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・ Haplogroup Q-M25
・ Haplogroup Q-M3
・ Haplogroup Q-M323
・ Haplogroup Q-M346
・ Haplogroup Q-NWT01
・ Haplogroup Q-P89.1
・ Haplogroup Q-Z780
・ Haplogroup R
・ Haplogroup R (mtDNA)
・ Haplogroup R (Y-DNA)
・ Haplogroup R-L295
・ Haplocyonopsis
・ Haplodesmidae
・ Haplodina
・ Haplodiploidy
Haplodrili
・ Haploeax
・ Haploeax bimaculatus
・ Haploeax bituberosa
・ Haploeax burgeoni
・ Haploeax cinerea
・ Haploeax latefasciata
・ Haploeax rohdei
・ Haploeax triangularis
・ Haploesthes
・ Haploesthes fruticosa
・ Haploesthes greggii
・ Haploesthes robusta
・ Haploferonia
・ Haplogaster


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Haplodrili : ウィキペディア英語版
Haplodrili

Haplodrili, or Archiannelida, is an order of primitive polychaete worms. Zoologist Ray Lankester gave it the name haplodrili, while zoologist Berthold Hatschek later named it Archiannelida. Once considered to be a class under Annelida, and even a separate phylum, haplodrili is now widely accepted to be an order under Polychaeta. Species in this order are known for completely lacking external segments.
==Overview==
Polygordius and Protodrilus live in sand, but while the former moves by means of the contraction of its body-wall muscles, Protodrilus can progress by the action of the bands of cilia surrounding its segments, and of the longitudinal ciliated ventral groove. Saccocirrus, which also lives in sand, and more closely resembles the Polychaeta, has throughout the greater length of its body on each segment a pair of small uniramous parapodia bearing a bunch of simple setae. No other member of the group is known to have any trace of setae or parapodia at any stage of development.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Haplodrili」の詳細全文を読む



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