Kincaidiana Altman, 1936

Fend, Steven V., Rodriguez, Pilar, Achurra, Ainara & Erséus, Christer, 2017, On Kincaidiana Altman, 1936 and Guestphalinus Michaelsen, 1933 (Annelida, Clitellata, Lumbriculidae), with the descriptions of three new species, European Journal of Taxonomy 361, pp. 1-46 : 6-7

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.