Haustrum is the original Latin word for "haustellum" indicating the presence of this character in the holotype.
haustrum is well preserved and exhibits several mouthpart characters that are rare in amphiesmenopteran fossils.
Caption: Figure 6: Holotype of Austaulius haustrum gen.
(formerly described as Pomacea haustrum
but is pending revision, Reeve, 1856) (Hayes et al.
Using the offspring of three sympatric whelks: Cominella virgata (one embryo per capsule); Cominella maculosa (multiple embryos per capsule); and Haustrum scobina (multiple embryos per capsule and nurse-embryo consumption), we examined how contrasting reproductive strategies mediate inter- and intraspecific differences in hatchling provisioning.
The third whelk species was the adelphophagic Haustrum scobina, which produces multiple embryos per capsule (SL ~1.3 mm) that feed on intracapsular, nutritive nurse embryos during the encapsulation period (see Carrasco and Phillips, 2014).
(Reeve, 1858), but may include 2 other species; detritivore; macrophyte and epiphyte feeder, noted from warmer waters, frequently on silty or muddy substrates (pelophile); scattered over the state, but mostly southern (Snake River Plain); often on soft substrates; often lakes and ponds; strongly synanthropomorphic.
Another whelk, Haustrum
haustorum, was rare on wave-exposed shores.
Site selection by a small drilling predator: why does the gastropod Haustrum
baileyanum drill over muscle tissue of the abalone Haliotis rubra?