摘要
本文记述葵粉蚧属一新种,取名为耕葵粉蚧。新种的正模和副模标本均保存在中国科学院动物研究所。 该粉蚧发现于七十年代初,对此蚧虫的经济意义有一个初步认识过程。最早只知其寄生在高粱的根部。后来在玉蜀黍的根部,有时也在玉蜀黍近地面的叶鞘内发现寄生着密集的虫体。被寄生的植株,轻者生长发育缓慢,矮小细弱,减少产量;重者难以结实,甚至枯萎而死。该蚧虫或造成局部地区的玉蜀黍农田受害日趋明显,或在其分布区内大发生,此起彼伏,难以掌握,所以旧稿数易。根据这一害虫的发展情况应引起有关部门的关注,尽快进行对该蚧虫的观察研究工作,以便及时采取控制其猖獗的措施,确保粮食丰产。现将新种记述如下。
This paper describes a new species of the genus Trionymus. The holotype and paratype are preserved in Institute of Zoology, Academia Sinica.Trionymus agrestis Wang et Zhan? sp. nov. (fig. 1)Adult female: The type series is represented by old adult female, length of mounted specimens, on slide, attaining almost 3.8-4.2 mm, body elongate, and more or less parallel sided. Cerarii recognizable on 3-9 abdominal segments and in a few specimens 2 pairs occur in the head region. The anal lobe cerarius containing 2 moderately large, conical setae, numerous but scattered pores, and as many as 6 setae of various lengths, these all borne upon a well defined, oval area that tends to be definitely sclerotized. Penultimate cerarii with 2 somewhat smaller, conical setae, 3-5 slender setae, and a cluster of pores. Cerarius of abdominal segment 7-4 composed merely of a pair of smaller, conical setae and a cluster of pores. Cerarius of abdominal segment 3 with one smaller, conical setae and a few pores. Frontal cerarius composed merely of 3-2 small, conical setae and a small group of pores, or perhaps at times lacking. Preocular cerarii with 1-3 small, conical setae and a few pores or perhaps at times lacking. Large and small tubular ducts quite abundant over the dorsal and ventral side. Otherwise the dorsal and ventral side is beset with trilocular pores. On the ventral side, multilocular pores are present from the abdominal segments to the head, for the most part scattered but occurring in more or less distinct bands on abdominal segments 5-8. Ci-rculus present. Anterior and posterior ostioles definitely present- Legs presenting nothing distinctive. Antennae normally 8-segmented. Dorsal and ventral body setae sparse, of various lengths, but all quite small and slender. Anal ring of normal form and position, its setae about twice as long as the diameter of the ring.Type material: This species is described from 50 slide-mounted specimens, Holotype and 9 paratype females on 2 slides, Liaoning Province, Jul 17,1973, Coll. Wang Tze-ching, Host: Sorghum vtdgare Pers.; 9 paratype females on 9 slides, Shandong Province, Jul 25, 1976, Coll. Wang Tze-ching, Host: Zea mays L.This new species is evidently close to Trionymus dolus Ferris, but differs from the latter by the following characters: Tubular ducts are of 2 sizes. On the ventral side, multilocular pores are present from the abdominal segments to the head; Cerarii recognizable on 3-9 abdominal .segments and in a few specimens 2 pairs occur in the head region or perhaps at times lacking.
出处
《昆虫学报》
CAS
CSCD
北大核心
1990年第4期450-452,共3页
Acta Entomologica Sinica
