. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. Earthworms of the Canary Islands 341. Fig. 1: The islands of Tenerife, La Gomera, Gran Canaria, Lanzarote, and Fuerteventura show- ing sites mentioned in table L Results Dichogaster affinis (Michaelsen, 1890) Benhamia affinis Michaelsen, 1890 Dichogaster affinis: Michaelsen, 1900 Description (Fig. 2): Length 16 — 31 mm, mean mm. Segment number 72—124, mean 96. Two female pores between setae "ab" in segment 14; in most cases they are surrounded by an e
. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. Earthworms of the Canary Islands 341. Fig. 1: The islands of Tenerife, La Gomera, Gran Canaria, Lanzarote, and Fuerteventura show- ing sites mentioned in table L Results Dichogaster affinis (Michaelsen, 1890) Benhamia affinis Michaelsen, 1890 Dichogaster affinis: Michaelsen, 1900 Description (Fig. 2): Length 16 — 31 mm, mean mm. Segment number 72—124, mean 96. Two female pores between setae "ab" in segment 14; in most cases they are surrounded by an elliptic papilla. Genital markings occasionally lacking and where present are ventromedian in intersegmental furrows 7/8/9/10, 7/8/9/10/11, or seldom in 7/8/9, 8/9/10/11. Clitellum annular located over segments 13—20 (62 % of specimens studied), 13 — 7421, 21 (31 % of specimens), and 12—20 (the remaining 7 o/o of specimens). Two gizzards in segments 6 and 7 respectively; the posterior one extends over segment 8 whereas the anterior presents an edge-shaped muscle fold projecting forward. Spermathecae, two pairs in segments 8 and 9, with a fine pen-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Zoologisches Forschungsinstitut und Museum Alexander Koenig. Bonn : Das Forschungsinstitut
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