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male structu res as described by YAMAGUTI l 934) sor E. hamati; E. Picio Phali and E. Piaraiichthyilis. Ovary unlobed. wider than long almost naid way between posterior testis and end of soma. J5-3l0κl00 30: seminal receptacle absent: LAURER's canal not seen: uteri ne coiis extensive . extending Slightly posterior to vitellaria but not intruding inlo ecfoma: uteri ne vesicle present insonae, not evident in others si ona the sanae host, joining hermaphroditic duci at base os hermaphroditicsac. Vitelline tubes digitis orna, in two laterat groups os 4 and 3. not reaching end of soma. Eggs thin-sholicd. lJ-24κl0-l . Genital atrium ovoid to oblong. pore median near anterior levet os pharynx. Maiia excretory canals uni ted dorsal to pharynx.
MANTER and PRITCHARD sl 960) were the fit si to suggest that Uterove viculurus SKRJABIN et GUSCHAN SKAJA. l9β4 is a synonym os ErilmturuS WOOL-COCK. l 935 indicat ing that the uteri ne vesicle, a terminal dilation of the uterus which was the basis for erecting the genus Utersi eSiculuruS, may be a transientseature. Our specimens frona the different host species, as weli as severat frona thesanae host confirm the transiency of this feature: they also confirm the synonymyof Ectenuru ς hesmali. E. Plia ce hali and L. Piarcilichthynix. All three have similarterminal reproductive structu res, but disser in arrangement of the testes and si Ze. One notabie feature seen in some of our specimens was a parallel- si ded hermaph roditic fac sinus sac) in sonae specimens frona the sanae host, a characteristic of Sequestis YAMAGUTl. l9J0. E. Synodi YAMAGUTl l9J0 and E. trachinoce licitiYAMAGUTl. l9J0 accord ing to BRAY et est. l 993b). Except for this feature, allother structu res were practi catly identi cal. Differences in si Ze varieti a great dealamong Our specimens frona the fame host anil host species sTable 3): in generat thelai gest were frona ScomberoideS commer m etianus and the smallest in Lut janus ruX velli. Other than si Ze, the specimens frona the Various hosts were Very Similar.
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shori, bifurcat ing anterior to ventral sucker: caeca extending to posterior end of ecfoma. Testes globular to stightly triangular, contiguous. almost tandem. at junction os anterior and mi d-thirils of soma anterior testis 250κ250. posterior testis 250κ260. Seminal vesicle. spinille-s haped. 550κl20. thickwalled. wali l0-l 5 in thic ess, extending to junction os testes: pars prostatica tubular, win lingtwice posterior to ventral sucker, externalty lined with prostate celis along iis posterior hals. Ovaryentire, l40κ240. immediate ly posterior to posterior testis: uteri ne tubes o Verlapping. but not separat-ing. gonads, extending into anterior third os ccsoma, and anteriori y joining tip of prostatic iube justabove base of ventral sucker. Seminal receptacle absent. Vitelline sollicles tubular. 4 dextral and 3Fi s 3 . 3 α Lecithocliadium cingustiovum YAMAGUTI. l 934 from Ccircina cilles. Ventral vlew. Trac-ing frona a photomicrograph uterus not shown. 4 α Lecilliastor indiciis S RIVASTAVA l 935 si omotolithes ruber. Ventral vlew. Tracing si ona a photomicrograph, uterus not Slio n
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sinistrat, not extending anterior to ovary or into ecfoma. Hermaphroditic duci tubular, long open inginto genital pore at junction os orat suckeranis pharynx. Eggs i5-l8κl0-l3. Excretory arnas reachingpharyngeat region their union dorsal to junctionos orat suckerand pharynx could nol be determine l.
tat ger si Ze and comparatively larger structu res: minor disserences are observe lwhicli include the absence of bulbs at the posterior end of the orat sucker, and sonae hat wider eggs: the ovary is contiguous with the posterior testis and the tipsos the vitelline sollicles bai ely reach the ecfoma. In L. angi Stic Vum as figured by
soma-ecsoma junction and the Vitelline iubes are mostly in the anterior part of the CC SOma. This suggesis to tis constant features in a species collected frona different host species and disserent geographic locations. This is in contrast with the more anterior location of these two structui es in L. Dulbolabrum as sigured by REI D et est.
ovario-Vitelline complex. BRAY spers. comm.) suggested that the differen ces are very slight and probably could be ille result of the variable extension os the ecfomaor disserences in fixation. Severat of the Indian species listed as synonynas in BRAY
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l 990) show iliis variety os locations of the ovario- Vitellarium complex ranging
GUPTA and SEI GAL l9 l) repori the presen ce os a seminal receptacle, the lalter describing the seminal receptacle as 'very massive, illic k and tripartite . A true seminal receptacle is not evident in Our Specimens.
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Remai ks. Our single specimen combines severat characteristi cs seen in se V
erat species of A OnuruX which have been considered synonyms of or very similario, A. lGguncula. Most descriptions and figures silow spherical sollicles. In oui specimen they are ovo id, and in this respect more like A. elongestuX SID DIOl et
n. laguncula. Comparing the Kuwaiti materiat with specimens of A. elongialuX re
s hape and sucker ratio, the Kuwait specimen is typicatly n. laguncul&- ke. In most descriptions the ovary is usual ly anterior to the vitellarium whereas in Our specimen. the ovary is sui rounded by the vitelline sollicles. Considering the large num ber of hosis; at least 60 species of bony fishes in P families and 8 orders, accordii gio BRAY and MACKENTIE l 990) such variations are expected. A lGguncula has
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rensis HUSSAIN. RAO et S HYAMAS UNDARI l 984 froni Acanthuri S hleeheri, considered a synonym of A. laguncula. HUSSA IN et δε l. sl 984b) compared it with A. laguncula frona whicli it is distinguished by large seminal vesicle, win ling pars prostatica, median posterior testis, and vitelli ne iobes and seminal receptacle opposite ovary. The only species of APOntiri X that has been reponed frona Siganus is A. sigani ABDUL-AAL, BANAIA et AI - AN BAGI l 984 frona Siganus rivulatus si omthe Red Sea. A. Sigiani was described from l l specimens and repotaed to have fuitelline gland S. LecimaSter indictis S RIVASTAVA. l 93β
prostatic duci just anterior to ventral sucker. Vitelline glaniis seven, ovoid elongate, uni ted centralty almost contiguous with posterior ovarian iobes. Eggs thin-shelled, l2.5-lJ βκ8-l2. Genital pore median, at posterior levet os pharynx. Excretory vesicle tubulai . longili and extent of main canals notdetermine l. pore terminat.
illustration. One of the main characteristi cs of this species is ille more anterior lo-
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cation of the vitelline glaniis in relation to the tips of the intestinat caeca. In this feature it resembles, and is considered a synonym os, L. Stellati X LOOSS. l 90J as figured by BRAY et a l. l 993ci). In L. Stelliatus. however, the tength of each vitelline gland is 3 times the wid th. Becati se os our limited materiai, we prefer, fortite time being. to maintain the validi ty of L. iridicus. PARV KHlN l9JO) also reported L. consi Sus frona Atherina brevice X. A. afra in the Red Sea. The normal location os lectiliasterilis in the host is the intestine. The occur rence of APDnurus laguncula and Lecithia uter indiciis in the stomach is probab lydue to migration after death of their hosis
Measu rements on speci mens si ona cach os the smur host species a re presented in Tablo d.
dented giving appearance of two oves lapping glanus: Genital porc near junction os pharynx and orat
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Pharynx l20 4028 40 25 3532 35
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lMORSU rements. Our observations and measti rements Table d) suggest that relative si Ze of the vitellarium; the ovary and the testes are not reli able species characteristic s. A. duXXumieri seems to differ only in iis larger sucker ratio.
Achnowlei ments. The authors wish to thank Dr. RODNEY A. BRAY os The Natural HistoryMuseum. London sor his ad vice and assistance in the identification antllor confirmation os sonae os the species reported in this paper. The aut hors also wish to thank JENNIFER TAM. MARY TRAN and DAVlD POON sor their licis' in the preparation os the manuscript .