Revision of the genus Psalitrus d'Orchymont from Southern India and Sri Lanka (Coleoptera: Hydrophilidae: Omicrini)

Abstract. Eight new species of Psalitrus are described: P.besucheti, P.coccinelloides, P.decoratus and P.silvestris from Southern India and P.loebli, P.mahanuwara, P.serendibensis and P.veddha from Sri Lanka. The two Psalitrus known previously from India, P.championi and P.fallax , are redescribed and lectotypes and paralectotypes are designated. For each species the aedeagus and female ectodermal genitalia are figured. For the first time among Hydrophiloidea species characters have been found in female ectodermal genitalia, thanks to staining with chlorazol black dye. The best biometric characters are selected by multiple-discriminant analysis and an identification key is given. A list of the known Psalitrus species is given.     

Jacquinia pauciflora (Theophrastaceae), a new species from Puerto Rico

A new species,Jacquinia pauciflora, is described from subtropical moist forest on karst hills (mogotes) in northwestern Puerto Rico.Jacquinia pauciflora is similar toJ. stenophylla Urban, from which it differs in several floral and leaf characters, but is possibly most closely related toJ. umbellata A. DC. A key to the species ofJacquinia occurring in Puerto Rico is provided.     

An aberrant species of Nipponocercyon from Sichuan, China (Coleoptera, Hydrophilidae, Sphaeridiinae)

A detailed examination of specimens of Cryptopleurum sichuanicum Ryndevich, 2005 from high altitudes of Sichuan Province, China, revealed that the species belongs in the genus Nipponocercyon Satô, 1963 previously endemic to Japan. The species is here transferred in Nipponocercyon, and Nipponocercyon sichuanicus (Ryndevich, 2005), comb. n. is redescribed and compared with Nipponocercyon shibatai Satô, 1963. The male genitalia of Nipponocercyon sichuanicus is described for the first time. An adapted diagnosis of Nipponocercyon is provided, and reasons for the inclusion of Nipponocercyon sichuanicus into Nipponocercyon and the general distribution of the genus are discussed.     

A new coptoclavid larva (Coleoptera: Adephaga: Dytiscoidea) from the Middle Jurassic of China,and its phylogenetic implication

Daohugounectes primitivus, a new genus and species of coptoclavid beetles, is described from 67 fossil larvae from the Jurassic locality of Daohugou, northeastern China. It differs from other coptoclavids in the combination of the following characters: lateral lobes of nasale present; legs relatively short, with tarsi flat and slightly dilated; abdominal tergite VIII almost circular; derivative of abdominal segment IX present; urogomphi short; and helical thickening of tracheae weak. Most of these features are plesiomorphic for the family Coptoclavidae and the superfamily Dytiscoidea. Among dytiscoids, a derivative of abdominal segment IX is present only in the larvae of the recently discovered relic family Aspidytidae.     

Four New Ladybug Species Belonging to Decadiomus Chapin (Coleoptera: Coccinellidae) from Puerto Rico

While searching for native natural enemies attacking invasive insect pests in Puerto Rico, we found four undescribed ladybug species belonging to the Caribbean ladybug genus Decadiomus Chapin. In this article, we describe the following species from Puerto Rico: Decadiomus seini n. sp., Decadiomus ramosi n. sp., Decadiomus hayuyai n. sp., and Decadiomus martorelli n. sp. Illustrations of the dorsal habitus, shape of prosternal carinae, and drawings of male and female genitalia are presented. We also present a key for Diomini of Puerto Rico and discuss their importance as potential biocontrol agents.     

Review of the Berosus Leach of Venezuela (Coleoptera, Hydrophilidae, Berosini) with description of fourteen new species

The species of the water scavenger beetle genus Berosus Leach occurring in Venezuela are reviewed. Thirty-six species are recorded, including fifteen new species, fourteen of which are described here as new: Berosus araguasp. n., Berosus asymmetricussp. n., Berosus capanaparosp. n., Berosus castaneussp. n., Berosus corozosp. n., Berosus ebeninussp. n., Berosus garciaisp. n., Berosus humeralissp. n., Berosus jolyisp. n., Berosus llanensissp. n., Berosus megaphallussp. n., Berosus ornaticollissp. n., Berosus repertussp. n., and Berosus tramidrumsp. n. The fifteenth new species, known from a single female, is left undescribed pending the collection of males. Twelve species are recorded from Venezuela for the first time: Berosus ambogynus Mouchamps, Berosus consobrinus Knisch, Berosus elegans Knisch, Berosus geayi d'Orchymont, Berosus ghanicus d'Orchymont, Berosus guyanensis Queney, Berosus holdhausi Knisch, Berosus marquardti Knisch, Berosus olivae Queney, Berosus reticulatus Knisch, Berosus wintersteineri Knisch, and Berosus zimmermanni Knisch.     

Additions to the review of Chinese Enochrus,with description of a new species (Coleoptera,Hydrophilidae, Enochrinae)

A new species, Enochrus (Methydrus) limbourgi sp. n., is described from Jiangxi Province, Southeast China, and illustrated. Subgenus Enochrus s. str. Thomson, 1859 is recorded for the first time in China, based on the record of Enochrus (s. str.) melanocephalus (Olivier, 1792) from Inner Mongolia. The male of Enochrus (Hydatotrephis) liangi Jia & Zhao, 2007 is described for the first time.     

A new poroid species of Resupinatus from Puerto Rico, with a reassessment of the cyphelloid genus Stigmatolemma

A fungus with gelatinous poroid fruiting bodies was found in Puerto Rico and determined by macro- and micromorphology to be most similar to members of the lamellate agaric genus Resupinatus. This species is described as a new species, Resupinatus porosus. Phylogenetic analyses of ribosomal DNA sequences support the inclusion of this fungus in the clade containing Resupinatus, and indicate that this monophyletic group also includes members of Asterotus and the cyphelloid genus Stigmatolemma. Resupinatus porosus is another example of tropical poroid representatives of lamellate agaric genera. Resupinatus is emended to include species with poroid (R. porosus) or merulioid (R. merulioides) hymenophore as well as those with laterally stipitate (Asterotus) or cyphelloid (Stigmatolemma) fruiting bodies. Seven new combinations in Resupinatus are proposed to accommodate well-known species of Stigmatolemma.     

A description of the first instar larva of Promecognathus Chaudoir (Coleoptera: Carabidae)

The first instar larva of Promecognathus laevissimus (Dejean) is described, representing the first species of Promecognathus known in the larval stage. The larva is autapomorphic in having: (1) additional setae, often in great number, on many sclerites of the body, (2) a transverse, not bulbous, sensory area located ventrally and laterally at the apex of antennomere III, and (3) the marginal area of the mesonotum, metanotum and abdominal tergites I-VI more expanded than usual in carabid larvae. No evidence was found from the larval morphology of P.laevissimus to indicate the sister group of the Promecognathini.     

A new genus and species of 'giant hutia' (Tainotherium valei) from the Quaternary of Puerto Rico: an extinct arboreal quadruped?

A large incomplete rodent femur from a Quaternary cave deposit near Barahona, Puerto Rico, is established as the holotype of Tainotherium valei , a new extinct genus and species. Although biogeographic and body size similarities suggest that it may be related to the Puerto Rican giant hutia Elasmodontomys , the Antillean large-bodied rodent family Heptaxodontidae is now interpreted as invalid, and it is impossible to assign Tainotherium to a particular caviomorph family in the absence of associated craniodental material. Tainotherium differs from other West Indian species in possessing a large femoral head, a proximally angled femoral neck, a short greater trochanter and a medially positioned lesser trochanter unconnected by an intertrochanteric crest, and a transversely flattened, anteroposteriorly bowed shaft lacking well-defined ridges. These characters are all associated with arboreal life habits in other mammal groups. The Puerto Rican land mammal fauna was dominated by a rodent radiation occupying a wide variety of niches before human arrival in the West Indies, but although arboreality is correlated with increased likelihood of survival in Quaternary mammalian extinction events, all of this fauna is now extinct. It is unlikely that decreasing aridity and the reduction of Puerto Rican savanna-type environments at the end of the Pleistocene contributed to the extinction of the arboreal Tainotherium , and habitat destruction by pre-Columbian Amerindians may instead have been responsible.     

West Indian novelties I: a new species of Marsdenia (Asclepiadaceae) from Puerto Rico and a new name for a Jamaican species of Calyptranthes (Myrtaceae)

The new speciesMarsdenia woodburyana from southwestern Puerto Rico is described, illustrated, and contrasted to its putatively closest relative. The new nameCalyptranthes proctorii is provided for the later homonymCalyptranthes uniflora Proctor.

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Resumen  En el presente artículo, la nueva especieMarsdenia woodburyana es descrita, ilustrada y comparada con su pariente mas cercano. Adicionalmente, se provee el nuevo nombreCalyptranthes proctorii (Myrtaceae) para reemplazarCalyptranthes uniflora Proctor, un homónimo posterior.

     

New water scavenger beetles (Coleoptera: Hydrophilidae) from the mesozoic of Mongolia

A new genus and two new species of water scavenger beetles, Hydrophilopsia bontsaganica, sp. nov. and Prospercheus cristatus, gen. et sp. nov., are described from the Upper Jurassic and Lower Cretaceous of Mongolia. The systematic position of the new genus is discussed.     

日本伪瓢虫--福建新记录种

笔近期应邀到厦门郊区某企业化验室调查室内发生的害虫。据该化验室人员介绍,有一种害虫不断从隔墙缝中爬出,墙台、地板每天都可采到。笔现场观察,该隔墙位于化验室中央,为半墙结构,墙心为木龙骨钉成的框架,墙体外部两面用塑钢封闭,缝隙处用玻璃胶堵封,但尚可见部分小缝隙,虫子就是从此处爬出的。     

中国广东优树甲属一新种(鞘翅目:拟步甲科)

记述采自中国广东的优树甲属1新种:高氏优树甲Uenostrongylium gaoi Lin&Yuan sp.nov.,该种因鞘翅刻点上缘具小颗粒而与浙江的粗皱优树甲Uenostrongylium scaber Yuan&Ren,2018相似.文中提供了新种的整体图和特征图.     

A new species of Psathyrella (Agaricales,Coprinaceae) from Mexico with discussions on the known species

Psathyrella hypertropicalis, a new species, is described from a high mountain (Cofre de Perote) in the State of Veracruz, Mexico above the subtropical zone. This species is intermediate betweenP. velutina of the temperate regions andP. sepulchralis from the subtropical regions of Mexico. A list of the 26 species ofPsathyrella of Mexico is presented, of which 21 are from the tropics and subtropics, three from the temperate regions (P. velutina, P. spadicea, andP. hypertropicalis), and two with a broad distribution (P. candolleana andP. disseminata). Eleven are only known from Mexico.