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      Review of the ant genus Nesomyrmex Wheeler, 1910 (Hymenoptera, Formicidae, Myrmicinae) from the Arabian Peninsula

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      African Invertebrates
      Pensoft Publishers

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          Abstract

          In this study, we review the Arabian species of the ant genus Nesomyrmex Wheeler. We provide species reviews for the two previously known species, N. angulatus (Mayr, 1862) and N. humerosus (Emery, 1896) and describe a new species N. zaheri sp. n. from Yemen based on the worker caste. An illustrated key to the Arabian species of the genus and montage photos of all three species are provided.

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          A preliminary study on the insect fauna of Al-Baha Province, Saudi Arabia, with descriptions of two new species

          Abstract A preliminary study was carried out on the insect fauna of Al-Baha Province, south-western part of Saudi Arabia. A total number of 582 species and subspecies (few identified only to the genus level) belonging to 129 families and representing 17 orders were recorded. Two of these species are described as new, namely: Monomorium sarawatensis Sharaf & Aldawood, sp. n. [Formicidae, Hymenoptera] and Anthrax alruqibi El-Hawagry sp. n. [Bombyliidae, Diptera]. Another eight species are recorded for the first time in Saudi Arabia, namely: Xiphoceriana arabica (Uvarov, 1922) [Pamphagidae, Orthoptera], Pyrgomorpha conica (Olivier, 1791) [Pyrgomorphidae, Orthoptera], Catopsilia florella (Fabricius, 1775) [Pieridae, Lepidoptera], Anthrax chionanthrax (Bezzi, 1926) [Bombyliidae, Diptera], Spogostylum near tripunctatum Pallas in Wiedemann, 1818 [Bombyliidae, Diptera], Cononedys dichromatopa (Bezzi, 1925) [Bombyliidae, Diptera], Mydas sp. [Mydidae, Diptera], and Hippobosca equina Linnaeus, 1758 [Hippoboscidae, Diptera]. Al-Baha Province is divided by huge and steep Rocky Mountains into two main sectors, a lowland coastal plain at the west, known as “Tihama”, and a mountainous area with an elevation of 1500 to 2450 m above sea level at the east, known as “Al-Sarat or Al-Sarah” which form a part of Al-Sarawat Mountains range. Insect species richness in the two sectors (Tihama and Al-Sarah) was compared, and the results showed that each of the two sectors of Al-Baha Province has a unique insect community. The study generally concluded that the insect faunal composition in Al-Baha Province has an Afrotropical flavor, with the Afrotropical elements predominant, and a closer affiliation to the Afrotropical region than to the Palearctic region or the Eremic zone. Consequently, we tend to agree with those biogeographers who consider that parts of the Arabian Peninsula, including Al-Baha Province, should be included in the Afrotropical region rather than in the Palaearctic region or the Eremic zone.
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            Diagnostic survey of Malagasy Nesomyrmex species-groups and revision of hafahafa group species via morphology based cluster delimitation protocol

            Abstract Madagascar and its surrounding islands are among the world’s greatest biodiversity hotspots, harboring predominantly endemic and threatened communities meriting special attention from biodiversity scientists. Building on the considerable efforts in recent years to inventory the Malagasy ant fauna, the myrmicine genus Nesomyrmex is reviewed and (1) subdivided into four major groups based on salient morphological features corroborated by numeric morphology: angulatus -, hafahafa -, madecassus - and sikorai -groups, and (2) the hafahafa species-group endemic to Madagascar is revised. Diversity within hafahafa species-group was assessed via hypothesis-free nest-centroid-clustering combined with gap statistic to assess the number of clusters and to determine the most probable boundaries between them. This combination of methods provides a highly automatized, objective species delineation protocol based on continuous morphometric data. Delimitations of clusters recognized by these exploratory analyses were tested via confirmatory Linear Discriminant Analysis. These results suggest the existence of four morphologically distinct species, Nesomyrmex capricornis sp. n., Nesomyrmex hafahafa sp. n., Nesomyrmex medusus sp. n. and Nesomyrmex spinosus sp. n.; all are described and an identification key for their worker castes using morphometric data is provided. Two members of the newly outlined hafahafa species-group, Nesomyrmex hafahafa sp. n., Nesomyrmex medusus sp. n., are distributed along the southeastern coast Madagascar and occupy rather large ranges, but two other species, Nesomyrmex capricornis sp. n. and Nesomyrmex spinosus sp. n., are only known to occur in small and isolated forest, highlighting the importance of small forest patches for conserving arthropod diversity.
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              Descriptions provisoires de genres, sous-genres et especes de Formicides des Indes orientales

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                Author and article information

                Journal
                African Invertebrates
                AI
                Pensoft Publishers
                2305-2562
                1681-5556
                June 01 2017
                June 01 2017
                : 58
                : 2
                : 21-37
                Article
                10.3897/AfrInvertebr.58.12782
                4850141c-35e2-47ad-8a12-c85ce2d60ec0
                © 2017

                http://creativecommons.org/licenses/by/4.0/

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