簡介:"Thacra piperasia體呈紡棰形,雌性體長約123μm, 雄性未發現,硬皮板在末端凹陷,硬皮板網紋中線由基部至中間,臨中線完整,亞中線缺乏,背毛瘤靠近硬皮板後沿,背毛向後,足部節正常,足毛正常,基部區域光滑,前胸板缺乏,羽爪為單形,具六裂,後體部背板有三脊起,中脊與二側脊漸次癒合於末端,側毛缺乏,性蓋具有約12條縱脊,棲息於菲律賓風藤(Piper philippinum)葉背上,無明顯為害症狀,分佈於臺灣綠島及泰國。Thacra piperasia body spindle shaped, female 123μm long, male not seen, shield lobe concave at apex, design with median line from base to middle, admedian lines complete, submedian line absent, scapular tubercles set near rear shield margin, setae directed to rear, leg segments normal, coxal area smooth, fore coxal sternum missing, empodium simple, 6 rayed. Opisthosoma dorsum with median ridge not ending before lateral ridges, the lateral seta missing, coverflap with about 12 longitudinal ridges. Infesting on lower surface of Piper philippinums, no apparent damage was observed. Distribution at Taiwan (Green island) and Thailand. "