| Classification | Chromista: Phaeophyceae: Costariaceae: Thalassiophyllum |
| Harvard University Herbaria Barcode(s) | 00884496 |
| Collector | W. A. Setchell with A. A. Lawson |
| Country | United States of America |
| State | Alaska |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Alaska |
| Locality | western shore of Amaknak Island, Unalaska Bay |
| Date Collected | 1899-06-** |
| Habitat | In the upper part of the sublitoral zone, forming a zone |
| Substrate | on rocks |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/d3230dc0-d4a8-4247-a46e-5a794bf6e85d |
| Harvard University Herbaria Barcode | 00884496 |
| Herbarium | FH |
| Previous ownership | [ex] Phycotheca Boreali-Americana. Collins, Holden, and Setchell. No. XXXVI. |
| Family | Costariaceae |
| Determination | Thalassiophyllum clathrus (S. G. Gmelin) Postels & Ruprecht |
| Determination Remarks | [is filed under name] [is Current name] |
| Sex | not determined |
| Phenology | NotDetermined |
| Preparation Type | Packet |
| Preparation Method | Dried |
