Bernice Puahi Bishop Museum · CC BY-NC · GBIF · full resolution
Acrosiphonia arcta
Green Tarantula Weed
As recorded: Spongomorpha arcta (Dillwyn) Kütz.
Plantae › Chlorophyta › Ulvophyceae › Ulotrichales › Ulotrichaceae
- Collected by
- Verrill, A.E.
- Collector number
- 60
- Locality
- Eastport
- Region
- Maine, United States
- Identified by
- Hare, J.C.
- Record type
- Preserved specimen
Acrosiphonia arcta observed alive
Since 2000, iNaturalist observers have recorded 64 research-grade sightings in the wild, most recently on 2026-08-30.
2026-08-30
Eurajoki, Suomi
(c) Kerttu Ylikotila, some rights reserved (CC BY-NC)
2026-05-18
Saint George Parish, NB, Canada
(c) Aidan Hicks, some rights reserved (CC BY-NC)
2026-04-18
Vancouver, BC, Canada
(c) malleable_rock, some rights reserved (CC BY-NC)
2026-04-18
Vancouver, BC, Canada
(c) malleable_rock, some rights reserved (CC BY-NC)
2026-04-12
North Pacific Ocean, CA, US
(c) all18, some rights reserved (CC BY-NC)
2026-04-04
North Pacific Ocean, Westhaven, CA, US
(c) caileighg, some rights reserved (CC BY-NC)
Observations and photos from iNaturalist, shown only when openly licensed.
Cite this specimen
Acrosiphonia arcta. BISH 544373. Bernice Pauahi Bishop Museum, Honolulu. GBIF occurrence 5956212830. Accessed via explore.bishopmuseum.org/specimens/bish/544373.
Record sources
- GBIF occurrence 5956212830 ↗
- Data license: CC_BY_NC_4_0
- Last harvested October 26, 2026