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Table 2 Comparison of the main specific characters in the species of the genus Pruvotina Cockerell, 1903

From: Three new species of Pruvotinidae (Mollusca: Solenogastres) from Antarctica and NW Spain

Pruvotina cryophila ?P. cryophila (?) gauszi impexa longispinosa megathecata pallioglandulata peniculata praegnans providens uniperata artabra n. sp. manifesta n. sp.
Length (mm) 5 2.1 ? 12 5 5 5 4 6 8.5 4 3.2 3
Middorsal crest of sclerites +
Pedal fold extending to pallial cavity + + + + + +
Atrial papillae Simple Simple ? ? Simple or paired Grouped Paired Grouped Paired or grouped Grouped Paired or grouped Simple Simple
Medial radula denticles 4 4 ? 3 4 3–4 4 3 3–4 3–4 4–5 4 5
Radular sheath paired ? ? + + + + +
Oesophagus + ? + + + + + + ± ± +
Anterodorsal midgut caecum Unpaired Unpaired ? Unpaired Unpaired Unpaired Unpaired Paired/unpaired Unpaired Unpaired Unpaired Paired/unpaired Paired/unpaired
Sphincters on the anterior midgut ? + +
Seminal vesicles + at pd + at gp + at go
Brood chambers + + +
Genital orifice opens into a ventroanterior pouch of the pallial cavity + + + + +
Suprapallial glands + + + + + ± +
Respiratory folds 4 2–3 7 12–20 8–20 Up to 30 8–10 2–5 16–28 13 10 14 10
Abdominal spicules + + + + +
Position of the dso respect to the pallial cavity Dorsoposterior Dorsoposterior Dorsoposterior Dorsoposterior Dorsoposterior Dorsoposterior Dorsoposterior Terminal ? ? Terminal Dorsoanterior Terminal
  1. + Presence, absence, ± ambiguous, ? unknown, dso dorsoterminal sense organ, gp gonopericardioducts, go gonads, pd pericardioducts. P. impexa Pruvot, 1890 in Pruvot (1890, 1891); P. cryophila (Pelseneer, 1901) in Pelseneer (1901, 1903) and ? P. cryophila in Salvini-Plawen (1978); P. providens Thiele, 1913 in Thiele (1913) and Salvini-Plawen (1978); P. (?) gauszi Salvini-Plawen 1978, P. longispinosa Salvini-Plawen 1978, P. megathecata Salvini-Plawen 1978, P. pallioglandulata Salvini-Plawen 1978, P. peniculata Salvini-Plawen, 1978 , P. praegnans Salvini-Plawen, 1978 and P. uniperata Salvini-Plawen, 1978 in Salvini-Plawen (1978)