Bernice Puahi Bishop Museum · CC BY-NC · GBIF · full resolution
Petrospongium rugosum
As recorded: Petrospongium rugosum (Okamura) Setch. & N.L.Gardner
Chromista › Ochrophyta › Phaeophyceae › Ectocarpales › Petrospongiaceae
- Collected by
- (Not on sheet)
- Collector number
- 5544
- Date
- July 1, 1945
- Locality
- Monterey County
- Region
- California, United States
- Record type
- Preserved specimen
Petrospongium rugosum observed alive
This specimen was collected in 1945. Since 2000, iNaturalist observers have recorded 180 research-grade sightings in the wild, most recently on 2026-09-28.

2026-09-28
Newport Beach, CA, USA
(c) Gavin Skeen, some rights reserved (CC BY)

2026-09-28
Newport Beach
(c) emilyk518, some rights reserved (CC BY-NC)

2026-09-28
Santa Cruz County, CA, USA
(c) James Maughn, some rights reserved (CC BY-NC)

2026-09-27
Santa Cruz, CA, USA
(c) Leyton Reid, some rights reserved (CC BY-NC)

2026-09-26
Seacliff Dr, Pismo Beach, CA, US
(c) Jordan Collins, some rights reserved (CC BY-NC)

2026-09-13
Pacific Grove, CA, US
(c) myui, some rights reserved (CC BY-NC)
Observations and photos from iNaturalist, shown only when openly licensed.
Cite this specimen
Petrospongium rugosum. BISH 559275. Bernice Pauahi Bishop Museum, Honolulu. GBIF occurrence 5956302794. Accessed via explore.bishopmuseum.org/specimens/bish/559275.
Record sources
- GBIF occurrence 5956302794 ↗
- Data license: CC_BY_NC_4_0
- Last harvested October 26, 2026
