New Virgulid Cercaria (Trematoda, Lecithodendroidea) from the Mollusk Melanopsis praemorsa (Melanopsidae) from Azerbaijan Water Bodies. Morphology and Chaetotaxy of Cercaria agstaphensis 11
An illustrated morphological description with chaetotaxy and differential diagnosis of the new form of virgulid cercaria – Cercaria agstaphensis 11 from freshwater prosobranchial mollusks Melanopsis praemorsa (Linnaeus, 1758) are given. Special attention is paid to the tegument armament, the structu...
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| Cite this: | New Virgulid Cercaria (Trematoda, Lecithodendroidea) from the Mollusk Melanopsis praemorsa (Melanopsidae) from Azerbaijan Water Bodies. Morphology and Chaetotaxy of Cercaria agstaphensis 11 / A.A. Manafov // Вестник зоологии. — 2011. — Т. 45, № 2. — С. 105–111 . — Бібліогр.: 17 назв. — англ. |
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| citation_txt | New Virgulid Cercaria (Trematoda, Lecithodendroidea) from the Mollusk Melanopsis praemorsa (Melanopsidae) from Azerbaijan Water Bodies. Morphology and Chaetotaxy of Cercaria agstaphensis 11 / A.A. Manafov // Вестник зоологии. — 2011. — Т. 45, № 2. — С. 105–111 . — Бібліогр.: 17 назв. — англ. |
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| description | An illustrated morphological description with chaetotaxy and differential diagnosis of the new form of virgulid cercaria – Cercaria agstaphensis 11 from freshwater prosobranchial mollusks Melanopsis praemorsa (Linnaeus, 1758) are given. Special attention is paid to the tegument armament, the structure of glandular apparatus, excretory system, digestive system, the structure of the sensory apparatus and other larval morphological characters.
Приведены рисунки, описание морфологии, в том числе и хетотаксии, а также дифференциальный диагноз новой виргулидной церкарии – Cercaria agstaphensis 11 из пресноводного переднежаберного моллюска Melanopsis praemorsa (Linnaeus, 1758). Особое внимание уделено вооружению тегумента, строению железистого аппарата, экскреторной системы, пищеварительной системы, строению сенсорного аппарата и других морфологических особенностей строения личинок.
|
| first_indexed | 2025-12-07T17:44:03Z |
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Vestnik zoologii, 45(2): 105—111, 2011
UDC 576.895.122
NEW VIRGULID CERCARIA (TREMATODA,
LECITHODENDROIDEA) FROM THE MOLLUSK
MELANOPSIS PRAEMORSA (MELANOPSIDAE)
FROM AZERBAIJAN WATER BODIES.
MORPHOLOGY AND CHAETOTAXY
OF CERCARIA AGSTAPHENSIS 11
A. A. Manafov
Institute of Zoology NAS Azerbaijan Republic
Thoroughfare 1128, block 504, Baku, 1073 Azerbaijan
E-mail: asif_abbasoglu@mail.ru
Received 12 November 2009
Accepted 8 June 2010
New Virgulid Cercaria (Trematoda, Lecithodendroidea) from the Mollusk Melanopsis praemorsa
(Melanopsidae) from Azerbaijan Water Bodies. Morphology and Chaetotaxy of Cercaria agstaphensis 11.
Manafov A. A. – An illustrated morphological description with chaetotaxy and differential diagnosis of
the new form of virgulid cercaria – Cercaria agstaphensis 11 from freshwater prosobranchial mollusks
Melanopsis praemorsa (Linnaeus, 1758) are given. Special attention is paid to the tegument armament,
the structure of glandular apparatus, excretory system, digestive system, the structure of the sensory
apparatus and other larval morphological characters.
Ke y wo r d s: Melanopsis praemorsa, Cercaria agstaphensis, virgule, chaetotaxy.
Íîâûå âèðãóëèäíûå öåðêàðèè (Trematoda, Lecithodendroidea) ìîëëþñêà Melanopsis praemorsa
(Melanopsidae) èç âîäîåìîâ Àçåðáàéäæàíà. Ìîðôîëîãèÿ è õåòîòàêñèÿ Cercaria agstaphensis 11.
Ìàíàôîâ À. À. – Ïðèâåäåíû ðèñóíêè, îïèñàíèå ìîðôîëîãèè, â òîì ÷èñëå è õåòîòàêñèè, à òàêæå
äèôôåðåíöèàëüíûé äèàãíîç íîâîé âèðãóëèäíîé öåðêàðèè – Cercaria agstaphensis 11 èç ïðåñíî-
âîäíîãî ïåðåäíåæàáåðíîãî ìîëëþñêà Melanopsis praemorsa (Linnaeus, 1758). Îñîáîå âíèìàíèå
óäåëåíî âîîðóæåíèþ òåãóìåíòà, ñòðîåíèþ æåëåçèñòîãî àïïàðàòà, ýêñêðåòîðíîé ñèñòåìû, ïèùå-
âàðèòåëüíîé ñèñòåìû, ñòðîåíèþ ñåíñîðíîãî àïïàðàòà è äðóãèõ ìîðôîëîãè÷åñêèõ îñîáåííîñòåé
ñòðîåíèÿ ëè÷èíîê.
Êëþ÷åâûå ñ ëîâ à: âèðãóëà, õåòîòàêñèÿ, Melanopsis praemorsa, Cercaria agstaphensis.
Introduction
Host-parasite systems formed by mollusks and trematode parthenits are increasingly becoming now the
basis for different population and environmental studies, one of the main directions in development of mod-
ern parasitology. Data on parthenits (sporocysts and rediae) and cercariae are of the same importance. It is
impossible to create the phylogenetic system of Trematoda itself and Neodermata in general without such
information. The faunistic works on morphological description of parthenits and cercariae with detailed anal-
ysis of chaetotaxy made by present-day requirements always were and remain the basis for studies of this kind.
Despite the long traditions of researches on fauna of trematodes’ larvae and parthenits, today their overall
results are difficult to be considered as satisfactory. Fragmentary nature of our knowledge on mollusk para-
sites is mainly due to the fact that not all groups of mollusks were studied completely enough. The first objects
of study were inhabitants of the temperate zone – pulmonary mollusks and limited number of prosobranchia
mollusks (Bithynia, Valvata, Viviparus, etc.). At the same time trematode fauna of many groups of proso-
branchia mollusks, especially the richest tropical and subtropical fauna, is studied scanty or even not inves-
tigated at all. From this point of view, the representatives of the ancient and archaic family Melanopsidae
are of particular interest. Melanopsis praemorsa (fam. Melanopsidae) widespread in India, Central Asia and
the Mediterranean – (Starobogatov, 1970; Izzatullaev, Starobogatov, 1984) remained practically unexplored.
Ôàóíà è ñèñòåìàòèêà
Works done in the 1970th in small area in the Rhioni valley in the Western Georgia established surpris-
ing richness and diversity of M. praemorsa parasitic fauna, distinctive in its composition, and including a
number of human and animal pathogens (Olenev, Dobrovolsky, 1972; Olenev, Dobrovolsky, 1975; Olenev,
1979). According to personal communication, A. A. Dobrovolsky found 18 species of cercariae in Melanopsis
praemorsa belonging to, at least, 10 trematode families. However, only 7 species were identified:
Philophthalmus rhionica, which life cycle was studied in detail by I. A. Tikhomirov (1980); Cercaria rhionica
VII-larval stage of a species from the genus Echinochasmus; two species of cyathocotylid cercariae; hetero-
phyid larvae identified as Metagonimus yokogawai Takahashi 1929, larva referred to the family Sanguinicolidae
and furcocercaria relating to the family Strigeidae, and, by complex of morphological characters, close to cer-
cariae from the genus Cotylurus. Later other authors (Galaktionov, 1980; Galaktionov et al., 1980) made
detailed analysis of cyathocotylid cercariae and showed that, along with C. rhionica XI, there are other, mor-
phologically similar, forms not differentiated previously. Deciphering of life cycle showed that it was
Mesostephanus appendiculatus. M. G. Javelidze and E. A. Chiaberashvili (1973) worked in the same region
and described two species of stiletto cercariae. However, more or less accurate description is only for Cercaria
ginetsinskaja relating to “virgulae” group.
For the territory of Azerbaijan, mollusks Melanopsis praemorsa are common. However, before our stud-
ies, they have never been the objects of parasitological researches. Serious theoretical and practical signifi-
cance of such investigations determined the main plot of our work – comprehensive study of trematode
parthenites and cercariae which develop in freshwater mollusks M. praemorsa (Melanopsidae, Meso gastro -
poda – Prosobranchia) on the territory of Azerbaijan. The study showed that fauna of trematodes from
Melanopsidae was surprisingly rich and diverse, had unique composition and was not comparable with the
fauna of trematods parasitic in lung mollusks and common prosobranchia of temperate zone – Bithynia,
Valvata, Viviparus, etc. This group includes a number of species, potentially and actually pathogenic to
humans and animals.
In mollusk M. praemorsa from Azerbaijan water bodies, cercariae of 41 trematode species were found,
of which 33 were studied and described for the first time, cercariae of 3 species were redescribed (Manafov,
2010). The vast majority of species found (23) refers to Xiphidiocercariae group (order Plagiorchiida). Of
these, 21 species belong to Virgulee morphological group (superfam. Lecithodendroidea), and 2 – without
virgule – to Microcotyle group. Order Heterophyida is represented by 7 species, order Schistosomatida –
by 2 species (family Sanguinicolidae – 1; family Schistosomatidae – 1), order Strigeidida – by 5 species
(suborder Cyathocotylata – 4, and suborder Strigeata – 1 species). Families Echinostomatidae, Notoco -
tylidae and Philophthalmidae are represented by 1 or 2 species each. In this article morphological descrip-
tion and differential diagnosis of Cercaria agstaphensis 11 are given.
Material and methods
Mollusks were collected from 1982 to 2008 in different water bodies of Azerbaijan: rivers Kura,
Agstafachay, Dzhogaz, Kyurekchay; reservoirs Agstafa, Mingechavir, Varvara, Shemkir, Enikend; streams,
springs, artesian waters, canals and other waterways of the South Slope of the Greater Caucasus and the
north-eastern slope of the Lesser Caucasus. Totally, we examined 96, 718 mollusks and found cercariae of
41 trematode species belonging to at least 11 families.
To identify infected animals, collected mollusk were placed separately into 25 cm3 glass vessels filled
with water for 12—24 hours or more. Mollusks with cercariae were selected under dissection microscope
MBI—1. Morphology of parthenits, cercariae and metacercariae was studied on alive material. For this pur-
pose, dissection microscopes MBI—3, MBI—15 with phase contrast were used. All drawings were made with
aid of the drawing apparatus RA—4. To reveal sensillae in cercariae, traditional method of silver nitrate
impregnation (Ginetsinskaya, Dobrovolsky, 1963) and its modifications (Alekperov, Manafov, 1995) were
used. To analyze the chaetotaxy Richard (1971) nomenclature was used with additions of Bayssade-
Dufour (1979).
Measurements of parthenits and larvae were carried out on material fixed in 4% formalin, and 3% sil-
ver nitrate solution. In each case, the measurements were made on 15 larvae.
The measurements were processed statistically (Plokhinsky, 1978). The error of infection prevalence
(mp) was calculated for each water body (Petrushevski, Petrushevskaya, 1960).
First described species were assigned with code name Cercaria agstaphensis with corresponding serial
numbers by name of Akstafachay river.
Description of Cercaria agstaphensis 11
Cercaria has leaf-shaped body. Toward the posterior end it gradually narrows. The
tail is strongly contractile. After contraction it becomes unusually short and wide
(table 1, fig. 1). In larvae fixed in formalin its length is 1/4 of the body length, in lar-
vae fixed in silver nitrate – 1/3. Oral sucker is large. Its size is 1.5 times more the size
of abdominal sucker. Ventral sucker noticeably shifted to the posterior end of the lar-
val body. Oval opening of the ventral sucker is elongated transversely.
106 A. A. Manafov
107New Virgulid Cercaria from the Mollusk Melanopsis praemorsa...
Ta b l e 1. Measurements of Cercaria agstaphensis 11
Òàáëèö à 1. Ðàçìåðû Cercaria agstaphensis 11
Parameters
Size, mm
(min–max)
Median size, mm
(M)
Mean square
deviation (G)
Coefficient of
variation (CV)
Body length A 0.095—0.112 0.104 0.003 2.89
(0.091—0.095) (0.092) (0.002) (2.17)
Body width B 0.065—0.073 0.070 0.002 2.86
(0.065—0.068) (0.065) (0.001) (1.54)
Tail length 0.022—0.033 0.028 0.003 10.71
(0.035—0.039) (0.036) (0.001) (2.78)
Diameter of buccal sucker 0.033—0.036 0.035 0.001 2.86
(0.033—0.037) (0.035) (0.001) (2.86)
Diameter of ventral sucker 0.020—0.021 0.020 0.001 5.0
(0.020—0.021) (0.020) (0.001) (5.0)
Stiletto (length, width) 0.016—0.018 0.017 0.001 5.88
(0.017—0.018) (0.018) (0.0003) (1.67)
Tegument of the larval body is armed with small spines of the uniform size across
the surface. Spines covering the tail are somewhat longer.
Oral sucker is armed with powerful thin-walled stiletto with length of almost 1/2
of sucker diameter. Stiletto shoulders are well distinct. Stiletto stalk significantly
expands and ends with large bulb.
Mouth opening is subterminal. It leads to the gradually tapered cavity with walls
forming massive virgule with two deep constrictions. Buccal cavity leads into the short,
well-defined prepharinx followed by weakly muscular pharynx. Oesophagus is narrow
and long. Intestine is bifurcated at the level of anterior border of genital bud. Branches
of intestine reach the level of the middle of ventral sucker only. Oesophagus and intesti-
nal branches look like thin strands without lumen.
Three pairs of penetration gland cells form a wide arc rounding the ventral suck-
er in anteriorly (fig. 1, b).
Cells of the first pair of glands are shifted to the midline of the body. This becomes
especially apparent when the anterior end of the larval body is elongated and the ven-
tral sucker, not involved in this movement, ceases to divide glands.
Cells of the second and the third pairs of glands lie on either side of the sucker,
one after another. Their position relative to the sucker varies depending on the extent
and nature of the constriction of the larval body. The first and the third pairs of cells
contain coarsely granulated secret, highly light refracting. The secreta of the second pair
of cells is also coarsely granulated, but with different index of light refraction, therefore
these glands appear to be lighter. Ducts of penetration glands go separately to the level
of the middle of buccal sucker. Each duct along the whole its length forms several
unusually large “tanks” looking like single cells filled with secretion (fig. 1, b). Not far
from the front end of the body they form two bundles rounding oral sucker. Ducts of
the first and the third pairs of glands open near the tip of the stiletto, and the second
is closer to the middle.
Excretory formula: 2 [(2+2+2) + (2+2+2)] = 24.
Anterior and posterior longitudinal collective channels merge and give rise to the
main collective channel at the middle of ventral sucker, laterally. The main collective
channels form several loops and flow into the side branches of the bladder. Bladder is
U-shaped. Cells forming its walls contain granular cytoplasm. Excretory pore opens at
the base of the tail.
No t e. Measurements of larvae fixed in 4% formalin and measurements of larvae fixed 3% silver nit-
rate in parentheses.
Ïðèìå÷ àíèå.  òàáëèöå áåç ñêîáîê ïðèâîäÿòñÿ ðåçóëüòàòû èçìåðåíèÿ ëè÷èíîê, ôèêñèðîâàí-
íûõ â 4%-íîì ôîðìàëèíå, à â ñêîáêàõ – â 3%-íîì íèòðàòå ñåðåáðà.
Genital bud is undifferentiated and is composed of dense clumps of C-shaped cells.
Regarding the ventral sucker it is located dorso-laterally.
Larval parenchyma is transparent, with no fat droplets.
Chaetotaxy (topography of the sensory apparatus) of the larva described (fig. 2,
table 2) has a number of specific features. On the front end of the body, the fusion of
StV and St2 groups and formation of a single compact group StV + St2 is observed.
StDL group is represented by one zigzagging row. In AI area, L group is striking rep-
resented by three sensillae, and increased number of sensillae in the dorsal part (AID)
where each additional group is represented by three sensillae (3+4+3). The rest of the
dorsal surface bears very little sensillae. In AIIID area, only one pair is constant, while
the second (fig. 2, d, marked by additional circles) are absent in most larvae. In AIIID
area the only pair of sensillae is present. Beginning from M area, all other parts of the
dorsal surface have no sensillae. Lateral rows are developed better. Beginning in AIL
area, they lengthen to PIL area. On the ventral surface in preacetabular area sensillae
108 A. A. Manafov
Fig. 1. Cercaria agstaphensis 11: a – general view and armament of tegument; b – scheme of cercaria struc-
ture; c – stiletto; d – sporocysts.
Ðèñ. 1 Cercaria agstaphensis 11: a – îáùèé âèä è âîîðóæåíèå òåãóìåíòà; b – ñõåìà ñòðîåíèÿ öåðêà-
ðèè; c – ñòèëåò; d – ñïîðîöèñòû.
are located in AIIV and AIIIV areas. In preacetabular area, only three pairs of sensil-
lae are present.
The cercariae development is realized in thin walled sporocysts, which are oval or
rounded (fig. 1, d). Sporocysts’ size varies greatly. Sporocyst length is 0.099—
0.253 mm, width – 0.066—0.132 mm. Number of sporocysts in the digestive gland of
the mollusk can reach 2.000. Each sporocyst contains 4—7 formed cercariae and the
same number of embryos at different stages of development.
109New Virgulid Cercaria from the Mollusk Melanopsis praemorsa...
Fig. 2. Sensillae of Cercaria agstaphensis 11: a – ventral view; b – dorsal view; c – lateral view; d–e –
scheme of sensilla structure in the anterior part of larvae.
Ðèñ. 2. Ñåíñèëëû Cercaria agstaphensis 11: a – âèä ñ áðþøíîé ñòîðîíû; b – âèä ñî ñïèííîé ñòîðî-
íû; c – âèä ñáîêó; d–e – ñõåìà ñòðîåíèÿ ñåíñèëë â ãîëîâíîé ÷àñòè òåëà ëè÷èíêè.
Discussion
Of all larvae found, Cercaria agstaphensis 31 is the most similar to Cercaria
agstaphensis 11 having the same type of chaetotaxy, full armament of body and tail, and
“light” cells of the second pair of penetration glands. Nevertheless, these larvae clear-
ly differ in some characters. C. agstaphensis 31 is significantly smaller, its first and third
pairs of penetration glands are clearly distinguished by the type of secret granulation,
and the cells of the second pair contain transparent hyaline secretion and are optically
transparent. Significant differences are in excretory formula. These two larvae differ by
the structure of stiletto and the presence of small fat droplets in parenchyma of
C. agstaphensis 31.
In the literature some other larvae characterized by presence of “light” large cell
of penetration glands are also described. Primarily, this is C. indica XXXVII Sewell,
1922 that differs from C. agstaphensis 11 by larger size, slightly different ratio of the size
of penetration glands. Moreover, the larvae described by Sewell (1922) are character-
ized by completely different ratio of stiletto length and oral sucker diameter (1 : 3)
compared to that in C. agstaphensis 11 (1 : 2).
Cercaria notura, described by Hall (1960) from Goniobasis livescens (family
Pachychilidae) differs from C. agstaphensis 11 by larger size and excretory formula. The
same also applies to Cercaria pinguisoma (Hall, 1960). However, the virgule in C. agsta -
phensis 11 is much larger than that in C. pinguisoma. Cercaria pixiceps, similar to C. ags -
taphensis 11 by size and excretory formula, however, it differs markedly from the latter
by the structure of the stiletto and in the nature of cell granulation of the first and the
third pairs of penetration glands. Great number of characters allows us to distinguish
C. agstaphensis 11 from C. apatema described by Hall and Groves (1963).
Cercaria celatoglandis (Hall, 1960) differs from C. agstaphensis 11 by excretory
formula, relatively small virgule and very small cells of the second pair of penetration
glands.
Consequently, we could not assign the larva described from Azerbaijan water bod-
ies to any of previously described species, therefore we consider C. agstaphensis 11 an
independent species.
110 A. A. Manafov
Ta b l e 2. Description of sensillae arrangement in Cercaria agstaphensis 11
Òàáëèö à 2. Îïèñàíèå ðàñïîëîæåíèÿ ñåíñèëë Cercaria agstaphensis 11
Head (fig. 2, a, b, c )
Area of the mouth opening:
3 CI DL (1 CI D + 2 CI L)
1 CIII ; 5 C II2+3
1 CIIII ; 2 CIII2 ; 3 CIII3
Stiletto area:
6 StV + St2 ; 3+5 (6) St1
7 (8) StDL
Body (fig. 2, a, b, c )
- AI V ; 3 AI L ; 3+4+3 AI D
1 AII V ; - AII L ; 1 (2) AII D
1 AIII V ; 2 AIII L ; 1 AIII D
- MV ; 3 ML ; - MD
1 PI V ; 1 PI L ; - PI D
1 PII V ; - PII L ; - PII D
1 PIII V ; - PIII L ; - PIII D
3 (3/0) Act
Tail: 2 Ò
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111New Virgulid Cercaria from the Mollusk Melanopsis praemorsa...
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| id | nasplib_isofts_kiev_ua-123456789-65791 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 0084-5604 |
| language | English |
| last_indexed | 2025-12-07T17:44:03Z |
| publishDate | 2011 |
| publisher | Інститут зоології ім. І.І. Шмальгаузена НАН України |
| record_format | dspace |
| spelling | Manafov, A.A. 2014-07-02T17:00:12Z 2014-07-02T17:00:12Z 2011 New Virgulid Cercaria (Trematoda, Lecithodendroidea) from the Mollusk Melanopsis praemorsa (Melanopsidae) from Azerbaijan Water Bodies. Morphology and Chaetotaxy of Cercaria agstaphensis 11 / A.A. Manafov // Вестник зоологии. — 2011. — Т. 45, № 2. — С. 105–111 . — Бібліогр.: 17 назв. — англ. 0084-5604 https://nasplib.isofts.kiev.ua/handle/123456789/65791 576.895.122 An illustrated morphological description with chaetotaxy and differential diagnosis of the new form of virgulid cercaria – Cercaria agstaphensis 11 from freshwater prosobranchial mollusks Melanopsis praemorsa (Linnaeus, 1758) are given. Special attention is paid to the tegument armament, the structure of glandular apparatus, excretory system, digestive system, the structure of the sensory apparatus and other larval morphological characters. Приведены рисунки, описание морфологии, в том числе и хетотаксии, а также дифференциальный диагноз новой виргулидной церкарии – Cercaria agstaphensis 11 из пресноводного переднежаберного моллюска Melanopsis praemorsa (Linnaeus, 1758). Особое внимание уделено вооружению тегумента, строению железистого аппарата, экскреторной системы, пищеварительной системы, строению сенсорного аппарата и других морфологических особенностей строения личинок. en Інститут зоології ім. І.І. Шмальгаузена НАН України Вестник зоологии Фауна и систематика New Virgulid Cercaria (Trematoda, Lecithodendroidea) from the Mollusk Melanopsis praemorsa (Melanopsidae) from Azerbaijan Water Bodies. Morphology and Chaetotaxy of Cercaria agstaphensis 11 Новые виргулидные церкарии (Trematoda, Lecithodendroidea) моллюска Melanopsis praemorsa (Melanopsidae) из водоемов Азербайджана. Морфология и хетотаксия Cercaria agstaphensis 11 Article published earlier |
| spellingShingle | New Virgulid Cercaria (Trematoda, Lecithodendroidea) from the Mollusk Melanopsis praemorsa (Melanopsidae) from Azerbaijan Water Bodies. Morphology and Chaetotaxy of Cercaria agstaphensis 11 Manafov, A.A. Фауна и систематика |
| title | New Virgulid Cercaria (Trematoda, Lecithodendroidea) from the Mollusk Melanopsis praemorsa (Melanopsidae) from Azerbaijan Water Bodies. Morphology and Chaetotaxy of Cercaria agstaphensis 11 |
| title_alt | Новые виргулидные церкарии (Trematoda, Lecithodendroidea) моллюска Melanopsis praemorsa (Melanopsidae) из водоемов Азербайджана. Морфология и хетотаксия Cercaria agstaphensis 11 |
| title_full | New Virgulid Cercaria (Trematoda, Lecithodendroidea) from the Mollusk Melanopsis praemorsa (Melanopsidae) from Azerbaijan Water Bodies. Morphology and Chaetotaxy of Cercaria agstaphensis 11 |
| title_fullStr | New Virgulid Cercaria (Trematoda, Lecithodendroidea) from the Mollusk Melanopsis praemorsa (Melanopsidae) from Azerbaijan Water Bodies. Morphology and Chaetotaxy of Cercaria agstaphensis 11 |
| title_full_unstemmed | New Virgulid Cercaria (Trematoda, Lecithodendroidea) from the Mollusk Melanopsis praemorsa (Melanopsidae) from Azerbaijan Water Bodies. Morphology and Chaetotaxy of Cercaria agstaphensis 11 |
| title_short | New Virgulid Cercaria (Trematoda, Lecithodendroidea) from the Mollusk Melanopsis praemorsa (Melanopsidae) from Azerbaijan Water Bodies. Morphology and Chaetotaxy of Cercaria agstaphensis 11 |
| title_sort | new virgulid cercaria (trematoda, lecithodendroidea) from the mollusk melanopsis praemorsa (melanopsidae) from azerbaijan water bodies. morphology and chaetotaxy of cercaria agstaphensis 11 |
| topic | Фауна и систематика |
| topic_facet | Фауна и систематика |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/65791 |
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