The tubercularis species group of aulacaspis (sternorrhyncha : coccoidea : diaspididae)

概要

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Eight species of the scale insect genus Aulacaspis are recognized as belonging tothe tubercularis species group: A. tubercularis, A. alisianCl, and six new species, A. Geula,A. ra ipingensis, A. alyx;ae, A. sClIrru/ae, A. scaphocalycis, and A. lagl.l17ae, the first ofthe new species occulTing in Malaysia, Singapore, and the Phi lippines, the last in Luzon,and the other four in Malaya. A. tubercularis and A. aeu/a are represented by abundantmaterial and broadl y variabl e in morphological cha racters, and the species conceptsadopted in this study are tentati ve. A. laip iflgel1sis is c losely related to A. (leu/a, anddist inguished from the latter as another species rather tentatively. The other fOLir of thenew species appear distinct so fa r as represented by the avai la ble materia l. As a corollaryof the collection data, A. /ubereularis should origina lly have been a Himalayan speciesoccurring on Lauraceae almost excl usively; it should have adapted itself to mango treessomewhere at the foot of the Himalayas, and then 10 mangroves in eastern As ia . A.alisiana, occurrin g in Taiwan and continental China, may be an allopatric counterpart ofthe Himalayan stock of A. Ilibercularis. A. acWa is also closely related to A. tubercular;s,from which it should have derived somewhere in westem Malesia. The new species otherthan A. Geufa appear to be more or less related to the latter, from which they may haveemerged directly or indirectly.