Definition: Marcus E 1950 (citation)- p 14-15, figures 16-18..
Geographic distribution: Brazil, Isle of Sao Sebastiao, algae and gray mud, 5 meters- type
locatity.
Lectotype: Dorjes J, Karling TG 1975 (citation)- Swedish Museum of Natural History, #2750, p 183.
Marcus E 1950 (citation)- describes this species and compares other of genus, p 13, 14-15, 102-3 notes
male speciments in October. By November also females.
"Paraphanostoma westbladi, n. sp. (Fig. 16-18), 1.5 mm long alive, was found between algae
Ilha das Palmas (bay of Santos) and in the same biotope as well as in gray mud (about 5 m
depth) of the island of São Sebastião. It belongs to the species with musculous seminal
vesicle (macroposthium, brachyposthium) and with a spermatic duct (z). The male copulatory
organ of westbladi is, even in details, identical with that of macroposthium, though it is
a little smaller. Notwithstanding westbladi must be separated from macroposthium, as its
bursa (u) has neither a posterior pouch nor cuticular hooks. Moreover, westbladi is
cytologically exceptional by its big nuclei (average diameter 8 micra; in the spermatogonia
10-12 micra) that are scarce in all tissues. This character does neither occur in
brachyposthium, a species two times or more bigger than westbladi, with the female pore
between mouth and male opening (in westbladi and macroposthium it is nearer to the mouth)
and small eggs. The longitudinal and transverse parenchymatic muscles of brachyposthium
are absent in westbladi. The brain of the new species differs greatly from that described
for P. submaculatum and crassum, where the ganglion lies behind the statocyst and has two
horns directed forward and upward. In P. westbladi the statocyst lies behind the commisure
of the internal or dorsal ganglia and on the level of this commisure. The commisure of the
external or ventral ganglia is caudal and ventral to the statocyst.
Follicle-cells (i) suround even the largest ovocytes (length: 0.1 mm; height: 1.6 mm) of our
material; there are 3-4 nucleoli inthe ovocytes as in macroposthium and brachyposthium.
female antrum (w) is globose and of spongeous, vacuolized structure. The spermatic duct (z)
inserts at the level of the constriction between antrum and bursa (u), not exclusively
at the front-wall of the bursa (macroposthium, brachyposthium).
Marcus E 1954 (citation)- mentions p 426, 427, 428, 429, 450.
Dorjes J 1968 (citation)- lists.
Dorjes J, Karling TG 1975 (citation)- Swedish Museum of Natural History, p 183 distribution and comments.
Figure of female parts- closely related to P. macroposthium and P. etium.
Notes from synonyms