrakarn, Sutcharit & Panha, sp. n. Name. To emphasize the orange body which, when rolled up into a sphere, resembles Dragon Balls, the magical artifacts in the Japanese manga and anime series Dragon Ball; adjective in feminine gender. Hyleoglomeris nigromaculata Likhitrakarn, Sutcharit & Panha, sp. n. Name. To emphasize the dark spots on the dorsum, adjective in feminine gender. Hyleoglomeris suwannakhuhensis Likhitrakarn, Sutcharit & Panha, sp. n. Name. To emphasize the type locality [Nong Bua Lamphu Province, Suwannakhuha District], adjective in feminine gender.  Hyleoglomeris bomba Likhitrakarn, Sutcharit & Panha, sp. n. Name. To emphasize the body coloration with contrasting black and yellow bands, resembling the typical color pattern of a bumblebee of the genus Bombus, a noun in feminine gender. Hyleoglomeris tongkerdae Likhitrakarn, Sutcharit & Panha, sp. n. Name. To honour Assistant Professor Dr. Piyoros Tongkerd, malacologist and lecturer at the Faculty of Science at Chulalongkorn University, who participated in collecting many millipede specimens, including the type series of this new species.  Hyleoglomeris krasoon Likhitrakarn, Sutcharit & Panha, sp. n. Name. To emphasize the word “krasoon” from the compound word “kingkeu krasoon” which means “pill millipede” in Thai, a noun in apposition. Natdanai Likhitrakarn, Ekgachai Jeratthitikul, Pichsinee Sapparojpattana, Warut Siriwut, Ruttapon Srisonchai, Parin Jirapatrasilp, Teerapong Seesamut, Pisit Poolprasert, Somsak Panha, and Chirasak Sutcharit. 2024. Six New Species of the Pill Millipede Genus Hyleoglomeris Verhoeff, 1910 (Diplopoda, Glomerida, Glomeridae) in Thailand revealed by DNA-barcoding. Contributions to Zoology. DOI: 10.1163/18759866-bja10062 กิ้งกือกระสุนส้มดราก้อนบอลล์ ???????????????????????????????????????? (draco = dragon มังกร, sphaera = sphere ทรงกลม) ค้นพบที่ถ้ำผาท่าพล อ.เนินมะปราง จ.พิษณุโลก กิ้งกือกระสุนน้อยลายจุดดำ ???????????????????????????????????????? ค้นพบที่นอกถ้ำเวฬุวัน อ.ด่านช้าง จ.สุพรรณบุรี กิ้งกือกระสุนน้อยสุวรรณคูหา ???????????????????????????????????????? ค้นพบที่นอกถ้ำในวัดถ้ำภูผาธรรมสถิต อ.สุวรรณคูหา จ.หนองบัวลำภู กิ้งกือกระสุนน้อยลายผึ้ง ???????????????????????????????????????? ค้นพบที่นอกถ้ำในวัดถ้ำพระผาคอก อ.เวียงชัย จ.เชียงราย กิ้งกือกระสุนน้อยทองเกิด ???????????????????????????????????????? ตั้งชื่อเป็นเกียรติแด่ ผศ.ดร.ปิโยรส ทองเกิด อาจารย์จากหน่วยปฏิบัติการซิสเทแมติกส์ของ กิ้งกือกระสุนน้อยกระสุน ???????????????????????????????????????? ตั้งชื่อตามคำไทย “กระสุน” ที่ใช้เรียกกิ้งกือกลุ่มนี้ ค้นพบที่วัดถ้ำน้ำผ่าผางาม อ.แม่พริก จ.ลำปาง | ||||||||
| 2:13p | [Ichthyology • 2024] Sinocyclocheilus guiyang • A New troglobitic Sinocyclocheilus species (Cypriniformes: Cyprinidae) from the upper Yangtze River Basin in Guizhou, South China
Abstract Sinocyclocheilus guiyang, a new troglobitic species from a subterranean tributary of the upper Yangtze Basin in Guiyang City, Guizhou Province, China is described in the present study. The new species is distinguishable from its congeneric species by a combination of the following characters: tip of maxillary barbel reaching to posterior edge of orbit; forehead horn absent; eye absent (or highly reduced) and tip of pectoral fins not significantly extending beyond the base of the pelvic fin. Molecular evidence, based on the mitochondrial cytochrome b (cytb) gene, further supports the validity of the species and also reveals its close relationship with S. cyphotergous, S. multipunctatus, S. punctatus and S. sanxiaensis. In addition, the new species faces a high risk of extinction, underscoring the urgency for habitat protection measures within its limited range. Key Words: cavefish, conservation, morphology, phylogenetic analysis, Yangtze River  
Sinocyclocheilus guiyang sp. nov. Diagnosis: Sinocyclocheilus guiyang is distinguishable from all other congeners by a combination of the following characters: tip of maxillary barbel not reaching to posterior edge of preoperculum, horn-like structure in forehead absent, eye absent or highly reduced, pectoral fin not significantly extending beyond base of pelvic fin. The major diagnostic characters for S. guiyang and related species are summarised in Table 3. ... Etymology: The location of the subterranean stream where this new species was first collected: Guiyang City, the capital of Guizhou Province, is directly utilised as a specific epithet. The common name proposed for the new species is ‘贵阳金线鲃’ (Guiyang Golden-line Barbel).
Wei-Han Shao, Guang-Yuan Cheng, Xiao-Long Lu, Jia-Jun Zhou and Zhi-Xuan Zeng. 2024. Description of A New troglobitic Sinocyclocheilus (Pisces, Cyprinidae) species from the upper Yangtze River Basin in Guizhou, South China. Zoosystematics and Evolution. 100(2): 515-529. DOI: 10.3897/zse.100.119520  | ||||||||
| 2:13p | [Herpetology • 2024] Takydromus guilinensis • A New Species of the Genus Takydromus (Squamata: Lacertidae) from Northeastern Guangxi, China
Abstract During our collecting trip to Guangxi in 2016, we collected ten specimens of the genus Takydromus from the suburb of Guilin, northeastern Guangxi, South China, and found that they did not belong to any currently known species. Here, we described this new species, Takydromus guilinensis sp. nov., based on morphological and mitochondrial DNA (CO1 and cyt b) data. This new species is a sister taxon to T. intermedius with a p-distance of 0.070 in CO1 and 0.080 in cyt b. These two p-distances exceed not only the minimum value (0.067) between T. septentrionalis and T. stejnegeri but also the minimum value (0.079) between T. intermedius and T. yunkaiensis. Morphologically, this new species differs from other currently recognized Takydromus species from the same clade, more evidently in the longitudinal rows of dorsal scales, transverse rows of scales at the mid-body and mensural variables. The description of Takydromus guilinensis sp. nov. increases the total number of Takydromus species to 25, of which 16 can be found in China. Takydromus guilinensis sp. nov. is currently known only from Guilin, Guangxi, South China, where it is sympatric with the other four Takydromus species (T. septentrionalis, T. kuehnei, T. sexlineatus and T. intermedius). Keywords: Lacertidae; molecular phylogenetic analysis; morphology; South China; Takydromus guilinensis sp. nov.; taxonomy
Takydromus guilinensis sp. nov. Diagnosis. A new small oviparous Takydromus species distinguished from all other currently known congeneric species with the following mensural and meristic characters. First, SVL 39.4–46.7 mm in adult males and 42.8–52.4 mm in adult females. Second, dorsal ground color brown; ventral surface white. Third, skull flattening (HL/HW = 1.8–2.0). Fourth, 32–36 longitudinal rows of dorsal scales. Fifth, 27–33 transverse rows of scales at the mid-body.
Etymology. The specific epithet is a Latinization of Guilin City, Guangxi, China. Kun Guo, Yong-Hao Hu, Jian Chen, Jun Zhong and Xiang Ji. 2024. A New Species of the Genus Takydromus (Squamata: Lacertidae) from Northeastern Guangxi, China. Animals. 14(10), 1402. DOI 10.3390/ani14101402 Simple Summary: The genus Takydromus (Squamata: Lacertidae) currently comprises 24 species distributed in East (Eastern Palearctic) and Southeast (Oriental) Asia. Of these 24 species, 15 can be found in China, 8 only in the Chinese mainland and adjacent countries or regions, 6 only in Taiwan and 1 (T. kuehnei) on both sides of the Taiwan Strait. Here, we described a new Takydromus species from the suburb of Guilin, northeastern Guangxi, South China, based on morphological and mitochondrial DNA data. From the phylogeny reconstructed with a mitochondrial DNA fragment (CO1 and cyt b), we know that the new species differs from its congeners and that it is a sister taxon to T. intermedius. Morphologically, the new species can be diagnosed from other Takydromus species from the same clade. Based on the above multiple lines of evidence, we suggest that this lacertid lizard from Guilin should be named as a new species, Takydromus guilinensis sp. nov. The discovery of this species increases the total number of Takydromus species to 25, of which 16 can be found in China. | ||||||||
| 2:15p | [Paleontology • 2024] Ophiactis hex • Fossil Evidence for the ancient link between clonal fragmentation, Six-fold Symmetry and an epizoic lifestyle in asterozoan echinoderms (Echinodermata: Asterozoa: Ophiuroidea)
Abstract Asexual reproduction by means of splitting, also called fissiparity, is a common feature in some asterozoan groups, especially in ophiactid brittle stars. Most fissiparous brittle stars show six instead of the usual five rays, live as epibionts on host organisms, and use clonal fragmentation to rapidly colonize secluded habitats and effectively expand the margins of their distribution area. While the biology and ecology of clonal fragmentation are comparatively well understood, virtually nothing is known about the evolution and geological history of that phenomenon. Here, we describe an exceptional fossil of an articulated six-armed brittle star from the Late Jurassic of Germany, showing one body half in the process of regeneration, and assign it to the new species Ophiactis hex sp. nov. Phylogenetic inference shows that the fossil represents the oldest member of the extant family Ophiactidae. Because the Ophiactis hex specimen shows an original six-fold symmetry combined with a morphology typically found in epizoic ophiuroids, in line with recent fissiparous ophiactid relatives, we assume that the regenerating body half is an indication for fissiparity. Ophiactis hex thus shows that fissiparity was established as a means of asexual reproduction in asterozoan echinoderms by the Late Jurassic. Keywords: Ophiuroidea, late Jurassic, fissiparous, phylogeny, Ophiactidae
Systematic palaeontology Class Ophiuroidea Gray, 1840 Superorder Ophintegrida O'Hara et al., 2017 Order Amphilepidida O'Hara et al., 2017 Superfamily Ophiactoidea Ljungman, 1867 Family Ophiactidae Matsumoto, 1915 Genus Ophiactis Lütken, 1856 Ophiactis hex sp. nov. Species diagnosis: Small ophiactid with six arms, dorsal side of disc with a dense cover of granules and spinelets; lateral arm plates with outer surface covered by small tubercles arranged in a faint vertical striation; arm spines large and slightly flattened; distalmost arm segments with at least one hook-shaped arm spine. Etymology: Species name (used as noun in apposition) referring to Hex, the organic/inorganic/magical super-computer of Terry Pratchett's Unseen University, capable of thinking the unthinkable.  Ben Thuy, Lea D. Numberger-Thuy, Jürgen Härer, Andreas Kroh, Viola Winkler and Günter Schweigert. 2024. Fossil Evidence for the ancient link between clonal fragmentation, Six-fold Symmetry and an epizoic lifestyle in asterozoan echinoderms. Proc. R. Soc. B. 291: 20232832. DOI: 10.1098/rspb.2023.2832 | ||||||||
| 2:15p | [Botany • 2024] Vaccinium dehongense (Ericaceae) • A New Species from western Yunnan, China
Abstract Vaccinium dehongense (Ericaceae), a new species from Yingjiang County of Yunnan Province, China is described and illustrated. This new species belongs to Vaccinium sect. Epigynium and is most similar to V. vacciniaceum, but differs from the latter in the subsessile leaves, the inflorescence usually developing at leafless nodes, the shorter pedicels and the filaments being ca. 1/3 length of the stamens. Since the type locality of this new species is very near the border between China and Myanmar, it is probably also distributed in the adjacent area of Myanmar. As no population assessment of this species in its whole distribution area is made, it is best to assign a conservation status of ‘Data Deficient’ (DD) for this species. Key words: Morphology, taxonomy, Vaccinieae, Yingjiang County
Vaccinium dehongense Y.H.Tong, sp. nov. Diagnosis: This new species is morphologically similar to V. vacciniaceum, especially its subspecies, V. vacciniaceum subsp. glabritubum P. F. Stevens (with a glabrous internal corolla surface), in having pseudo-verticillate leaves with a serrate margin and a rounded leaf base, glandular-setulose twigs with scattered lenticels, elongate racemose inflorescences with many flowers, narrowly triangular bracts and bracteoles and a glabrous internal corolla surface, but can be distinguished by subsessile (vs. with 1–4 mm long petioles) leaves, the inflorescences usually developing at leafless nodes (vs. axils of leaves), shorter pedicels (6–7.5 mm vs. 7–13 mm) and filaments being ca. 1/3 length of the stamens (vs. ca. 1/2). Etymology: The species epithet is derived from the type locality, Dehong Dai and Jingpo Autonomous Prefecture. Its Chinese name is given as 滇西越橘 (Pinyin: diān xī yuè jú). Yi-Hua Tong, Xing-Er Ye and Jing-Bo Ni. 2024. Vaccinium dehongense (Ericaceae), A New Species of Vaccinium sect. Epigynium from western Yunnan, China. PhytoKeys. 242: 31-37. DOI: 10.3897/phytokeys.242.121623 | ||||||||
| 2:18p | [Botany • 2022] Begonia parvibracteata (Begoniaceae, sect. Platycentrum) • A New Species from Guangxi of China
Abstract The previously reported begonias in a limestone forest of Guangxi mainly belong to Begonia sect. Coelocentrum Irmscher. In this article, we described and illustrated a new species in sect. Platycentrum (Klotzsch) A.DC., Begonia parvibracteata X.X.Feng, R.K.Li & Z.X.Liu, which was discovered in a karst forest of south-western Guangxi. The begonia shows high morphological similarity to B. subhowii S.H. Huang and B. psilophylla Irmscher, but differs from the latter two in its narrower oblique-ovate asymmetric leaf blade, 4 (occasionally 6) tepals of pistillate flower and smaller membranous inflorescence bracts. Molecular phylogenetic analysis, based on ITS sequence data, supports the new species as monophyletic and distinct from B. subhowii and B. psilophylla. Considering its narrow distribution and the disturbance of human activities, the conservation status of new taxon is evaluated as “Vulnerable” (VU B1, B2 ab (i, iv, v), D2) according to the IUCN Red List Categories and Criteria. Keywords: ITS, morphology, new taxon, southern China, taxonomy
 Begonia parvibracteata X.X.Feng, R.K.Li & Z.X.Liu, sp. nov. Chinese name: 小苞秋海棠 Diagnosis: Begonia parvibracteata morphologically resembles B. subhowii and B. psilophylla in rhizome and leaf characters. However, it has narrowly oblique-ovate asymmetric leaf blades, 4 (rarely 6) tepals in pistillate flowers and small (6–8 × 3–5 mm) bracts in inflorescences. These characters differ from the widely ovate leaf blades, 5 (rarely 6) tepals of pistillate flowers, and distinctly large bracts in inflorescences of B. subhowii. B. parvibracteata is dissimilar to B. psilophylla in its 4 (rarely 6) tepals in pistillate flowers and asymmetric, narrowly oblique-ovate leaf blade. Begonia parvibracteata forms a monophyletic group clustered with B. cucurbitifolia in the phylogenic tree, but the latter has nearly symmetric, 3–4 lobed leaf blade, 5-tepaled pistillate flower, definitely differing from the new species. Etymology: The specific epithet “parvibracteata” refers to the short small bracts of the new species. The Chinese name is given as “小苞秋海棠” (Begonia with small inflorescence bracts). Xin-Xin Feng, Xiao-Feng Huang, Yu-Ni Huang, Zhi-Xian Liu, Ren-Kun Li, Jin-Ye Zhou, Wei Guo, Xiao-Yan Chen and Dai-Ke Tian. 2022. Begonia parvibracteata, A New Species in Begonia sect. Platycentrum (Begoniaceae) from Guangxi of China, based on morphological and molecular evidence. PhytoKeys. 214: 27-38. DOI: 10.3897/phytokeys.214.90004 | ||||||||
| 2:26p | [Botany • 2023] Krenakanthus ribeiranus (Bromeliaceae: Bromelioideae) • A “hairy situation” in Minas Gerais, Brazil: A striking New Species of Krenakanthus covered with uniseriate trichomes
Abstract A new species of Krenakanthus, a member of the bromelioid “Cryptanthoid complex”, is described based on plants discovered through collaborative citizen science. Krenakanthus ribeiranus and its only congener K. roseolilacinus are endemic to the “João Pinto Center of Biodiversity”, a still poorly explored region with Campos Rupestres and associated vegetation in the Rio Doce Valley, in eastern Minas Gerais state, Brazil. The unusual combination of morphological characters of K. ribeiranus, highlighted by plant delicacy and almost all leaf and flower parts covered by uniseriate, hair-like trichomes, is illustrated and discussed in comparison with K. roseolilacinus, including leaf and seed anatomy, as well as pollen morphology. This micro-endemic species is assessed as Critically Endangered, reinforcing the need for strategy to protect the biodiversity of the region. The morphology of the new species validates and strengthens the diagnostic flower characters used in the circumscription of Krenakanthus, suggesting as secondary diagnostic characters the habit, stature, and leaf conformation. Keywords: Monocots, anatomy, Campos Rupestres, Cryptanthoid complex, João Pinto Center of Biodiversity, morphology, uniseriate trichomes
   
Elton M. C. Leme, Paulo M. Gonella, Dayvid R. Couto, Eduardo P. Fernandez, Jordano D. T. De Carvalho, Pedro S. De Almeida and Jorge E. A. Mariath. 2023. A “hairy situation” in Minas Gerais, Brazil: A striking New Species of Krenakanthus (Bromeliaceae: Bromelioideae) covered with uniseriate trichomes. Phytotaxa. 619(1); 39-62. DOI: 10.11646/phytotaxa.619.1.2   |
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