Stromboidea
Original diagnosis of Torgnellus by Olsson, 1944:
- "In form. the shell is like Pugnellus Conrad but more massive and the external surface is smooth or without definite sculpture; sutures covered with callus except perhaps in extreme youth; young shells are fairly regularly fusiform with a pointed spire, a long, straight anterior canal and with an upward pointed hook at the posterior end of the outer lip; with maturity and senility, the shell becomes thick, massive and irregular, the outer lip developing a massive lobe ending posteriorly in a blunt spur; the anterior canal is broadly appressed and turns sharply towards the left; spire in the adult is merely a small knob, appressed on the ventral side; aperture in the middle is quite wide with parallel sides"
Torgnellus species are:
