Comparative Parasitology 67(2) 2000 - Peru State College

figures of the internal anatomy (whole mount),
hooks, or lamellodisc. However, L. furcillatus is
easily differentiated from L. baeri by the presence
of a nonrecurved point of the dorsal anchor
(point of dorsal anchor recurved in L. baeri).
Calydiscoides flexuosus (Yamaguti, 1953)
Young, 1969
(Figs. 43-52)
REDESCRIPTION (Table 2 for measurements):
Lamellodiscinae. Body long, fusiform; greatest
width usually at level of testis. Tegument
smooth. Cephalic margin tapered; 2 terminal, 2
bilateral cephalic lobes poorly developed; 3 bilateral
groups of head organs with anterior, posterior
groups associated with respective cephalic
lobes; cephalic glands posterolateral to pharynx.
Eyes 4; members of posterior pair larger, usually
closer together than anterior members; 1 member
of anterior pair occasionally absent; granules
usually ovate, variable in size; accessory granules
common in cephalic region. Mouth subterminal,
ventral to pharynx; pharynx ovate to subspherical;
esophagus short; intestinal ceca blind.
Peduncle broad. Haptor bilaterally lobed; lamellodiscs
similar, each with 10 "telescoping" lamellae,
posterior lamellae incomplete forming
posterior superficial opening. Ventral anchor
with elongate roots (superficial root longest)
usually overlying one another (Fig. 51), evenly
curved shaft, point recurved, not reaching level
of tip of superficial anchor root. Dorsal anchor
with short deep root, triangular superficial root,
curved shaft, point extending past level of tip of
superficial root. Ventral bar with tapered ends
directed anterolaterally, ventral groove. Paired
dorsal bar with bilobed medial end. Hooks similar;
each with protruding thumb with slightly
depressed end, delicate point, shank; hook pair
1 lying medial to ventral anchor at level of anterior
margin of ventral bar, pairs 2 (anterior), 3
lateral to ventral lamellodisc, pairs 4, 6 submarginal
in haptoral lobe, pair 5 associated with
ventral anchor shaft, pair 7 lateral to dorsal lamellodisc;
FH loop nearly shank length. Male
copulatory organ, accessory piece nonarticulated.
Male copulatory organ C-shaped, variably
sclerotized, with acute termination, 2 subterminal
branches embedded in wall of genital atrium
present or absent. Accessory piece variable, flattened.
Testis ovate; course of vas deferens in relation
to gut not observed; vas deferens tortuous
KRITSKY ET AL.—DIPLECTANIDS FROM KUWAIT 157
(Fig. 46), with anterior loop, expanded to form
seminal vesicle; prostatic reservoir not observed.
Ovary elongate pyriform, looping right
intestinal cecum, lying transversely to diagonally
anterodorsal to testis; oviduct elongate; ootype
an expanded portion of female duct, surrounded
by numerous glands; uterus with thick
wall, ventral to proximal portion of vas deferens,
extending dorsal to anterior loop of vas deferens.
Vaginal aperture sinistroventral; vagina variable,
funnel-shaped, narrowing to short tortuous tube;
seminal receptacle absent, or represented by
small expansion of vaginal duct prior to emptying
into female duct; vaginal funnel with sclerotized
clasp-like wall. Vitellaria coextensive
with gut, absent in regions of reproductive organs.
SYNONYMS: Lamellodiscus flexuosus Yamaguti,
1953; Lamellospina Indiana Karyakarte
and Das, 1978; Calydiscoides indicus Venkatanarsaiah
and Kulkarni, 1980.
HOST AND LOCALITIES: Notchedfin threadfin
bream, Nemipterus peronii (Valenciennes, 1830)
(originally identified as N. tolu [Valenciennes,
1830]) and Delagoa threadfin bream, Nemipterus
bipunctatus (Valenciennes, 1830) (originally
identified as N. delagoae Smith, 1941) (Nemipteridae):
Persian Gulf off Kuwait (31 December
1993, 10 January 1994, respectively). Japanese
threadfin bream, Nemipterus japonicus
(Bloch, 1791) (Nemipteridae): Port of Okha,
Gujarat, India.
PREVIOUS RECORDS: Ornate threadfin bream,
Nemipterus hexodon (Quoy and Gaimard, 1824)
(originally identified as Synagris taeniopterus
(Valenciennes, 1830): Macassar, Celebes (Yamaguti,
1953). Nemipterus japonicus: Ratnagiri,
west coast, Maharashtra, India (Karyakarte and
Das, 1978); Kakinada, Bay of Bengal, India
(Venkatanarsaiah and Kulkarni, 1980).
SPECIMENS STUDIED: 18 voucher specimens
from N. peronii, USNPC 89025, HWML
15019; 14 voucher specimens from N. bipunctatus,
USNPC 89026; 37 voucher specimens
from N. japonicus, USNPC 89024.
REMARKS: Yamaguti (1953) described Lamellodiscus
flexuosus from the gills of Synagris taeniopterus
(=Nemipterus hexodon) collected at
Macassar, Celebes. Young (1969) transferred this
helminth to Calydiscoides Young, 1969, based on
the presence of "telescoping lamellae" in the lamellodisc,
and Oliver (1987) recognized Young's
reassignment of L. flexuosus to Calydiscoides. In
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