Trematodes of the family Heterophyidae (Digenea) in Mexico: a review of species and new host and geographical records
Author
Scholz, T.
Author
Aguirre-Macedo, M. L.
Author
Salgado-Maldonado, G.
text
Journal of Natural History
2001
2001-12-31
35
12
1733
1772
http://www.tandfonline.com/doi/abs/10.1080/00222930152667087
journal article
10.1080/00222930152667087
1464-5262
5275922
Ascocotyle
(
Ascocotyle
)
tenuicollis
Price, 1935
(®gure 2)
Metacercaria
Morphology
. Aguirre-Macedo and GarcõÂa-MaganÄa (1994: 17; ®gure 7a, b),
Scholz
et al
. (1995: 179
; ®gure 3A, C±E) and
Scholz
et al
. (1997a: 163
; ®gure 1E±G, I) provided detailed descriptions of metacercariae that can easily be distinguished from those of other
Ascocotyle
species
by combination of the following features: cyst spherical, thin-walled; body pyriform; preoral lobe prominent; posterior appendage long, curved to convoluted, reaching to pharynx or overlapping it; oral sucker with 32 circumoral spines forming two complete rows of 16 spines each; intestinal caeca short, very wide, sacciform, preacetabular, containing discoidal corpuscles; excretory bladder voluminous, ®lled with large lipoid droplets.
FIG. 2.
Ascocotyle
(
Ascocotyle
)
tenuicollis
. Adults from the intestine of
Casmerodius albus
, PaÂtzcuaro Lake, MichoacaÂn
, misidenti®ed as
Ascocotyle leighi
(CNHE 1532)
. (A) Total view, ventrally; (B) anterior end (spines of the posterior row on the dorsal side not ®gured); (C, D) detail of the terminal genitalia, ventral and lateral views, respectively. Abbreviations: ed, ejaculatory duct; eg, eggs; g, gonotyl; gp, genital pore; ic, intestinal caecum; mvs, mouth of ventrogenital sac; oe, oesophagus; ph, pharynx; sv, seminal vesicle; u, uterus; vf, vitelline follicles; vs, ventral sucker.
Second intermediate hosts
.
Astyanax fasciatus
(Cuvier)
,
Bramocharax caballeroi
Contreras-Balderas and Rivera-Teillery (Characidae)
;
Poecilia catemaconis
Miller
,
P. latipunctata
Meek
,
P. mexicana
Steindachner
,
P. petenensis
(GuÈnther)
,
P. velifera
(Regan)
,
Poeciliopsis catemaco
Miller (Poeciliidae)
;
Cichlasoma argentea
Allgayer
,
C. aureum
(GuÈnther)
,
C. fenestratum
(GuÈnther)
,
C. friedrichstahli
(Heckel)
,
C. geddesi
(Regan)
,
C. helleri
(Steindachner)
,
C. intermedium
(GuÈnther)
,
C. lentiginosum
(Steindachner)
,
C. managuens
e
(GuÈnther),
C. nourissati
(Allgayer)
,
C. octofasci
- atum
(Regan),
C. pearsei
(Hubbs)
,
C. salvini
(GuÈnther)
,
C. synspilum
Hubbs
,
C. urophthalmus
(GuÈnther)
,
Cichlasoma
sp.
,
Petenia splendida
(GuÈnther) (Cichlidae)
;
Ophisternon aenigmaticum
Rosen and Greenwood (Synbranchidae)
.
Site
of infection
. Heart, exceptionally gill arches.
Distribution
.
Campeche
(El Vapor, El Viento, La Pera, Palizada, Rancho II, Santa Gertrudis);
Chiapas
(Cedros, LacanjaÂ);
Quintana Roo
(Bacalar, Box Toro, CabanÄas, Cenote Azul, Escondido, FramboyaÂn, La UnioÂn, Laguna Paiyegua, Mahahual, Ramonal, Raudales, RõÂo Hondo);
Tabasco
(Camellones Chontales, El Espino, Puyacatengo, Santa Anita, Tucta, YumkaÂ);
Veracruz
(Catemaco, Los TuxtlasÐBalzapote, La Palma, Las MaÂquinas); YucataÂn (CelestuÂn, Chaamac, Chen-haÂ, DzibilchaltuÂn, Mitza, Noc-choncunchey, Sahkaba).
References from
Mexico
. Aguirre-Macedo and GarcõÂa-MaganÄa (1994);
Scholz
et al
. (1995
,
1997a
); Salgado-Maldonad
o
et al.
(1997)
;
Scholz and Vargas-VaÂzquez (1998)
; Vidal-MartõÂnez
et al
. (2000); present study.
Specimens deposited
. CHCM-137, IPCAS D-345.
Adult
Morphology
.
Scholz
et al.
(1997a: 163
and 165; ®gure 1A±D, H) described adults from naturally and experimentally infected de®nitive hosts. The adult of
A
. (
A
.)
tenuicollis
from the intestine of
Casmerodius albus
Linnaeus
from PaÂtzcuaro Lake (MichoacaÂn), previously misidenti®ed as
A
.
leighi
(CNHE 1532Ðsee Comments)
, is illustrated in ®gure 2.
De
W
nitive hosts
.
Ardea herodias
,
Casmerodius albus
,
Buteogallus anthracinus
(Deppe)
,
Phalacrocora x
olivaceus
(Humboldt)
.
Site
of infection
. Intestine.
Distribution
.
Jalisco
(
Salinas
de Careyes), MichoacaÂn (PaÂtzcuaro), YucataÂn (CelestuÂn).
References from
Mexico
. Aguirre-Macedo and GarcõÂa-MaganÄa (1994);
Scholz
et al
. (1997a)
; present study.
Specimens deposited
. CHCM-361, IPCAS D-344.
Comments
. Cichlids are the most suitable second intermediate hosts but ®sh of other families may also harbour metacercariae that are normally encysted within the bulbus of the heart (
Scholz
et al
., 1997a
). Adults have been found in four species of ®sh-eating birds in
Mexico
, two of which (
A. herodias
and
P. olivaceus
) are new de®nitive hosts of this parasite. SepuÂlveda
et al
. (1999) found
A.
(
A
.)
tenuicollis
to belong to the most frequent (prevalence 54%) and numerous (mean intensity of infection
112 specimens
; range 1±1260) helminth parasites of
Casmerodius albus
in Florida.