Comparative Parasitology 67(2) 2000 - Peru State College

2)] long, slender, fusiform; greatest width 185
(120-240; n = 9) [164 (148-179; n = 2)] at
level of testis. Tegument smooth. Cephalic margin
narrow; 2 terminal, 2 bilateral cephalic lobes
poorly developed; 3 bilateral pairs of head organs
with anterior, posterior pairs associated
with respective cephalic lobes; cephalic glands
posterolateral to pharynx. Eyes 4; members of
posterior pair slightly larger, closer together than
anterior members; anterior pair frequently absent;
granules irregular, variable in size; accessory
granules common in cephalic region.
Mouth subterminal, ventral to pharynx; pharynx
73 (61-89, n = 10) [60 (51-70; n = 2)] wide,
ovate or somewhat truncated posteriorly; esophagus
short to nonexistent; intestinal ceca blind.
Peduncle narrow, elongate. Haptor 206 (169-
235; n = 8) [155 (150-161; n = 2)] wide, 111
(104-117; n = 8) [84 (79-89; n = 2)] long, with
3 bilateral pairs of lobes containing respective
hook pairs 2, 3, 4 near apices; anterior lobes
about half the length of more posterior lobes;
lamellodiscs similar, each 44 (37-53; n = 10)
[37 (35-39; n = 2)] long, 32 (29-38; n = 10)
[30 (29-31; n = 2)] wide, with 1 complete, 8
incomplete lamellae lacking medial indentation;
lamellae appear to telescope somewhat in dorsoventral
view. Ventral anchor 45 (38-49; n =
11) [42-43 (n = 1)] long, with elongaite roots
(deep root longest), evenly curved shaft, point
acutely recurved not reaching level of tip of superficial
root; base 14 (9-16; n = 8) wide. Dorsal
anchor 41 (37-44; n = 17) [35-36 (n = 1)]
long, with elongate deep root, short thickened
superficial root, straight shaft, point reaching
past level of tip of superficial root; base 9 (8-
10; n = 13) wide. Ventral bar 41 (34-47; n =
17) [36 (34-38; n = 2)] long, plate-like, with
short knob-like ends; dorsal bar 40 (35-46; n
= 23) [36 (34-38; n = 3)] long, with medial
bend, spinous projection at proximal end.
Hooks similar; each 10 (9-11; n = 28) [9-10
(n = 3)] long, with protruding slightly depressed
thumb, delicate point, shank; hook pair
1 lying near base of ventral anchor; pairs 2, 3,
4 at apices of respective haptoral lobes; pair 5
posterior to ends of ventral bar; pair 6 near
point of dorsal anchor; pair 7 near base of dorsal
anchor. FH loop nearly shank length. Copulatory
complex comprising articulated male
copulatory organ, accessory piece. Male copulatory
organ 45 (38-53; n = 22) [42-43 (n =
1)] long, a curved heavily sclerotized tube with
KRITSKY ET AL.~DIPLECTANIDS FROM KUWAIT 161
subterminal recurved spine, distal loop terminating
broadly; base of male copulatory organ
lacking sclerotized margin. Accessory piece 28
(18-34; n = 16) [32-33 (n = 1)] long, comprising
flattened proximal portion, bifurcating
near midlength to terminally acute elongately
striated branch, spatulate branch frequently
folded upon itself distally. Testis 107 (101-113;
n = 2) long, 52 (48-55; n = 2) wide, ovate;
vas deferens looping left intestinal cecum; seminal
vesicle fusiform, simple dilation of vas deferens,
lying slightly to left of body midline;
prostatic reservoir saccate, lying anterior to
copulatory complex. Ovary 47 (44-56; n = 5)
wide, pyriform, looping right intestinal cecum,
lying transversely to diagonally anterior to testis;
oviduct elongate; ootype, uterus not observed;
vaginal aperture sinistrodorsal, submarginal;
vagina short, nonsclerotized, with proximal
chamber containing apparent spermatophore,
opening into medial seminal receptacle;
vitellaria dense throughout trunk, except absent
in regions of reproductive organs. One egg (deformed
during mounting) infrequently present
in uterus, with short proximal filament.
TYPE HOST: King soldierbream, Argyrops
spinifer (Forsskal, 1775) (Sparidae).
TYPE LOCALITY: Persian Gulf off Kuwait (15
January 1994).
INFECTION SITE: Gills.
OTHER RECORD: Soldierbream, Argyrops filamentosus
(Valenciennes, 1830) (Sparidae): Persian
Gulf off Kuwait (18 October 1995).
SPECIMENS STUDIED: Holotype, USNPC
89005; 28 paratypes from A. spinifer, USNPC
89006, HWML 15021; 3 voucher specimens
from A. filamentosus, USNPC 89027.
ETYMOLOGY: The specific name is from Latin
(sen/i — six + lobat/o = lobe) and refers to
the 6 bilateral lobes of the haptor.
REMARKS: Oliver (1987) recognized 3 species
of Protolamellodiscus from hosts of 3 marine
teleost families: Protolamellodiscus serranelli
(Euzet and Oliver, 1965) Oliver, 1969, from
the comber, Serranus cabrilla (Linnaeus, 1758),
the brown comber, Serranus hepatus (Linnaeus,
1758), and the painted comber, Serranus scriba
(Linnaeus, 1758), Serranidae; Protolamellodiscus
convolutus (Yamaguti, 1953) Oliver, 1987,
from N. hexodon, Nemipteridae; and Protolamellodiscus
raibauti Oliver and Radujkovic,
1987, from the annular seabream, Diplodus annularis
(Linnaeus, 1758), Sparidae. The fourth
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