In recent years, fossils recognized as sponges and animal embryos have been reported in the Doushantuo phosphate rocks from the Guizhou Province (Li et al. ,1998, Xiao et al. ,1998). Zhang et al. (1998) disagreed with the interpretation of Li et al. that some of the needle-formed structures were monaxial spicules of sponges. They considered that these structures could be detached broken spines of collapsed Acritachs.Observation of specimens at hand revealed that the needle-shaped structure occurred only within the globular bodies, not anywhere along the crack or in surrounding matrix (P1. I -A and B, P1. II -A and B). It is monaxial and quite strong, with two tapering ends (P1. I -C). These characters are distinctly different from the spines of Acritarch illustrated in Zhang et al. (1998, Fig. 1). Based on the shoe -shaped morphology and dense peripheral flagella, some specimens were first identified as the parenchymella larvae of sponges by Li et al. (1998, Fig. 2E). Zhang et al. held that the interpretation of Li et al. is questionable, and reinterpreted as collapsed Acritarch (Ericiasphaera sp. ). The authors recognized that the specimens illustrated in Zhang et al. (1998, Fig. 1, B and D) are not to be compared with the specimen illustrated by Li et al. (1998, Fig. 2E) in the flexible outline and the shoe-shaped morphology. Therefore, the two cannot be mentioned in the same breath. Extant specimens at our disposal are (PL I -F, PL II -C) similar to those illustrated by Li et al. (1998, Fig. 2E). Whether or not they are larvae of sponges, it is not determined as yet. According to the observation of extant specimens, we tend to the interpretation of the sponges as monaxial spicules. Therefore, this paper illustrates some specimens that are well preserved and provides a conclusive evidence for the existence of sponges in the Weng'an Biota.