Chthamalus

publication ID	https://doi.org/ 10.11646/zootaxa.4000.5.4
publication LSID	lsid:zoobank.org:pub:F13F1205-EBDB-41D0-83B7-228D9C710357
DOI	https://doi.org/10.5281/zenodo.5671805
persistent identifier	https://treatment.plazi.org/id/3D156A32-FFED-0A1C-FF2B-FA672393F909
treatment provided by	Plazi
scientific name	Chthamalus
status

Key for the identification of Chthamalus View in CoL View at ENA species of the ‘ challengeri subgroup’ of the Northwest Pacific

1. Junction of the scutum and tergum sigmoid shaped........................................................... 3

- Junction of the scutum and tergum straight.................................................................. 5

2. Cirri III antenniform......................................................................... C. antennatus

- Cirri III non- antenniform............................................................................... 4

3. 4–5 depressor muscle crests on tergum.......................................................... C. challengeri

- 2–3 depressor muscle crests on tergum............................................................... C. dalli

4. Shell surface strongly ribbed....................................................................... C. moro

- Shell surface not strongly ribbed.......................................................................... 6

5. Scutum equilateral triangular............................................................ C. williamsi sp. nov.

- Scutum depressed, width greater than height........................................................ C. sinensis