Table 4 in First records and two new species of sipunculans (Sipuncula) from the Southern Mexican Pacific

Table 4. Comparison between the species of Apionsoma Sluiter, 1902.
Phascolosoma hesperaApionsoma (A.) misakianumApionsoma (A.) hespera comb. nov.ReferenceChamberlin (1920)Ikeda (1904)this paperLocalityLaguna Beach, California, USAMisaki, JapanPanteón Beach, Oaxaca, MexicoNumber of rings of hooks30–506040Basal spinelets74–57–8Proportion between distance of dorsal to ventral muscle with respect to the trunk10%21%10%Nephridia extent100% of trunk<50% of trunk80% of trunkLongitude of basal spineletslonger than principal toothshorter than principal toothlonger than principal tooth