On Kincaidiana Altman, 1936 and Guestphalinus Michaelsen, 1933 (Annelida, Clitellata, Lumbriculidae), with the descriptions of three new species Author Fend, Steven V. E0C611FA-9619-4DFD-9701-026417181232 US Geological Survey, 345 Middlefield Rd., Menlo Park, CA, 94025, USA. & urn: lsid: zoobank. org: author: E 0 C 611 FA- 9619 - 4 DFD- 9701 - 026417181232 & Corresponding author: svfend @ usgs. gov svfend@usgs.gov Author Rodriguez, Pilar C4600D2B-17E2-4CD0-AE75-B79BA9DD35D6 University of the Basque Country, UPV / EHU, Sarriena s / n, Leioa 48940, Spain. & Email: pilar. rodriguez @ ehu. eus & urn: lsid: zoobank. org: author: C 4600 D 2 B- 17 E 2 - 4 CD 0 - AE 75 - B 79 BA 9 DD 35 D 6 pilar.rodriguez@ehu.eus Author Achurra, Ainara 105572EB-B070-4BE4-93D2-50FA50847C9E University of the Basque Country, UPV / EHU, Sarriena s / n, Leioa 48940, Spain. & Email: ainara. achurra @ ehu. eus & urn: lsid: zoobank. org: author: 105572 EB-B 070 - 4 BE 4 - 93 D 2 - 50 FA 50847 C 9 E ainara.achurra@ehu.eus Author Erséus, Christer D98F606A-B273-4F50-95F5-C35F17B12C85 University of Gothenburg, SE- 405 30 Göteborg, Sweden. & Email: christer. erseus @ bioenv. gu. se & urn: lsid: zoobank. org: author: D 98 F 606 A-B 273 - 4 F 50 - 95 F 5 - C 35 F 17 B 12 C 85 christer.erseus@bioenv.gu.se text European Journal of Taxonomy 2017 2017-10-24 361 1 46 journal article 21986 10.5852/ejt.2017.361 db3fd15a-2d90-4f3f-87f8-10b8953e26a5 2118-9773 3836508 F61CB5C7-B22E-4FAB-997A-BF99C7828C77 Kincaidiana Altman, 1936 Type species Kincaidiana hexatheca Altman, 1936 . Included species Kincaidiana hexatheca Altman, 1936 Kincaidiana smithi Fend & Rodriguez sp. nov. Remarks The diagnosis in Fend (2009) is modified to include the new species with a single, median male pore and atrium, and spermathecal pores in line with ventral chaetae. New observations of several populations of K. hexatheca (see below) indicate that chaetae in anterior segments may appear as simple bifids (as in previous descriptions), but typically have more complex structure: a broad proximal tooth, a smaller dorsal tooth, and a thin dorsal keel. Anterior chaetae are rarely simple-pointed. Altman (1936) described K. hexatheca and discussed the relationship of Kincaidiana to another proboscisbearing (Holarctic) genus, Rhynchelmis Hoffmeister, 1843 , but made no mention of the European Guestphalinus wiardi ( Michaelsen, 1933 ) . Rhynchelmis differs from Kincaidiana , Guestphalinus and Uktena in having spermathecae only in segments anterior to the atria, and the (usually) semiprosoporous atria are (almost always) located in segment X. Kincaidiana freidris Cook, 1966 (later transferred to Altmanella Fend, 2009 ) has prosoporous atria in VIII; however, it differs from K. hexatheca in most other respects: it is a small worm, without a proboscis, and spermathecae are present only in the postatrial (not in the atrial) segment. The hexathecate condition, with three spermathecal segments beginning with the atrial segment, is only known in Kincaidiana and in Cookidrilus Rodriguez & Giani, 1987 . In the latter genus, there is no proboscis, the atria and spermathecae begin in X, instead of IX, and the male ducts are paired and semiprosoporous.