Comparative Parasitology 67(1) 2000 - Peru State College

4-5 spines each: 25.0-35.0 (31.4). Neck 202
long, 343 wide at base. Sensory pit 25.0 long,
32.5 wide, located 125 distal to most posterior
spine. Lemnisci long, slender, partly folded, extended
far into trunk.
The proboscis armature arrangement of M. orientalis
cystacanths is identical to that of adults
of this species as redescribed by Schmidt and
Kuntz (1977). However, the proboscis armature
and neck measurements of the cystacanths examined
differed from those of adults in the following
respects. The lengths of the middle 2-3
and posterior 1-2 hooks of cystacanths were
37.5-45.0 and 20.0-40.0, respectively, while
those listed for adults were 34-42 and 30-44
(Schmidt and Kuntz, 1977). The neck length and
width of female cystacanths and the neck width
of the male measured 131—192 by 364-455 and
333, respectively; the measurements of adult females
and males were reported as 216—240 by
530-600 and 500-535, respectively. The proboscis
of the male cystacanth was slightly longer
at 662, while the proboscides of adult males
were 500-600 long.
The proboscis hook and spine length measurements
of the cystacanth of M. wardi differed
slightly from those given for adults of this species
by Schmidt and Canaris (1967). Cystacanth
hook and spine length measurements ranged
from 22.5-37.5 and 25.0-35.0, respectively,
while those listed for adult M. wardi were 31.0—
36.0 and 21.0-28.0. The proboscis width of the
cystacanth was slightly narrower than in adults;
anterior and posterior proboscis width for the
cystacanth measured 402 and 409, respectively,
while the corresponding measurements reported
for adults were 425 and 515-545. Neck length
of the cystacanth was slightly longer than adults,
measuring 202, while the reported adult neck
length was 165. Additionally, the cystacanth did
not show any evidence of an anterior trunk
BOLETTE—RESEARCH NOTES 117
swelling, as described for adults. However, because
the armature arrangement and all other
proboscis measurements are consistent with
those described by Schmidt and Canaris (1967)
for adult M. wardi, the single female specimen
was assigned to this species.
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Copyright © 2011, The Helminthological Society of Washington