Strelkowella urunbasiensis gen. et sp. n. (Suctoria, Allantosomatidae) from the Hindgut of the Yakut Horse
Обнаружена новая суктория семейства Allantosomatidae в содержимом кишечника якутской лошади. Предложен новый род Strelkowella gen. n., так как в отличие от других аллантосомид, данная инфузория имеет актинофоры. Типовой вид — Strelkowella urunbasiensis sp. n., это аллантосомида, у которой щупальца р...
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irk-123456789-33322010-09-30T16:57:14Z Strelkowella urunbasiensis gen. et sp. n. (Suctoria, Allantosomatidae) from the Hindgut of the Yakut Horse Kornilova, O.A. Краткие сообщения Обнаружена новая суктория семейства Allantosomatidae в содержимом кишечника якутской лошади. Предложен новый род Strelkowella gen. n., так как в отличие от других аллантосомид, данная инфузория имеет актинофоры. Типовой вид — Strelkowella urunbasiensis sp. n., это аллантосомида, у которой щупальца расположены на 6 актинофорах (по 3 актинофора на обоих концах тела). Щупальца (обычно по 6) увенчивают конец каждого актинофора. Новая суктория часто обнаруживается прикрепленной к телу Cycloposthium ponomarevi и C. dentiferum (Ciliophora, Entodiniomorphida). The new suctorian species presumably belonging to the family Allantosomatidae was recognized in digesta-samples from Yakut horses. The ciliate has actinophores, thus the new genus Strelkowella gen. n. is created for it. Strelkowella urunbasiensis sp. n. (type species of the genus) is the allantosomid with tentacles crowning, 6 actinophores (three actinophores on each end of the body). Commonly 6 equal capitate tentacles encircle the end of each actinophore. This new species was often observed adhered to the body of Cycloposthium ponomarevi and C. dentiferum (Ciliophora, Entodiniomorphida). 2004 Article Strelkowella urunbasiensis gen. et sp. n. (Suctoria, Allantosomatidae) from the Hindgut of the Yakut Horse / O.A. Kornilova // Вестн. зоологии. — 2004. — Т. 38, № 6. — С. 69-73. — англ. 0084-5604 http://dspace.nbuv.gov.ua/handle/123456789/3332 593.176 en Інститут зоології ім. І. І. Шмальгаузена НАН України |
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Краткие сообщения Краткие сообщения Kornilova, O.A. Strelkowella urunbasiensis gen. et sp. n. (Suctoria, Allantosomatidae) from the Hindgut of the Yakut Horse |
| description |
Обнаружена новая суктория семейства Allantosomatidae в содержимом кишечника якутской лошади. Предложен новый род Strelkowella gen. n., так как в отличие от других аллантосомид, данная инфузория имеет актинофоры. Типовой вид — Strelkowella urunbasiensis sp. n., это аллантосомида, у которой щупальца расположены на 6 актинофорах (по 3 актинофора на обоих концах тела). Щупальца (обычно по 6) увенчивают конец каждого актинофора. Новая суктория часто обнаруживается прикрепленной к телу Cycloposthium ponomarevi и C. dentiferum (Ciliophora, Entodiniomorphida). |
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Article |
| author |
Kornilova, O.A. |
| author_facet |
Kornilova, O.A. |
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Kornilova, O.A. |
| title |
Strelkowella urunbasiensis gen. et sp. n. (Suctoria, Allantosomatidae) from the Hindgut of the Yakut Horse |
| title_short |
Strelkowella urunbasiensis gen. et sp. n. (Suctoria, Allantosomatidae) from the Hindgut of the Yakut Horse |
| title_full |
Strelkowella urunbasiensis gen. et sp. n. (Suctoria, Allantosomatidae) from the Hindgut of the Yakut Horse |
| title_fullStr |
Strelkowella urunbasiensis gen. et sp. n. (Suctoria, Allantosomatidae) from the Hindgut of the Yakut Horse |
| title_full_unstemmed |
Strelkowella urunbasiensis gen. et sp. n. (Suctoria, Allantosomatidae) from the Hindgut of the Yakut Horse |
| title_sort |
strelkowella urunbasiensis gen. et sp. n. (suctoria, allantosomatidae) from the hindgut of the yakut horse |
| publisher |
Інститут зоології ім. І. І. Шмальгаузена НАН України |
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2004 |
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Краткие сообщения |
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http://dspace.nbuv.gov.ua/handle/123456789/3332 |
| citation_txt |
Strelkowella urunbasiensis gen. et sp. n. (Suctoria, Allantosomatidae) from the Hindgut of the Yakut Horse / O.A. Kornilova // Вестн. зоологии. — 2004. — Т. 38, № 6. — С. 69-73. — англ. |
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2025-07-02T06:39:03Z |
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2025-07-02T06:39:03Z |
| _version_ |
1836516212469661696 |
| fulltext |
UDÑ 593.176
STRELKOWELLA URUNBASIENSIS GEN. ET SP. N.
(SUCTORIA, ALLANTOSOMATIDAE)
FROM THE HINDGUT OF THE YAKUT HORSE
O. A. Kornilova
Herzen State Pedagogical University of Russia,
Moika, 48, St.-Petersburg, 191186 Russia
E-mail: quail@ctinet.ru
Accepted 5 February 2004
Strelkowella urunbasiensis gen. et sp. n. (Suctoria, Allantosomatidae) from the Hindgut of the Yakut
Horse. Kornilova O. A. — The new suctorian species presumably belonging to the family
Allantosomatidae was recognized in digesta-samples from Yakut horses. The ciliate has actinophores,
thus the new genus Strelkowella gen. n. is created for it. Strelkowella urunbasiensis sp. n. (type species
of the genus) is the allantosomid with tentacles crowning, 6 actinophores (three actinophores on each
end of the body). Commonly 6 equal capitate tentacles encircle the end of each actinophore. This new
species was often observed adhered to the body of Cycloposthium ponomarevi and C. dentiferum
(Ciliophora, Entodiniomorphida).
Key wo r d s: ciliates, suctorians, Allantosomatidae, Podophryida, Strelkowella urunbasiensis sp. n.,
endosymbionts, Protozoa, horse, Equus.
Strelkowella urunbasiensis gen. et sp. n. (Suctoria, Allantosomatidae) èç êèøå÷íèêà ÿêóòñêîé ëîøàäè.
Êîðíèëîâà Î. À. — Îáíàðóæåíà íîâàÿ ñóêòîðèÿ ñåìåéñòâà Allantosomatidae â ñîäåðæèìîì
êèøå÷íèêà ÿêóòñêîé ëîøàäè. Ïðåäëîæåí íîâûé ðîä Strelkowella gen. n., òàê êàê â îòëè÷èå îò
äðóãèõ àëëàíòîñîìèä, äàííàÿ èíôóçîðèÿ èìååò àêòèíîôîðû. Òèïîâîé âèä — Strelkowella
urunbasiensis sp. n., ýòî àëëàíòîñîìèäà, ó êîòîðîé ùóïàëüöà ðàñïîëîæåíû íà 6 àêòèíîôîðàõ (ïî
3 àêòèíîôîðà íà îáîèõ êîíöàõ òåëà). Ùóïàëüöà (îáû÷íî ïî 6) óâåí÷èâàþò êîíåö êàæäîãî
àêòèíîôîðà. Íîâàÿ ñóêòîðèÿ ÷àñòî îáíàðóæèâàåòñÿ ïðèêðåïëåííîé ê òåëó Cycloposthium pono-
marevi è C. dentiferum (Ciliophora, Entodiniomorphida).
Êëþ÷åâûå ñ ëîâ à: èíôóçîðèè, ñóêòîðèè, Allantosomatidae, Podophryida, Strelkowella urunba-
siensis sp. n., ýíäîñèìáèîíòû, Protozoa, ëîøàäü, Equus.
Introduction
The first endosymbiotic suctorian Allantosoma intestinalis Gassovsky, 1919 from the intestine of horse
Equus caballus L. was described by Gassovsky (1919) in Russia, St-Petersburg (Petrograd at that time). Later,
the replacement name A. intestinale (Aescht, 2001) was applied to it. This species with tentacles in two
fascicles on each end of body is widely-spreaded in equides (Kornilova, 2003) and induced the name of the
whole family Allantosomatidae Jankowski, 1978 (Jankowski, 1978; Dovgal, 2002).
T. Hsiung (1928) described two species in the genus — A. dicorniger Hsiung, 1928 and A. brevicorniger
Hsiung, 1928. A. Strelkow (1939) found three species — A. cucumis Strelkow, 1939, A. biseriale Strelkow,
1939 and A. lineare Strelkow, 1939. Imai (1979) described Allantosoma japonensis Imai, 1979, which was rena-
med later as A. japonense (Aescht, 2001).
According to the revised classification by Jankowski (1967, 1978) five species of suctorians were
distributed among two new genera: Arcosoma Jankowski, 1967 with only two tentacles (A. dicorniger, A. bre-
vicorniger, A. lineare) and Allantoxena Jankowski, 1978 with tentacles in the rows (A. biseriale and A. japo-
nense) (Dovgal, 2002; Kornilova, 2003). According to new feminine gender name Allantoxena — A. japonense
has to be Allantoxena japonensis (Imai, 1979) and the author accepts this name at present paper.
At the end of XX century, Allantosoma multisuctores Van Hoven, Gilchrist, Stenson, 1998 — the new
suctorian species in rhinoceros was found (Van Hoven et al., 1998). I. Dovgal (2002) revised the taxonomy
of that allantosomid and suggested the new genus Vanhovenia Dovgal, 2002. Vanhovenia multisuctores is
clearly distinguishable from the other allantosomids by numerous ingestory tentacles scattered uniformly over
the entire body. Thus the known allantosomides have different number and position of tentacles, but do not
have actinophores.
Vestnik zoologii, 38(6): 69–73, 2004
© O. A. Kornilova, 2004
Surwey of the endosymbiont ciliates from the intestine of Yakut horse (native in East Siberia) revealed
the presence of suctorian, which differs from all other allantosomids with respect of the disposition of
tentacles at the end of actinophores and is described here as new genus and new species.
Material and methods
The samples of intestinal digesta were collected from 8 Yakut horses (5 colts and 3 fillies 7–8 months
old) that were slaughtered in Khangalasski Region of Sakha Republic (Yakutia), near village Urun-Bas
(61.5° N, 128.5° E) in November 2001. Yakut horses are keeping free-pasturing in the mixed birch-larch
forest and flood-lands of Lena River without additional feeding all year round. There is a severe continental
climate with amplitude of air-temperature from — 65°C in winter to +35°C in summer. There are no stables
or sheds for horses. The slaughtering took place in “field conditions” with air-temperature — 35°C.
Sets of samples from caecum, ventral ascending colon, dorsal ascending colon, and descending colon
were collected. Samples of digesta were taken within 25–30 min after the horse had been slaughtered and
while the carcass was still warm. 10 ml of digesta was immediately added to 10 ml of warm 4% formalin.
In 2 horses, the new suctoria were found. They were observed by the light microscope. Some part of
material was stained with Mayer’s hematoxylin. For measurements of specimens, minimum and maximum
values are given, followed by the arithmetic mean and standard deviation in parentheses.
Strelkowella Kornilova, gen. n.
Typ e s p e c i e s: Strelkowella urunbasiensis Kornilova, sp. n.
Body elongate-cycloid with spherical macronucleus and 6 actinophores (three
actinophores on each end of body). Tentacles crown the edge of actinophore.
E t ymo l o g y. Generic name Strelkowella was selected to commemorate Alexander
A. Strelkow, the famous Russian ciliatologist who described many ciliates in the intes-
tine of equides.
Strelkowella urunbasiensis Kornilova, sp. n. (fig. 1–3)
Typ e ho s t. Yakut horse Equus caballus L.
Typ e l o c a l i t y. East Siberia, Khangalasski Region of Sakha Republic (Yakutia),
near the village Urun-Bas (61.5° N, 128.5° E).
Location in the host: S. urunbasiensis formed about 1% of the total ciliate popu-
lation in the ascending ventral colon (300/1 ml digesta), and rarely occured in the
ascending dorsal colon. It was not found in the caecum and in the descending colon.
Type material (syntype N 475) is deposited in the intestinal protozoa collection of
the Department of Zoology, Herzen State Pedagogical University of Russia, St.-
Petersburg.
E t ymo l o g y. Species name urunbasiensis refers to the place Urun-Bas (“White
Head” in Yakut language), where suctoria was found in Yakut horses.
70 O. A. Kornilova
Fig. 1. Microscope projection drawing of Strelkowella urunbasiensis from the colon of Yakut horse: ma —
macronucleus, mi — micronucleus, ac — actinophore with tentacles. Scale bar 10 mkm.
Ðèñ. 1. Strelkowella urunbasiensis èç êèøå÷íèêà ÿêóòñêîé ëîøàäè: ma — ìàêðîíóêëåóñ, mi —
ìèêðîíóêëåóñ, ac — àêòèíîôîð ñî ùóïàëüöàìè. Ìàñøòàáíàÿ ëèíåéêà 10 ìêì.
Description
Body is elongate-cycloid with ingestory suctorial tentacles crowning 6 slightly-
extensible actinophores (three actinophores on each end of body). Commonly 6 equal
capitate tentacles encircle the end of each actinophore. The spherical macronucleus
with small micronucleus is situated at the centre of the body. No obvious contractile
vacuoles could be seen (fig. 1; 2, 1, 2).
Body length 25–46 (35.8 ± 1.2) mkm; width (diameter) 8–18 (13.1 ± 0.6) mkm
and length to width ratio 2.25–3.93 (2.78 ± 0.10) (n = 40).
This new species was often observed adhered to the body of Cycloposthium pono-
marevi Kornilova, 2001 and C. dentiferum Gassovsky, 1919 (Entodiniomorphida,
Ciliophora) (fig. 2, 3–6). The suctorian usually adhere by single actinophore with ten-
tacles (fig. 3, 1) or by few ones (fig. 3, 2–5).
71Strelkowella urunbasiensis gen. et sp. n.
Fig. 2. Photomicrographs of specimens of Strelkowella urunbasiensis from the colon of Yakut horse: 1–2 —
free specimens; 3–6 — specimens sticking to Cycloposthium sp. Scale bars: 1, 2 — 10 mkm; 3, 4, 6 —
20 mkm; 5 — 40 mkm.
Ðèñ. 2. Ìèêðîôîòîãðàôèè Strelkowella urunbasiensis èç êèøå÷íèêà ÿêóòñêîé ëîøàäè: 1–2 —
íåïðèêðåïëåííûå îñîáè; 3–6 — îñîáè, ïðèêðåïèâøèåñÿ ê Cycloposthium sp. Ìàñøòàáíàÿ ëèíåéêà: 1,
2 — 10 ìêì; 3, 4, 6 — 20 ìêì; 5 — 40 ìêì.
1 2
3 4
5 6
Rema r k s. Strelkowella urunbasiensis is the first known allantosomid with actinophores. This fact
requires the revision of the family Allantosomatidae, because the absence of actinophores is characteristic in
the family diagnosis. Nevertheless S. urunbasiensis has common allantosomid features: sac-like unflattened
body, capitate tentacles, inhabitance in digestive tract of mammals.
Revised key to the family Allantosomatidae Jankowski, 1978, is presented to
include the new genus Strelkowella. The key is based on the number, length and posi-
tion of tentacles.
Key to species and genus of the family Allantosomatidae
Òàáëèöà äëÿ îïðåäåëåíèÿ âèäîâ è ðîäîâ ñåìåéñòâà Allantosomatidae
1 (16). Actinophores absent.
2 (15). Tentacles confined to each end of body.
3 (10). More than two tentacles.
4 (7). Tentacles in two fascicles on each end of body. ..................... Genus Allantosoma Gassovsky, 1919
5 (6). Tentacles scattered uniformly on rounded ends of body. ... Allantosoma intestinale Gassovsky, 1919
6 (5). Tentacles settle down on detached narrowed ends of body. The majority of tentacles turn to ventral
side of body. ............................................................................. Allantosoma cucumis Strelkow, 1939
7 (4). Tentacles in two rows on each end of body. ........................... Genus Allantoxena Jankowski, 1978
72 O. A. Kornilova
Fig. 3. Photomicrographs of specimens of Strelkowella urunbasiensis with different types of adhering. 1 —
specimen adhered by single actinophore with tentacles; 2 — specimen adhered by two actinophores with
tentacles; 3 — specimen adhered by three actinophores with tentacles, 4 — specimen adhered by
actinophores, situated on the opposite ends of suctoria; 5 — two suctories occuring on one host-specimen.
Scale bars: 1, 3, 5 — 40 mkm; 2, 4 — 20 mkm.
Ðèñ. 3. Ìèêðîôîòîãðàôèè Strelkowella urunbasiensis ñ ðàçíûìè ñïîñîáàìè ïðèêðåïëåíèÿ: 1 — îñîáü,
ïðèêðåïèâøàÿñÿ ïðè ïîìîùè îäíîãî àêòèíîôîðà; 2 — îñîáü, ïðèêðåïèâøàÿñÿ ïðè ïîìîùè äâóõ
àêòèíîôîðîâ; 3 — îñîáü, ïðèêðåïèâøàÿñÿ ïðè ïîìîùè òðåõ àêòèíîôîðîâ; 4 — îñîáü,
ïðèêðåïèâøàÿñÿ ïðè ïîìîùè àêòèíîôîðîâ, ðàñïîëîæåíííûõ íà ïðîòèâîïîëîæíûõ êîíöàõ òåëà
ñóêòîðèè; 5 — äâå ñóêòîðèè, ïðèêðåïèâøèåñÿ îäíîâðåìåííî ê îäíîé èíôóçîðèè-õîçÿèíó.
Ìàñøòàáíàÿ ëèíåéêà: 1, 3, 5 — 40 ìêì; 2, 4 — 20 ìêì.
1 2
3 4 5
8 (9). All tentacles (4–14) in rows on ends of body and lined closely to each other. ...............................
.................................................................................................. Allantoxena biseriale Strelkow, 1939
9 (8). Four tentacles are situated symmetrically on somewhat lateroventral sides, rest of tentacles (12–16)
lined on ends of body. ................................................................. Allantoxena japonensis Imai, 1979
10 (3). One tentacle confined to each end of body. ............................... Genus Arcosoma Jankowski, 1967
11 (12). Tentacles stretch along body axis. ................................................. Arcosoma lineare Strelkow, 1939
12 (11). Tentacles turned to ventral side of body.
13 (14). Tentacles long (length of each tentacle consisting 30–50% of body length). ...................................
................................................................................................................. A. dicorniger Hsiung, 1928
14 (13). Tentacles are short (length of each tentacle less than 15% of body length). ....................................
............................................................................................................. A. brevicorniger Hsiung, 1928
15 (2). Tentacles scattered uniformly over entire body surface. .............. Genus Vanhovenia Dovgal, 2002;
Vanhovenia multisuctores (Van Hoven et al., 1998)
16 (1). Tentacles in fascicles on actinophores on both ends of body. ...........................................................
............................................................. Genus Strelkowella gen. n.; Strelkowella urunbasiensis sp. n.
The author expresses his gratitude to Alexandra Pavlova of Yakut State Agricultural Academy for the
help in collecting samples.
Aescht E. Catalogue of the Generic Names of Ciliates (Protozoa, Ciliophora) // Denisia. — 2001. — 1. —
P. 1–350.
Dovgal I. V. Evolution, phylogeny and classification of Suctorea (Ciliophora) // Protistology. — 2002. — 2,
N 4. — P. 194–272.
Gassovsky G. N. On the microfauna of the intestine of the horse // Trav. Sec. Nat. Petrograd. — 1919. —
49, N 1. — P. 20–37, 65–69. — Russian.
Hsiung T. S. Suctoria of the large Intestine of the horse: Allantosoma intestinalis Gass, A. dicorniger, sp.
nov., and A. brevicorniger sp. nov. // Iowa St. Coll. Journ. Sci. — 1928. — 1. — P. 101–103.
Imai S. A new suctorian ciliate Allantosoma japonensis sp. nov. from the large intestine of the horse // Jap.
Soc. System. Zool. — 1979. — 16. — P. 1–4.
Jankowski A. V. New genera of tentacled Infusoria (Suctoria) // Proc. V Conference of young scientists of
Moldavia. — Kishinev, 1967. — P. 35–36. — Russian.
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Publ., 2003. — 216 p. — Russian with English summary.
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1998. — 37. — P. 113–124.
73Strelkowella urunbasiensis gen. et sp. n.
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