Turbellarian taxonomic database
Riedl RJ 1959 (citation)- p 199 diagnosis "Catenulida (sensu Marcus 1944, p 6) with a preoral, compact,
egg shaped brain, with paired, clearly delineated anterior, ventral and posterior lobes. Excretory
organs lacking. Gonads joined into a common gland, with a large preoral sperm pit, which opens
dorso-rostrally and is elongated caudal under the brain." Tyrrheniella sigillata only species, type.
[Bush also notes]:
Gut- primitive for Catenulida- more like Rhynchoscolex or Acoela, etc. and preoral gut sac.
Pharynx- large, glandular, ? from pharynx simplex to pharynx variables (not plicatus).
Brain- p 193-4 large in, sense organs as in Catenulids, paired pigmented eyes, cup organ.
Cup organ lying next to ventral lobes, sensory plates (2-4) secretory? and statocyst.
sense organ like some of Catenulida- brain makes it near Stenostomidae.
Zwitherdrize- combined gland for both eggs and sperm [male female hermaphroditic keinlay?]- eggs
in narrow dorsal parts, sperm in ventral part- this is very primitive for Catenulida.
Sulcus terminalis- what is it? excretory, ciliated pit, seminal vesicle? refers to
Marcus 1945. decides it functions as sperm duct, false seminal vesicle and seminal
vesicle?? - a preoral sperm pit.
Young JO 1978 (citation)- notes Tyrrheniella sigillata is marine, p 189.