Kathrynella

Type species: Kathrynella guyanae Omodeo 1996 Alluroidids with a cylindrical muscular atrium (euprostate); male pores paired, intraclitellar, opening ventrally and equatorial in XIV. Spermathecal pores a pair, opening in intersegmental furrow 6 / 7. Modified setae a and b in VII; grooved penial setae ventral in XIV. Circulatory apparatus strongly developed, showing in the anterior segments long lateral commissures between dorsal and ventral vessels rolled into a ball. Kathrynella shares with Righiella the metandric condition of the male apparatus. The presence of sperm sacs and the absence of glandular lining of the atria may also be diagnostic (Omodeo & Coates, 2001).