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1.
Australian species of Sinella (Sinella) Brook (Collembola: Entomobryidae)   总被引:1,自引:0,他引:1  
Abstract  The Australian subgenus Sinella ( Sinella ) Brook is revised. Two species are recognised. A new species from New South Wales and South Australia, Sinella ( Sinella ) samueli , is described and the widely distributed species Sinella ( Sinella ) termitum Schött is redescribed based on examination of a specimen from the type series and fresh collections from a wide range of localities in south-eastern Australia. New patterns of chaetotaxy for the genus are described from these species.  相似文献
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Abstract   The adult male of Dixella humeralis is redescribed and adult female and immature life stages are described for the first time. Originally described from the Blue Mountains, New South Wales, the current range is extended to include the pasture lands of the Dorrigo Plateau. Larval and pupal chaetotaxy are illustrated and their putative homology with the Culicidae is discussed. Adult and larval characters are presented that separate the known endemic Australian Dixella species.  相似文献
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The three larval instars of Hydaticus (Guignotites) tuyuensis Trémouilles are described and illustrated for the first time, emphasizing the morphometry and chaetotaxy. Second- and third-instar larvae of the known species of the subgenus Guignotites Brinck are characterized by a trilobate median process of prementum. All larval instars of H. tuyuensis, however, have a bilobate process, similar to that present in the known species of the subgenus Hydaticus Leach. This implies that a trilobate process cannot be used as a diagnostic character for Guignotites. Alternatively, Guignotites as presently defined may not represent a natural group. A cladistic analysis of 57 larval characters suggests that the genus Hydaticus shares a common origin with the clade composed of the genera Eretes Laporte and Thermonectus Dejean, based on the following synapomorphies: (i) abdominal segment VII almost completely sclerotized ventrally; the absence of (ii) additional ventroapical pores on the third antennomere, (iii) setae FE4 and FE6, (iv) additional setae on the femur and (v) additional setae on the tibia; and the presence of (vi) setae on the median process of prementum and (vii) spinulae on the second labial palpomere. A bilobate or trilobate median process of the prementum and the submedial insertion of seta AN3 distinguish Hydaticus from the remaining genera of Dytiscinae studied.  相似文献
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Abstract  The third instars of the Australian species Hyphydrus lyratus Swartz, H. contiguus Wehncke, H. elegans (Montrouzier) and H. decemmaculatus Wehncke (Coleoptera: Adephaga: Dytiscidae) are described, including a chaetotaxic analysis of the cephalic capsule, head appendages, legs, last abdominal segment and urogomphi. Larvae of these species morphologically resemble other species of Hyphydrus Illiger for which the larvae have been described. A key to identify larvae of the Australian species of Hyphydrus is provided. Larvae of H. effeminatus Watts appear identical to those of H. decemmaculatus . A 822 bp fragment of the CO1 gene of larvae and adults of these species showed very slight differences, suggesting the possibility that, in Australia at least, H. decemmaculatus is polymorphic.  相似文献
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The disposition of cercarial papillae of 68 pre-identified Schistosoma species was established. All the cercariae originated from Africa and Madagascar and were either obtained from natural or experimental infections, and belonged to three species Schistosoma haematobium, S. bovis and S. curassoni. Discriminant analysis was based on nine characters: average values, skewness and kurtosis of three cercarial indices (AD, AL and U) for each sample or isolate. AD, AL correspond respectively to the relative distance between dorsal and lateral papillae. U corresponds to the total number of tail stem papillae. With the exception of two cases of the 68 (one of them corresponding to cercariae shed by a non-African experimentally infected snail), the method enabled discrimination of S. haematobium, S. bovis and S. curassoni.  相似文献
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Larval morphology can provide valuable characters for taxonomic and phylogenetic analyses of insects and reflect the adaptations to various living habits. Compared with the adult stages, larval study has lagged far behind in Mecoptera. Although several genera of Panorpidae have been studied for their larval stages, the larva of Dicerapanorpa Zhong and Hua, 2013 basically remains unclear. Here the larva of Dicerapanorpa magna (Chou) is described and illustrated in detail for the first time using light microscopy and scanning electron microscopy. The larva is eruciform, with eight pairs of abdominal prolegs in addition to three pairs of thoracic legs, as in other Panorpidae. The most remarkable characteristics of the larvae include a pair of erect subdorsal annulated processes each on abdominal segments I–IX (A1–A9) and a single middorsal annulated process on A10, as well as a pair of prominent compound eyes composed of over 40 ommatidia, which distinguish this genus from other genera of Panorpidae. The annulated processes may have adaptive significance for fossorial and soil-living habits.  相似文献
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记述刺齿虫兆属温州 1 新种:六毛刺齿虫兆Homidia hexaseta sp. nov.,该种的鉴别特征包括体色,下唇具光滑毛L1,头背部顶区具6根大刚毛,胸部第Ⅱ节具p4系列大刚毛,腹部第Ⅲ节中间具a2大刚毛,腹部第Ⅳ节具B6和Ae5-7大刚毛以及端节亚顶端齿远大于顶端齿。同时,本文还给出了浙江省刺齿虫兆属分种检索表。正模:♀,浙江省温州市泰顺县乌岩岭国家自然保护区,采集号C9271-4,2005-Ⅶ-29;副模:5♀♀。其中两头雌性副模标本保存于台州学院生命科学学院,其余标本保存于南京大学生命科学学院。  相似文献
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描述尖瘤属Acrocyrtus印度1新种,陈氏尖瘤A.cheni sp.nov.。  相似文献
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