Usually has 5 rays,
plates are not conspicuous at least from the aboral
side, Diameter of disk
is less than 1/3 the total diameter but is more than 1/5 the total
Has no pedicellariae.
surface is gritty but has no large spines. The recent
et al., 2010 of this newly named species to separate it from
species follows: "Small in size; rays
stout and short [R (Ray
length) /r (inter-ray
radius) less than 5], aboral
well-spaced, bearing up to 50 short spines with fenestrated,
crystalline, smooth-sided shafts tipped by up to 10 heavy sharp points
that do not noticeably splay. Aboral
color in life usually a mottled pattern of ochre, brown, gray,
or yellow; oral color yellow to cream." The madreporite
of the type specimen is creamy yellow (photo).
Gonopores orally-directed, eggs non-buoyant, development benthic and
cream or yellow (photo) Ray
length ranges at least from 4.1 to 29.4 mm.
pumila Eernisse et al.,
Common name(s): Dwarf mottled henricia; mottled henricia
Cribrella laeviuscula var. crassa?, Henricia leviuscula variety F
pumila from Sares
Head, ray length 18 mm; diameter of central disk 5 mm.
|(Photo by: Dave
Cowles, August 2010 )
The specific epithet pumila means
dwarf. This species probably
corresponds to at least some of the individuals described by Fisher
as H. leviuscula
How to Distinguish
from Similar Species:
Most other Henricia
have a mottled aboral
side, broadcast spawn their eggs rather than brood them, have longer rays
and a ratio between ray
(R) length to inter-ray
disk radius (r) of more than 5.
Range: The type specimen
is from San Juan Island, WA. This is the only small,
in the Puget Sound area. Full range probably from Sitka,
upwelling areas in Baja California, but does not appear to inhabit
California south of Point Conception.
History: This species
broods its eggs and embryos under the central
disk until they crawl away as juveniles. Brooding
seems to occur
January to April.
This species does not appear in any key in 2010 since it was
just described this year. It appears as Henricia
sp. in Kozloff
Lamb and Hanby (2005) list it as Henricia
sp. nov. on p. 330
Douglas J., Megumi F. Strathmann, and Richard R. Strathmann, 2010. Henricia
pumila sp. nov.: A brooding seastar (Asteroidea) from the
northeastern Pacific. Zootaxa 2329: pp. 23-26
Fisher, W.K. (1911) Asteroidea of the North Pacific and
Part I. Phanerozonia and Spinulosa. Bulletin of the U. S. National
General Notes and
abundances, unusual behaviors:
We freqnently encounter this species in the intertidal
This closeup of the aboral
surface of a ray
pattern of pseudopaxillae.
is to the left.
Compare the pattern of these ossicles
with that seen in Henricia
This oral view of the ray
shows the lighter color on the oral
side. Note that the marginal
plates are longer than other ossicles
but still not markedly enlarged.
is creamy colored as in the type specimen. Notice the papulae
extended among the pseudopaxillae.
This individual with a 5.5 cm total arm spread, was
2011. Found intertidally on Sares Head.
Another mottled color pattern. Diameter is 4.5
cm. Photo by Dave
Cowles, August 2020
Authors and Editors of Page:
Dave Cowles (2010): Created original page
CSS coding for page developed by Jonathan Cowles (2007)
Rosario Invertebrates web site provided courtesy of Walla