TARSAL STRUCTURE AND CLIMBING ABILITY OF COCKROACHES
TARSAL STRUCTURE AND CLIMBING ABILITY OF COCKROACHES
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DOI:
10.1002/jez.1401190307
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发表时间:
1952-01-01
影响因子:
--
通讯作者:
WILLIS, ER
中科院分区:
文献类型:
--
作者:
ROTH, LM;WILLIS, ER
The tarsi of Blattella germanica, Periplaneta americana, P. australasiae, Supella supellectilium. and Blatta orientalis are descr. and exptl. data is presented relating tarsal structure to the ability of these insects to climb various surfaces. The inability of females and some males of B. orientalis to climb a smooth vertical surface is due to the small size of the arolia, which are too short to be functional. The arolia can function on both smooth and rough surfaces and are more effective climbing organs than the euplantulae, which function best on smooth surfaces. Histological differences as well as differences in the controlling mechanism between the arolia and euplantulae may account for differences in efficiency of the 2 types of structures. Assuming that the arolia form an airtight seal with a smooth substratum, atmospheric pressure alone could account for the ability of the cockroach to walk inverted on a smooth surface at a pressure of 1 atmosphere but cannot account for their ability to walk in this position at greatly reduced pressures. It is suggested that adhesive properties of a greasy film on the arolia and euplantulae are involved in the functioning of these organs and that this substance is the same mobile grease known to cover the body of the roach.