Amphibalanus, Pitombo, 2004

Buckeridge, John Stewart, Chan, Benny K. K. & Lee, Shih-Wei, 2018, Accumulations of Fossils of the Whale Barnacle Coronula bifida Bronn, 1831 (Thoracica: Coronulidae) Provides Evidence of a Late Pliocene Cetacean Migration Route through the Straits of Taiwan, Zoological Studies 57 (54), pp. 1-12 : 6-9

Amphibalanus sp. cf. A. reticulatus ( Utinomi, 1967)

( Fig. 5 )

Distribution: Late Pliocene to early Pleistocene (Piacenzian - Gelasian); Taiwan- (this work).

Material Examined: Taiwan. CIMFO0059- 0062: four complete shells (without opercula). All specimens were collected by Wen-Ji Xue between 1980 and 2000 and are from an actively eroding escarpment at Chaiyi Niupu - 23°25'40.8"N, 120°33'25.7"E; Specimens are held by the Chia-Yi Municipal Museum, Chaiyi City, Taiwan.

Description: Shell high-conic with six compartments, each with a single row of longitudinal pores; orifice rhomboid, toothed; radii solid, narrow, summits sub-vertical; exterior smooth, with cross-hatched pattern of thin, reddish-brown longitudinal bands crossed by similar transverse bands on a cream background; base calcareous with single row of radiating pores ( Fig. 5 ). Opercula unknown.

Remarks: The absence of any opercula prevents a firm taxonomic placement of this material. The porous paries; the solid, narrow radii; and a base with single row of pores - and perhaps the coloration, places this within Amphibalanus . These specimens are closest to Amphibalanus reticulatus ( Utinomi 1967) , a common fouling species and which is known from the Recent of Taiwan ( Chan et al. 2009). This occurrence supports a shallow water depositional environment.

Figures

Fig. 5. (A-F) Amphibalanus? sp. collected from the Liuchungchi Formation, Niupu, Chiayi, Western Central Taiwan, (Plio-Pleistocene age). Note that the shell compartment are tubiferous and possess interlaminate figures.