. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. 40 José A Talayera & Dolores I. Pérez: Occurrence of the Genus Microscolex at Western Canary Islands. Fig. 3. Microscolexphosphoreiis. External moiphology (late- ral view); General dissection of the anterior region. Microscolex phosphoreiis (Dugés, 1837) Lwnbriciis phosphoreiis Dugés, 1837 Microscolex phosphoreiis Bouché, 1972 Remarks. The body length between two and cm (av- erage ) is evidence that the Canary island specimens are smaller than those descr
. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. 40 José A Talayera & Dolores I. Pérez: Occurrence of the Genus Microscolex at Western Canary Islands. Fig. 3. Microscolexphosphoreiis. External moiphology (late- ral view); General dissection of the anterior region. Microscolex phosphoreiis (Dugés, 1837) Lwnbriciis phosphoreiis Dugés, 1837 Microscolex phosphoreiis Bouché, 1972 Remarks. The body length between two and cm (av- erage ) is evidence that the Canary island specimens are smaller than those described from continental areas. In addition, it differs from M. diibiits in its smaller size, genital papillae in segment 11, penial chaetae present in 17, and a pair of diverticulate pyriform (pear-shaped) sper- mathecae in segment 9. M. phosphoreiis is recorded for the first time from Hierro. Habitat spectrum. We consider M. phosphoreiis a species indicative of agricultural activity, whose pattern of habitats is tropical fruit crops by drip-feed irrigation and cultivated areas subject to the use of fertilizers. It was oc- casionally found in gardens with exotic plants and defor- ested sites up to 1500 m, sharing ecological niches with M. diibius. This species has a fragmentary distribution clearly related to human action; it is present on all the western Canary Islands, Gomera contributes the least num- ber of specimens whereas Tenerife the greatest number, mainly in the northern zone in banana and avocado plan- tations. It is quite scarce in the South, where it arrived accidentally in soil transported from the northern slope to improve the ground used for tropical fruit and tomatoes. In La Palma, M. phosphoreiis is noteworthy in some hor- ticultural areas near the port and a few rural towns and villages in the basal belt, where produce for export is grown by irrigation. On the other hand, this species prefers the pineapple, banana and avocado plantations at the northeaste
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