ZooKeys最新文献

Eucyclopssperatus (Lilljeborg, 1901) (Copepoda, Cyclopoida, Cyclopidae) was studied using various methods. Molecular genetic methods (comparison of COI and ITSn molecular markers) have shown that this species represents a species complex, and the following methods were used to search for differences between the species: analysis of qualitative and quantitative characters, linear morphometrics, landmark-based geometric morphometrics, and integumental pore pattern of the cephalothorax. Eucyclopssibiricus sp. nov. from Middle Siberia is described. The two studied species can be considered pseudocryptic; the main morphological difference between the species is the number of setules on the inner side of the first and second exopod segments of the fourth pair of swimming legs: E.sibiricus sp. nov. has 6-10 and 7-17 setules, respectively; E.speratus has 0-3 and 0-6 setules, respectively. The morphometry and integumental pore pattern of the cephalothorax were ineffective for identification and separation of species. The existing previous records of E.speratus were also analyzed, and the records of this species in the Irkutsk region (Russia), as well as in Japan and Korea, are attributed to E.sibiricus sp. nov.

The species of the genus Megadrypta Sciaky & Anichtchenko, 2020 are reviewed. A new species M.maozhoui sp. nov. is described from Sichuan and Yunnan provinces, China (type locality: Tiantaishan, Qionglai City, Sichuan). New provincial records of M.mirabilis Sciaky & Anichtchenko, 2020 are reported as well. A key of the genus Megadrypta is provided.

Mutatus gen. nov. is described from southwest China, including four new species: M.gelao sp. nov. (♂♀, Guizhou Province), M.tianyan sp. nov. (♂♀, Hubei Province), M.tujia sp. nov. (♂♀, Hubei Province), and M.yintiaoling sp. nov. (♂, Chongqing Municipality). This new genus can be differentiated from other phrurolithid genera by the male palp which has a prolateral tegular apophysis and tegular sheet, and by a small protuberance on the female epigynal plate.

A taxonomic review of the seashore-inhabiting Medon Stephens along the East Asian coasts is presented based on morphological and molecular characters (COI). Specimens of Medoncalculosus Ahn & Jeon, sp. nov. and M.tomokoae Shibata & Fujimoto are extremely similar to each other, although there are differences in the form and structure of the aedeagus. Detailed comparison of morphological characters and molecular analyses based on genetic divergence and gene tree monophyly for species delimitation support the validity of the new species. Intraspecific genetic divergence of COI using uncorrected p-distance among Medon individuals ranged from 0% to 0.79%, while interspecific divergence among three Korean Medon species ranged from 7.74% to 11.69%. Morphological characters of M.calculosus Ahn & Jeon, sp. nov., M.prolixus (Sharp), and M.tomokoae are compared. The new species is described with illustrations of diagnostic characters and a key to species of the East Asian coastal Medon is presented.

Ladybird beetles (Coleoptera, Coccinellidae) are a species-rich, ecologically diverse and economically important group of insects. A new ladybird genus of Scymnini, Reniscymnus gen. nov., is described from China and Laos, along with two new species, Reniscymnuscordatus Peng & Chen, sp. nov. and Reniscymnusexplanatus Peng & Chen, sp. nov. This newly identified genus can be distinguished from the remaining members of the tribe Scymnini by its short antenna consisting of eight antennomeres and an inflated antennal club bearing two extremely long setae; the narrow frons; the slightly tapering apically terminal maxillary palpomere; as well as the recurved and laterally almost complete abdominal postcoxal lines that enclose a distinctly wide area. Detailed morphological descriptions, illustrations, and a key to identify these two species within the new genus are provided. Morphological similarities and relationships of the new genus with other genera of Scymnini are discussed.

Taxonomic notes on the genus Apiocephalus Gahan, 1898 are provided. The genus is newly recorded in China with the description of a new species, Apiocephalusyangmingae sp. nov., from the Qinling Mountains. Brief redescriptions of Apiocephaluspunctipennis Gahan, 1898 and Apiocephaluslicheneus Gahan, 1906 are presented, along with their holotype photographs. A key to the known species is given.

A new species of the Cnemaspissiamensis group is described from Wang Khrachae District, Kanchanaburi Province, western Thailand based on morphological and molecular data. The new species, Cnemaspisenneaporus Rujirawan, Aksornneam & Aowphol, sp. nov., is distinguished from other species in the C.siamensis group by having the combination of SVL 42.2 mm in adult male (n = 1), 43.7 mm in adult female (n = 1); eight supralabials; seven or eight infralabials; ventral scales smooth; nine continuous precloacal pores in male; 17 or 18 paravertebral tubercles linearly arranged; tubercles on lower flanks present; lateral caudal furrows present; no caudal tubercles in the lateral furrows; ventrolateral caudal tubercles present on original portion of tail; caudal tubercles not encircling tail; subcaudals smooth; no enlarged median subcaudal row; two postcloacal tubercles on each side of tail; no shield-like subtibial scales; subtibial scales smooth; no enlarged submetatarsal scales; 26-28 subdigital lamellae on the fourth toe; sexually dimorphic for dorsal and ventral colour pattern; prescapular marking absent; gular marking absent; and yellow colouration in life on all ventral surfaces of head, body and tail in adult male. Phylogenetically, the new species is recovered as the sister taxon to C.huaseesom, but the two species are separated by 8.3-9.4% uncorrected pairwise genetic divergences in the mitochondrial NADH dehydrogenase subunit 2 gene and flanking tRNAs.

The systematics of humble-in-appearance brown spiders ("marronoids"), within a larger group of spiders with a modified retrolateral tibial apophysis (the RTA Clade), has long vexed arachnologists. Although not yet fully settled, recent phylogenomics has allowed the delimitation and phylogenetic relationships of families within marronoids to come into focus. Understanding relationships within these families still awaits more comprehensive generic-level sampling, as the majority of described marronoid genera remain unsampled for phylogenomic data. Here we conduct such an analysis in the family Cybaeidae Banks, 1892. We greatly increase generic-level sampling, assembling ultraconserved element (UCE) data for 18 of 22 described cybaeid genera, including all North American genera, and rigorously test family monophyly using a comprehensive outgroup taxon sample. We also conduct analyses of traditional Sanger loci, allowing curation of some previously published data. Our UCE phylogenomic results support the monophyly of recognized cybaeids, with strongly supported internal relationships, and evidence for five primary molecular subclades. We hypothesize potential morphological synapomorphies for most of these subclades, bringing a robust phylogenomic underpinning to cybaeid classification. A new cybaeid genus Siskiyu gen. nov. and species Siskiyuarmilla sp. nov. is discovered and described from far northern California and adjacent southern Oregon and a new species in the elusive genus Cybaeozyga, C.furtiva sp. nov., is described from far northern California.

In this study, two new species of the leaf-beetle genus Paleosepharia Laboissière, 1936 from China are described: P.subrubra Feng, Yang & Ge, sp. nov. and P.emeiensis Feng, Yang & Ge, sp. nov. Meanwhile, Paleosephariatruncata Laboissière, 1936 is first recorded for China. Additionally, Monoleptabicavipennis Chen, 1942 and Monoleptaquadricavata Chen, 1976 are redescribed and proposed as new combinations under Paleosepharia. A key to the Chinese species of Paleosepharia is also provided.

Bark beetles are among the primary drivers of tree mortality in coniferous forests worldwide. Individuals belonging to the order Coleoptera were identified across different forest areas in Honduras. Descriptive statistics were used to calculate the number of families, subfamilies, genera, and species collected per department. Moreover, the barcoding approach was used by amplifying and sequencing the mitochondrial COI gene. The intraspecific genetic diversity of Ipsapache was also analyzed. 1,131 individuals were examined and 27 genera were identified. Most of the specimens were identified as belonging to the genus Ips, accounting for 53.2% of the total. Xyleborus accounted for 16.5% and Temnoscheila accounted for 10%. Fewer than four individuals were found for fifteen genera. 68% of the specimens were identified to the species level, and all the specimens were identified to the genus level. Ips, Temnoscheila, Xyleborus, Hypothenemus, and Pityophthorus exhibited the most extensive geographic distribution among the sampled sites. At the genus level, Olancho, El Paraíso, and Copán displayed the highest diversity. This study also marks the first report of the genera Xylomeira and Stephanopachys in Honduran pine forests. Within I.apache, evidence of intraspecific genetic diversity was observed, although no population structure was detected. While this research provides an updated inventory of beetle species associated with Honduran coniferous forests, further taxonomic surveys and ecological studies are essential to better understand the spread and impact of bark beetles in pine ecosystems.