Douthittia

• Main Authors: Haukisalmi, Voitto, Hardman, Lotta M., Hoberg, Eric P., Henttonen, Heikki
• Format: Other/Unknown Material
• Language: unknown
• Published: 2014
• Subjects: Biodiversity; Taxonomy; Metazoa; Platyhelminthes; Cestoda; Cyclophyllidea; Anoplocephalidae; Douthittia; Arctic
• Online Access: https://zenodo.org/record/5687004; https://doi.org/10.5281/zenodo.5687004

Douthittia n. g. (Fig. 16) Etymology. The name of the new genus refers to Herman Douthitt, a pioneer in the taxonomy of anoplocephalid cestodes of rodents. “ Douthittia ” is feminine. Diagnosis. Strobila long or of moderate length, relatively narrow. Scolex merging gradually with neck. Suckers embedded within scolex or slightly protruding, directed laterally or antero-laterally. Minimum neck width roughly half of scolex width (usually less in D. nordenskioeldi). Proglottids slightly or distinctly craspedote. Genital pores unilateral or infrequently (and irregularly) alternating. Genital ducts pass dorsal to longitudinal osmoregulatory canals. Testes mostly anterior to ovary, significantly overlapping latter and being often in contact with vitellarium. Antiporal testes overlap or extend slightly across antiporal ventral longitudinal canal, poral testes usually reaching corresponding poral canal (except in D. bairdi), but not overlapping it. Cirrus-sac rather wide, overlapping or extending across poral longitudinal canals. Vagina covered with distinct cell-layer; vagina and vaginal tube widening distally. Vagina slightly shorter than or as long as cirrus sac, position with respect to ventral longitudinal canal variable. Seminal receptacle spherical or subspherical, relatively small. Ovary median, large relative to proglottid size, usually filling whole space between ventral longitudinal canals. Vitellarium median or poral with respect to ovary. Early uterus anterior, ventral to other organs, extending laterally beyond longitudinal canals; lateral parts usually slightly widened posteriorly; reticulations relatively dense. In cricetid (Arvicolinae, Neotominae) and sciurid rodents in North America and Arctic Eurasia. Type species: D. nearctica (Haukisalmi & Henttonen, 2007) n. comb. Paranoplocephala nearctica Haukisalmi & Henttonen, 2007 Other species: D. bairdi (Schad, 1954) n. comb. Andrya bairdi Schad, 1954 Paranoplocephala bairdi Schad, 1954 Tenora, Murai & Vaucher, 1984 D. nordenskioeldi n. comb. ...