查看更多>>摘要：An analysis of the primary setae and pores of first instars of 13 species of Dytiscinae was performed to deduce the ancestral system of primary setae and pores of the head capsule, head appendages, legs, last abdominal segment and urogomphus. One hundred and thirty-one setae, 69 pores and three setal groups have been assigned to the ground-plan pattern of the dytiscine larva, 27 setae and 20 pores on the head capsule; 30 setae, 25 pores and three setal groups on the cephalic appendages; 51 setae and18 pores on the legs; 15 setae and three pores on the last abdominal segment; and eight setae and three pores on the urogomphus. A hypothesis of the phylogeny of the tribes of Dytiscinae is presented on a cladistic analysis of first instar chaetotaxy characters conducted using the program TNT. All tribes of Dytiscinae were included with larger tribes represented by multiple genera. Our concept of the subfamily Dytiscinae as defined on the basis of first instar chaetotaxy was found separated into three distinct clades: (1) Cybistrini, (2) Dytiscini + Hyderodini, and (3) Aubehydrini + Hydaticini + Eretini + Aciliini. The proposed relationships of the tribes of Dytiscinae are ((Cybistrini + (Hyderodini + Dytiscini)) + (Aubehydrini + (Hydaticini + (Eretini+ Aciliini)))). Characters useful for phylogenetic analysis of the subfamily are described and illustrated.
查看更多>>摘要：Six species, including four new species, are recognised from Australia in Bactrothrips, and Lqsiothrips Moulton is syn-onymised with this genus. This group of spore-feeding thrips is widespread on dead leaves across the Old World tropics from Africa to Japan. The Australian species are mainly associated with dry fruiting capsules of Eucalyptus trees. Males usually have lateral tubercles on the abdomen, but no fore tarsal teeth, and the significance of this in sexual behaviour is noted.
查看更多>>摘要：In the Introduction to the present International Code of Zoological Nomenclature (International Commission on Zoological Nomenclature, 1999) (herein referred to as the Code), there is a remark that few zoologists today or in the future can have any knowledge of the Latin language although there is adherence to Latin grammar in the Code. The present Code, nevertheless, retains the requirement that Latin or latinized adjectival speciestgroup names must always agree in gender with the generic name withwhich they are combined. Furthermore, Article 30 of the Code states that a genus-group name takes the gender given for that word in standard Latin dictionaries. Moreover, Article 39.1.2.a. states that a genus-group name that is, or ends in, a Greek wordtransliterated into Latin without change takes the gender given for that word in standard Greek dictionaries. However, such dictionaries may not be readily available to some people. The third edition of the Code, published in 1985, contained an appendixwith recommendations on the formation of names that proved useful, but this section was omitted from the ptesent edition of the Code.
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