Climate change may drive the distribution of tribe Zyginelline pests in China and the Indo-China Peninsula to shift towards higher latitude river-mountain systems.

BACKGROUND: Tribe Zyginelline leafhoppers can transmit plant viruses and are important pests that affect agriculture, forestry, and animal husbandry, causing serious economic losses. The potential distribution patterns of Zyginellini will change under climate change. Therefore, the best-performing random forest and maximum entropy models among 12 commonly used ecological niche models, alongside an ensemble model, were selected to predict the changes in habitat suitability distribution of Zyginellini under current and future climate scenarios [represented by two shared socio-economic pathways (SSPs), namely SSP126 and SSP585, for three periods (2050s, 2070s, and 2090s)] in China and the Indo-China Peninsula for the first time. RESULTS: The results revealed that the distribution of Zyginellini was mainly dominated by minimum temperature of coldest month. Under current and future climate scenarios, Zyginellini was mostly distributed southeast of the 400 mm equivalent precipitation line in China, and Vietnam. Under the future SSP126 scenario, the alert areas will mainly be concentrated in Hunan, Jiangxi, Zhejiang, Anhui, and Hebei in China, alongside Myanmar and Thailand in the Indo-China Peninsula. Meanwhile, in the SSP585 scenario, the alert areas in China will increase, whereas there will be little change in the Indo-China Peninsula. Interestingly, from the current to the future, the cores of Zyginelline distribution occurred around rivers and mountains, and shifted from Guizhou along the Yuanjiang River system to higher latitudes in Hunan. CONCLUSION: Zyginellini prefers higher latitude river-mountain systems under climate change. Our results will contribute to effective pest control strategies and biogeographical research for Zyginellini alongside other Cicadellidae insects. © 2023 Society of Chemical Industry.

Two new species of the genus Kapsa Dworakowska from the karst area of Southwest China (Hemiptera: Cicadellidae: Typhlocybinae).

The leafhopper genus Kapsa Dworakowska, 1972 contains 32 species, mainly known from the Oriental Realm. Two new species collected from Huajiang Town, Guizhou Province, China are described and illustrated, Kapsa huajiangensis sp. n. and Kapsa uniaxialis sp. n. A key to distinguish all the Chinese species of the nominotypical subgenus is given.

Insulin-Like ILP2 Regulates Trehalose Metabolism to Tolerate Hypoxia/Hypercapnia in Tribolium castaneum.

RNAi was used to downregulate the expression of insulin-like peptides (ILP2), with air-modulation, and high-concentration CO2 stress, in the larvae of Tribolium castaneum. We assessed the changes in carbohydrate-related content, trehalase activity, and the expression levels of trehalose pathway genes. And pupation, adult emergence, pupation rate, and mortality were assessed. There was a significant change in the expression of ILPs in T. castaneum, at a certain concentration of CO2. ILP2 RNAi did not alter the trehalose content significantly, however, the glycogen and glucose content increased significantly. High-concentration CO2 stress altered the trehalose content and reduced the glycogen and glucose content. The expression levels of TPS and TRE2 were up-regulated by hypoxia/hypercapnia and dsILP2 combination, with the increase of CO2 concentration, other trehalase genes begin to respond successively. ILP2 knockout raised the mortality and reduced the pupation rate and eclosion rate in CO2. Understanding the insulin pathway responses to hypoxic stress induced by a high concentration of CO2 would further elucidate the mechanisms underlying trehalose metabolism in insects.

Two new species of the genus Tautoneura Anufriev from Karst area in Southwest China (Hemiptera: Cicadellidae: Typhlocybinae).

Two new species of the leafhopper genus Tautoneura Anufriev from Karst areas in Southwest China are described and illustrated, Tautoneura aureomarginalis sp. nov. and Tautoneura lageniformis sp. nov. A key to distinguish the Chinese species of the genus is given.

Two new species of the genus Arboridia Zachvatkin from China (Hemiptera: Cicadellidae: Typhlocybinae).

Two new species of the leafhopper tribe Erythroneurini from Guizhou province, China, Arboridia (Arboridia) huajiangensis sp. nov. and Arboridia (Arborifera) changlingensis sp. nov. are described and illustrated. The ovipositor of A. huajiangensis sp. nov. is photographed and described. A key distinguishing all known species of the genus in China is provided.

A new leafhopper genus of Erythroneurini (Hemiptera, Cicadellidae, Typhlocybinae) from karst area in southwestern China

ABSTRACT Guizhou is regarded as one hotspot for China's Erythroneurini diversity, from where numerous rare new species have been, or are being, described. A new genus and species of Erythroneurini from Huajiang, Guizhou, China, Anuihuajianga pyramidalis gen. et sp. nov. are described and illustrated. The new genus is characterized by subgenital plate extremely short, with long macrosetae dorsally at base, and small teeth-like setae at apex. The characteristic aedeagus shaped like two overlapping cones can also easily distinguish it from other genera. In general, this study further enriches the diversity of Erythroneurini in southwestern China.

Two new species of Erythroneurini from China (Hemiptera, Cicadellidae, Typhlocybinae).

Two new species of Erythroneurini from Guizhou Province, China are reported. Empoascanara wengangensis sp. n. and Thaia xiaguensis sp. n. are described and illustrated.

New species and two new records of Erythroneurini from China (Hemiptera, Cicadellidae, Typhlocybinae).

In the present paper, one new species and two new records of Erythroneurini from Guizhou Province, China are reported. The new species, Seriana bacilla sp. n. is described and illustrated. A key to distinguish all species of the genus is given. Another two species newly recorded from China, Empoascanara gracilis Dworakowska, 1992 and Tautoneura mayarami Mathew Ramakrishnan, 1996, are redescribed and illustrated.

One new genus and species of Typhlocybinae (Hemiptera: Cicadellidae) from Southwest China.

A new genus, Paraahimia gen. n., and a new species, P. luodianensis sp. n. from Guizhou Province in Southwest China of the subfamily Typhlocybinae are described and illustrated.

One new species and new record of the leafhopper genus Watara Dworakowska from Thailand (Hemiptera: Cicadellidae: Typhlocybinae: Erythroneurini).

Morphological characteristics for identification of the leafhopper genus Watara Dworakowska are described and a key to all known species is provided. One new species, Watara longiprocessa sp. n., is added and one previously described species recorded from Thailand for the first time, Watara cordata Zhang Yang, 2011 rec. n., is illustrated.

Contribution to knowledge of Typhlocybinae (Hemiptera: Cicadellidae) in Thailand: first record of genus Arboridia Zachvatkin with description of three new species and a new synonymy.

Three new species, Arboridia (Arboridia) magna sp.nov., A. (Arborifera) mira sp.nov. and A. (Arboridia) sexprocessa sp.nov. from Phitsanulok, Thailand are described and illustrated. A key for the identification of species of Arboridia from Thailand is provided. Arboridia (Arboridia) koreana Oh & Jung 2015 is synonymised with A. (Arboridia) agrillacea (Anufriev 1969).

Two new species of the genus Kabakra Dworakowska from Thailand (Hemiptera: Cicadellidae: Typhlocybinae).

The leafhopper genus Kabakra was established with Kabakra augusta from Vietnam as its type species by Dworakowska (1979). Later, another two species were described from India (Sohi & Mann 1992, Mathew & Ramakrishnan 1996). The genus was reviewed by Cao et al. (2012), who redescribed the genus and added three new species from China and Thailand. So far, six species have been reported, all from the Oriental region (see Dmitriev, 2016). In the present paper, two new species, K. chaiyaphuma and K. sakona spp. nov. are described and illustrated, with a key and a checklist to all known species of Kabakra.

New additions to the leafhopper genus Salka Dworakowska (Hemiptera: Cicadellidae: Typhlocybinae) from Hainan and Henan Provinces of China.

The leafhopper genus Salka Dworakowska, 1972 belongs to the Typhlocybinae tribe Erythroneurini with Zygina nigricans Matsumura, 1932 as its type species. The known species of this genus are distributed in the Oriental and Palearctic regions. Recently, it was reviewed by Zhang et al. (2009), Ohara (2012) and Song & Li (2012). Seventy-eight species are known, including 36 species from China. In this present work, two new species from China are described and illustrated. All specimens examined are deposited to the collection of the Institute of Entomology, Guizhou University, China (GUGC).

Review of the genus Arboridia Zachvatkin (Hemiptera: Cicadellidae: Typhlocybinae), with description of two new species from China.

The genus Arboridia Zachvatkin is reviewed, including two new species Arboridia cincta sp.nov. and Arboridia ochracea sp.nov., from Henan province, China. A detailed morphological description and illustrations of the two new species are provided. A key to all known species from China is given.

Five new species of Qadria Mahmood (Hemiptera: Cicadellidae: Typhlocybinae) from China.

Five new leafhopper species, Qadria bannaensis, Q. daliensis, Q. dongfanga, Q. guiyanga and Q. cucullata spp. nov. from Yunnan, Hainan and Guizhou Prov. of China are described and illustrated, and a key to all species of the genus Qadria is provided.

Two new species of Empoascanara Distant (Hemiptera: Cicadellidae: Typhlocybinae) from Yunnan Province, China.

Two new species, Empoascanara conchata, E. longiaedeaga spp. nov. from Yunnan are described and illustrated, and a key to the species recorded from China is provided.

A new erythroneurine leafhopper genus from China (Hemiptera: Cicadellidae: Typhlocybinae).

A new genus of tribe Erythroneurini from China, Laciniata gen. nov. is described and illustrated based on type species L. lijianga sp. nov.

Some new species and new record of the genus Arboridia Zachvatkin (Hemiptera: Cicadellidae: Typhlocybinae) from six provinces of China.

In the present paper, nine new species, Arboridia anteoculara, A. baiyunensis, A. reniformis, A. lunula, A. cuihuashana, A. paraprocessa, A. echinata, A. tridentata, A. zhenyuana spp. n. and a new record, A. agrillacea from China, are described and illustrated and a key for identification of Chinese species is provided.