Skip to main content

Table 1 Differences between originally described characters of Helminthope psammobionta and results of this study

From: At the limits of a successful body plan – 3D microanatomy, histology and evolution of Helminthope (Mollusca: Heterobranchia: Rhodopemorpha), the most worm-like gastropod

  Salvini-Plawen, 1991[29] This study
Optic and buccal ganglia innervated by branches of ‘terminal cerebropleural connective’* opg: optic nerve parallel to N4 bg: ventral sides of cpg
Buccal ganglia located behind statocysts/pedal ganglia anterior to pedal ganglia
Pedal ganglia with pronounced anterior lobes spheroid
Visceral = abdominal ganglion with ‘chiasma of fibres’ indicating streptoneury ?without traces of streptoneury
Paired visceral nerves with anterior-running branches [29:Figure 4] not branching
Postcerebral accessory ganglia not described on N4, pedal nerve, ?opgn
Vesicle filled with spermatozoa is a ‘spermatheca’ distal to nidamental glands an ampulla proximal to nidamental glands
Gonad ‘appears ramified’; protandric, possibly gonochoric ~ tubular; hermaphroditic (possibly protandric)
Externally visible tube below CNS is anteriormost part of genital system (genital opening ‘still appears to be absent’) single tubular salivary gland
Ciliated opening at right body side is ‘(reduced) mantle cavity’ (= anus and protonephridiopore) is genital opening
Intestine located approx. 100 μm behind visceral ganglion in posterior fifth of body
Ventroterminal adhesive gland not detected/ missing present
  1. Abbreviations as in Figure 1. (*: should be pleuropedal connective?).