| Latocestus ocellatus Marcus, 1947 | 1949 or earlier in the 1940s, | upper littoral | algae |  | 
| Triadomma curvum Marcus, 1949 | Sep 1948 | upper littoral | algae | 4 specimens, on cushions of algae and under calcareous algae, near the low tide line, collected on the maximum ebb tide / algae | 
| Haploposthia microphoca Marcus, 1950 | Nov 1949 | upper littoral | algae | 2 mature specimens. / algae | 
| Necia sopha Marcus, 1950 | Sep 1948; Apr, Jun, Nov 1949 | upper littoral | algae | breakers, eddy or undertow zone on beach. / algae | 
| Adenoplana evelinae Marcus, 1950 | Nov 1949 | upper littoral | algae | 2 mature specimens. / algae | 
| Hoploplana divae Marcus, 1950 | Nov 1949 | upper littoral | algae | 1 mature specimen / algae | 
| Prosthiostomum gilvum Marcus, 1950 | Nov 1949 | upper littoral | algae | 2 mature specimens. / algae | 
| Prosthiostomum cynarium Marcus, 1950 | Nov 1949 | upper littoral | algae | 8 specimens (mature, quasi mature, masculine juveniles and immatures). / algae | 
| Brinkmanniella augusti Marcus, 1951 | Jun, Nov 1949 | upper littoral | algae | collected below the low tide line.  20 specimens, proterandrous to a high degree. / algae | 
| Lenopharynx triops Marcus, 1951 | Nov 1949 | upper littoral | algae | 10 specimens. / algae | 
| Urastoma evelinae Marcus, 1951 | Nov 1949 | upper littoral | algae | 60 juveniles. / algae | 
| Plagiostomum kurrum Marcus, 1951 | Nov 1949 | upper littoral | algae | 4 specimens. / algae | 
| Tuilica evelinae Marcus, 1951 | Nov 1949 | upper littoral | algae |  | 
| Convoluta thauma Marcus, 1952 | 1946-1950 | upper littoral | algae | lives among algae in the upper littoral Ilhas das Palmas (bay of Santos); island of Sao Sebastiao, material gathered over several years. / algae | 
| Hallangia evelinae Marcus, 1952 | 1952 or earlier to 1944 | upper littoral | algae | algae of the upper littoral.  Taquanduva and other places in algae. / algae | 
| Promesostoma scylax Marcus, 1952 | Jun, Nov 1952 or earlier to 1944 | upper littoral | algae | from the algae of the upper littoral.  Juveniles in the winter (Jun). / algae | 
| Haloplanella ibla Marcus, 1952 | Nov 1952 or earlier Nov to 1944 | upper littoral | algae | from the algae of the upper littoral.  2 specimens. / algae | 
| Ruanis pandula Marcus, 1952 | May, Nov 1952 or earlier May, Nov to 1944 | upper littoral | algae | from the algae of the upper littoral.  15 specimens. / algae | 
| Tangaroa pusa Marcus, 1952 | 1952 or earlier to 1944 | upper littoral | algae | in algae of the upper littoral.  6 specimens. / algae | 
| Toia ycia Marcus, 1952 | 1952 or earlier to 1944 | upper littoral | algae | in algae of the upper littoral.   100 specimens from two locations. / algae | 
| Cylindrostoma hyljeum Marcus, 1952 | Nov 1952 or earlier Nov to 1946 | upper littoral | algae |  | 
| Plagiostomum lapinum Marcus, 1952 | Nov 1952 or earlier Nov to 1946 | upper littoral | algae | numerous animals found in mud with sand in a very shallow bay near Sao Sebastiao.  Also between Sao Sebastiao and Caraguatatuba. / algae | 
| Stylochus ticus Marcus, 1952 | Jun 1952 or earlier Jun to 1946 | upper littoral | algae | upper littoral / algae | 
| Notoplana megala Marcus, 1952 | Jun 1952 or earlier Jun to 1946 | upper littoral | algae | 3 specimens in algae of upper littoral. / algae | 
| Itannia ornata Marcus, 1947 | Nov 1949 | upper littoral | algae |  | 
| Pseudoceros hispidus Du Bois-Reymond Marcus, 1955 | Dec 6, 1953 | upper littoral | algae | 2 mature specimens among algae (Padina) growing on stones in the upper littoral. / algae |