Drawida Michaelsen 1900

GenusDrawidaMichaelsen, 1900 Generic diagnosis. Body size, small to giant [e. g., D. japonica (28 ~ mm); D. hattamimizu (~ 1000 mm)]. Prostomium prolobous. Clitellum is commonly in X-XIII, usually extending forward or backward [e. g., D. nemora (IX, X-XIII, XIV)], or inconspicuous. Setae four pairs, lumbricine. Dorsal pores more usually absent or intermittently present [e. g., D. companio Blakemore, 2014 (15 / 16, 19 / 20 / 21, 25 / 26 / 27)]. Male pores in or near 10 / 11. Female pores usually paired in 11 / 12, or XII, or inconspicuous. Spermathecal pores paired in 7 / 8, or inconspicuous. A pair of testis sacs typically located in IX-X. A pair of ovisacs extends backward from ovary chamber (typically in XI). Spermathecae paired in VII-VIII. Two to six gizzards within segments XI – XVIII [or especially up to nine in D. hattamimizu extending to XX or XXI; five or six in D. nilamburensis Bourne, 1894 in XXVII – XXXIV]. Oesophageal gizzards, calciferous glands, and intestinal caeca absent.

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Publication Details

Journal
Zenodo (CERN European Organization for Nuclear Research)
Published
2025-03-21
DOI
https://doi.org/10.5281/zenodo.15066006
Primary Topic
Invertebrate Taxonomy and Ecology
Type
article
Field-Weighted Citation Impact
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article

Drawida Michaelsen 1900

Zenodo (CERN European Organization for Nuclear Research)
Invertebrate Taxonomy and Ecology
article

Drawida Michaelsen 1900

article en

Abstract

GenusDrawidaMichaelsen, 1900 Generic diagnosis. Body size, small to giant [e. g., D. japonica (28 ~ mm); D. hattamimizu (~ 1000 mm)]. Prostomium prolobous. Clitellum is commonly in X-XIII, usually extending forward or backward [e. g., D. nemora (IX, X-XIII, XIV)], or inconspicuous. Setae four pairs, lumbricine. Dorsal pores more usually absent or intermittently present [e. g., D. companio Blakemore, 2014 (15 / 16, 19 / 20 / 21, 25 / 26 / 27)]. Male pores in or near 10 / 11. Female pores usually paired in 11 / 12, or XII, or inconspicuous. Spermathecal pores paired in 7 / 8, or inconspicuous. A pair of testis sacs typically located in IX-X. A pair of ovisacs extends backward from ovary chamber (typically in XI). Spermathecae paired in VII-VIII. Two to six gizzards within segments XI – XVIII [or especially up to nine in D. hattamimizu extending to XX or XXI; five or six in D. nilamburensis Bourne, 1894 in XXVII – XXXIV]. Oesophageal gizzards, calciferous glands, and intestinal caeca absent.

Zenodo (CERN European Organization for Nuclear Research)
Chinese Academy of Sciences (CN), Mindanao State University Naawan (PH), Shenyang Normal University (CN), Northeast Institute of Geography and Agroecology (CN), Langfang Normal University (CN)
Openalex Percentile: Top 68%
Invertebrate Taxonomy and Ecology
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Drawida Michaelsen 1900 · Zenodo (CERN European Organization for Nuclear Research) (2025) | TGRS Research Map | TGRS