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PROCEEDINGS OF THE CALIFORNIA ACADEMY OF SCIENCES 
Series 4, Volume 64, No. 6 
superb teacher, scientist, 
philosopher, historian and 
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Description.— Exter¬ 
nal morphology. The living 
(Fig. 1A-B) holotype (Fig. 
1A-B) was approximately 30 
mm in length and 20 mm 
wide. The general body color 
is red to reddish orange with 
a series of large, well-spaced 
black spots present on the 
dorsal surface. The perfoliate 
rhinophores are conical with 
a series of 10-14 horizontal 
lamellae. The gill is com¬ 
posed of 7 bipinnae branch¬ 
es. The rhinophores and gill 
are the same color as the rest 
of the body. The body shape 
is oval. The notum is covered 
with a series of densely 
packed caryophyllidia (Fig 
2A). Each caryophyllidium 
bears 5-6 calcareous spines 
with a small ciliated tubercle 
located in its center. The anal 
papilla is situated within the 
circle of the branchial plume. 
The anterior border of the 
foot is labiate and notched. 
The foot is wide relative to 
the mantle margin. The oral 
tentacles are well-formed and 
appear conical in shape. 
Buccal armature: The 
labial cuticle is smooth with 
two small rectangular areas 
where chitinous jaws are 
present. The jaws contain 
numerous rodlets that are 
elongate and have a broader 
apical end (Fig. 2B). The 
radular formula of the holo¬ 
type is 73 X67.25.1.0.1. 
25.67 (Fig. 2C). The inner¬ 
most lateral teeth are deeply 
Figure 1. Living animals. A. Rostanga ghiselini sp. nov., specimen from 
Punta Gringa, Bahia de los Angeles, 14 March 1992, photo by Hans Bertsch. 
B. Rostanga ghiselini sp. nov., holotype specimen from Punta Gringa, Bahia de los 
Angeles, 25 March 2017, photo by Craig Hoover. C. Tenellia ivetteae sp. nov., 
holotype, CASIZ 220143 (upper animal) and paratype, CASIZ (lower animal), 
from Punta Gringa, Bahia de los Angeles, 30 June 1992, photo by Hans Bertsch. 
