Rhyssoplax aerea

Description 3

Medium sized, 26.5 to 39mm long, 17.5 to 22mm wide. Plates vary from dark green to bright red, with streaks up the sides and they commonly have a dark wedge near the crest. The skirt/girdle protected by overlapping elliptical scales uniform colour but the odd pale area. The front plate densely covered with 13 to 19 smooth to slightly beaded radial ridges, often interspersed with short ridges that don't go all the way. . Shell sculpture of radial ribs on the head and tail valves, and over the lateral areas of the median valves; longitudinal grooves over the central area, but usually obsolete at the jugum, or crest of the shell. The rear plate with maybe 15 to 20 ridges and the other plates 3 to 5 radial ridges and about 14 short front to back grooves.

Distribution 3

Found in the low intertidal zone and below low tide under boulders and stones. North Island.

Synonyms 3

Chiton aereus (Reeve, 1847) (original combination)
Chiton clavatus (Suter, 1907)
Chiton huttoni (Suter, 1906)
Chiton siculoides (E. A. Smith, 1891)
Chiton suteri (Iredale, 1910)
Gymnoplax alphonsinae (Rochebrune, 1884)
Rhyssoplax oliveri (Mestayer, 1921)

http://www.marinespecies.org/aphia.php?p=taxdetails&id=724145

References 3

New Zealand Mollusca, Marine Land and Freshwater Shells, A W B Powell, 1979

Sources and Credits

  1. (c) Peter Poortman, www.nzshells.net.nz, some rights reserved (CC BY-NC), uploaded by Tony Wills, http://www.nzshells.net.nz/Images/027O.jpg
  2. Henry Suter, 1913, no known copyright restrictions (public domain), uploaded by Tony Wills, http://www.biodiversitylibrary.org/ia/manualofnewzeala00suter#page/25/mode/1up
  3. (c) Tony Wills, some rights reserved (CC BY-SA)

More Info

iNaturalist NZ Map

Places North Island