Caldisphaera lagunensis

Caldisphaera lagunensis is an archaeal species described in 2003 from an acidic hot spring on Mount Maquiling in the Philippines. The original study examined organisms that used organic nutrients and grew without oxygen. Its findings concern isolated strains rather than a survey of the species' worldwide distribution. [1]

The study reported non-motile, spherical cells approximately 0.8–1.1 μm wide. Tested growth occurred at 45–80°C and pH 2.3–5.4, with optima of 70–75°C and pH 3.5–4.0. These are laboratory growth measurements, not estimates of all natural habitats. [1]

RIKEN's JCM catalogue identifies JCM 11604 as the type strain, also designated IC-154, DSM 15908, MCC-UPLB 1331 and ANMR 0165. The culture entered the collection in 2002. Its recorded origin is the acidic spring on Mount Maquiling. These identifiers help distinguish the reference culture from other material assigned to the species. [2]

NCBI lists a complete genome for DSM 15908 under GenBank accession CP003378.1. BioProject PRJNA70815 connects this sequencing work to the GEBA programme and lists assembly GCA_000317795.1. Genome records and culture identifiers provide traceable research resources; they do not establish every ecological property of the species. [3][4]

[1] https://pubmed.ncbi.nlm.nih.gov/12892143/

[2] https://www.jcm.riken.jp/cgi-bin/jcm/jcm_number?JCM=11604

[3] https://www.ncbi.nlm.nih.gov/nuccore/CP003378

[4] https://www.ncbi.nlm.nih.gov/bioproject/PRJNA70815

This article independently summarizes the original description and public culture and genome records. It does not reproduce the paper or infer a worldwide distribution.