Marine benthic diatoms of Guam: new records, Dictyoneis apapae sp. nov., and updates to the checklist Author Lobban, Christopher S. Division of Natural Sciences, University of Guam, Mangilao, GU 96923, USA clobban @ triton. uog. edu clobban@triton.uog.edu Author Witkowski, Andrzej University of Szczecin, Institute of Marine and Environmental Sciences Mickiewicza 16 a, PL 70 - 383 Szczecin, Poland text Micronesica 2023 2024-06-06 2023 2 1 75 journal article 299061 10.5281/zenodo.12118784 2b921c3c-8618-439e-96da-1de9c66a90f9 0026-279X 12118784 Auricula densistriata Osada Figs 8, 9 Lobban et al. (2012) reported A. complexa (Gregory) Cleve from Guam , but J.S. Park et al. (2018) noted that the valve size and stria density of the voucher specimens match Auricula densistriata K. Osada ( Osada 1997 ) . Stria density for A. complexa is 15–20 in 10 µm ( Peragallo & Peragallo 1897 – 1908), but Lobban et al. reported 26–28 in 10 µm. In SEM ( Figs 8, 9 ) we measured 27 striae. Auricula complexa species was correctly reported from Federated States of Micronesia — Yap by Navarro & Lobban (2009) and Chuuk by Park et al. (2022) —and may well be present in Guam but we have no evidence of it, so for now remove it from the flora.