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A new species of dialictus from sombrero island, anguilla (hymenoptera, halictidae).

ABSTRACT: A new species of Lasioglossum Curtis subgenus Dialictus Robertson (Halictinae, Halictini) is described and figured from a series of female and males collected on Sombrero Island, Anguilla; the northernmost island of the Lesser Antilles. Lasioglossum (Dialictus) sombrerensesp. n. is distinguished from its congeners and the name made available for a forthcoming work on the arthropod diversity of Sombrero Island.

SUBMITTER: Engel MS

PROVIDER: S-EPMC3082990 | biostudies-literature |

REPOSITORIES: biostudies-literature

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A new species of Microsphecodes from Jamaica (Hymenoptera, Halictidae).

Project description:A new species of the cleptoparasitic bee genus Microsphecodes Eickwort and Stage (Halictinae: Halictini) is described and figured from a male and female collected in Jamaica. Microsphecodes xaymacensis Engel, sp. n., is distinguished from its congeners on the basis of integumental coloration and sculpturing, and form of the male pygidial plate and genitalia.

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A new species of Habralictus Moure from Dominica, Lesser Antilles (Hymenoptera, Halictidae).

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New and little-known species of the genus Sphecodes Latreille (Hymenoptera, Halictidae) from Southeast Asia.

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A new Chlerogelloides from northeastern Brazil and French Guiana, with a key to the species (Hymenoptera, Halictidae).

Project description:A third species of the rare augochlorine bee genus Chlerogelloides Engel et al. (Halictinae, Augochlorini) is described and figured. Chlerogelloides nexosasp. n. is most similar to the type species, Chlerogelloides femoralis Engel et al., in that both have modified midlegs in the males. The former, however, can be distinguished on the basis of its terminalia, which in some respects more closely resembles those of Chlerogelloides simplex Engel and Brooks. Brief comments on the secondary features of males and relationships of the genus are provided. A key to the species of the genus is provided and floral records of Cordia nodosa Lam. (Boraginaceae) and Gonzalagunia dicocca Cham. & Schltdl. (Rubiaceae) are noted.

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A new species and a newly recorded subgenus of Lipotriches Gerstaecker, 1858 (Hymenoptera, Apoidea, Halictidae, Nomiinae) from China.

Project description:Two Chinese species of the genus Lipotriches Gerstaecker, 1858 are treated in this paper. Lipotriches (Lipotriches) guihongi Zhang & Niu, sp. nov. is recognized as a new species and Lipotriches (Maynenomia) nanensis (Cockerell, 1929) is a new species and subgenus record for China. The number of Chinese species of the subfamily Nomiinae and genus Lipotriches are updated to 47 and 15, respectively.

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Agapostemonfasciatus Crawford (Hymenoptera, Halictidae), a valid North American bee species ranging into southern Canada

Project description:Abstract Background Sweat bees of the genus Agapostemon Guérin-Méneville, 1844 (Hymenoptera: Halictidae) are common and widespread in the Americas. Despite distinct morphological characters that were recognised in earlier taxonomic treatments, Agapostemonfasciatus Crawford, 1901 has been considered a variety of A.melliventris Cresson, 1874 since the 1930s and later placed into synonymy under A.melliventris in the early 1970s. New information A more detailed study of morphology (including examination of type materials), distribution and genetic data (i.e. DNA barcodes) of these two taxa suggests they are not conspecific. As such, A.fasciatus is resurrected as a valid North American bee species. Agapostemonfasciatus ranges further north in North America than A.mellivenrtis, reaching the southern Prairies Ecozone of Canada (Alberta, Saskatchewan), while most records of A.melliventris are from the south-western United States and northern Mexico. More accurate distributions for both species can be modelled as specimens in collections are identified using the diagnostic features provided. However, additional work is required on the A.melliventris species complex in the southern United States as genetic data suggest that multiple taxa could be present.

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Identification of 24 new microsatellite loci in the sweat bee Lasioglossum malachurum (Hymenoptera: Halictidae).

Project description:The objective here is to identify highly polymorphic microsatellite loci for the Palaearctic sweat bee Lasioglossum malachurum. Sweat bees (Hymenoptera: Halictidae) are widespread pollinators that exhibit an unusually large range of social behaviours from non-social, where each female nests alone, to eusocial, where a single queen reproduces while the other members of the colony help to rear her offspring. They thus represent excellent models for understanding social evolution.24 new microsatellite loci were successfully optimized. When amplified across 23-40 unrelated females, the number of alleles per locus ranged from 3 to 17 and the observed heterozygosities 0.45 to 0.95. Only one locus showed evidence of significant deviation from Hardy-Weinberg equilibrium. No evidence of linkage disequilibrium was found. These 24 loci will enable researchers to gain greater understanding of colony relationships within this species, an important model for the study of eusociality. Furthermore, 22 of the same loci were also successfully amplified in L. calceatum, suggesting that these loci may be useful for investigating the ecology and evolution of sweat bees in general.

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Seladonia (Pachyceble) henanensis sp. n. (Hymenoptera, Halictidae) from China.

Project description:Seladonia (Pachyceble) henanensis sp. n., is described from Henan Province, the eastern-central part of China. This species is separated from its allied species by a combination of the following morphological characters: head broad in female, inner hind tibial spur of female with 7-8 slender teeth, T1 basolaterally with appressed hair tuft in both sexes, and genitalia with long and large lower gonostylus in male. Important taxonomic characters are illustrated with photographs, scanning electron micrographs, and line drawings.

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First artificial hybrid of the eel species Anguilla australis and Anguilla anguilla.

Project description:BACKGROUND: Studies on artificial hybridization of different Anguilla species were conducted recently, i.e. female A. australis with male A. dieffenbachii, and female A. japonica with male A. anguilla. The existence of these artificial hybrids was however not demonstrated by independent genetic methods. Two species - A. anguilla and A. australis - that are phylogenetically close but have different sexual maturation times (12-25 weeks and 6-8 weeks, respectively), were expected to produce favourable hybrids for reproduction studies. RESULTS: A modification of the protocol for the reproduction of Anguilla japonica was used to produce eight-day Anguilla australis larvae, with a success rate of 71.4%. Thus ten out of 14 females produced eggs that could be fertilized, and three batches resulted in mass hatching. Hybrid larvae from female A. australis x male A. Anguilla survived for up to seven days post fertilization (dpf). The early development of the hybrid showed typical characteristics of A. anguilla tail pigmentation at 50 hours post fertilization (hpf), indicating expression of genes derived from the father. CONCLUSIONS: In this paper we describe the first production of hybrid larvae from male A. anguilla and female A. australis and their survival for up to 7 dpf. A species-specific nucleotide difference in the 18 S rDNA gene confirmed that genes from both A. australis and A. anguilla were present in the hybrids. The developmental stages of the hybrid eel embryos and larvae are described using high resolution images. Video footage also indicated a heart beat in 5-dpf larva.

| S-EPMC3063818 | biostudies-literature

New records of bees of the genus Sphecodes Latreille in the Palaearctic part of China (Hymenoptera, Halictidae).

Project description:The available information about the cleptoparastic bees of the genus Sphecodes in the Palaearctic part of China is summarized. Twenty-four species are currently known from this area including 16 newly recorded. Based on type specimens, new synonymies have been proposed for Sphecodescristatus Hagens, 1882 = S.alfkeni Meyer, 1922, syn. n.; S.longulus Hagens, 1882 = S.subfasciatus Blüthgen, 1934, syn. n.; S.nippon Meyer, 1922 = S.kansuensis Blüthgen, 1934, syn. n.; Sphecodespieli Cockerell, 1931 = S.orientalis Astafurova & Proshchalykin, 2014, syn. n. Lectotypes are designated for Sphecodesalfkeni Meyer, 1922 and S.pellucidusniveipennis Meyer, 1925. Illustrated keys to males and females of all species known from Palaearctic China and an updated checklist of the 33 Chinese species of Sphecodes are provided.

| S-EPMC6207634 | biostudies-literature

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