Arhythmorhynchus capellae sp. n. is described. The description is based on seven males and seven females from the Common Snipe in northern Colorado. The species is contrasted with two similar species, A. comptus Van Cleave and Rausch, 1950 and A. eroliae (Yamaguti, 1939) Van Cleave and Rausch, 1950. It differs from the former in having 14 proboscis hooks per row rather than eight or nine, and from the latter in having no bursal rays and 16 rows of 14 hooks rather than 18 rows of 12 to 13 hooks

Schmidt, Gerald D.

English

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University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Faculty Publications from the Harold W. Manter Laboratory of Parasitology Parasitology, Harold W. Manter Laboratory of 6-1963 Arhythmorhynchus capellae sp. n. (Polymorphidae: Acanthocephala), A Parasite of the Common Snipe Capella gallinago delicata Gerald D. Schmidt University of Northern Colorado Follow this and additional works at: https://digitalcommons.unl.edu/parasitologyfacpubs  Part of the Parasitology Commons Schmidt, Gerald D., "Arhythmorhynchus capellae sp. n. (Polymorphidae: Acanthocephala), A Parasite of the Common Snipe Capella gallinago delicata" (1963). Faculty Publications from the Harold W. Manter Laboratory of Parasitology. 396. https://digitalcommons.unl.edu/parasitologyfacpubs/396 This Article is brought to you for free and open access by the Parasitology, Harold W. Manter Laboratory of at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Faculty Publications from the Harold W. Manter Laboratory of Parasitology by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. THE JOURNAL OF PARASITOLOGY Vol. 49, No. 3, June 1963, p. 483-484 Arhythmorhynchus capellae sp. n. (Polymorphidae: Acanthocephala), A Parasite of the Common Snipe Capella gallinago delicata* GERALD D. SCHMIDT Department of Zoology, Colorado State University, Fort Collins ABSTRACT Arhythmorhynchus capellae sp. n. is described. The description is based on seven males and seven females from the Common Snipe in northern Colorado. The species is contrasted with two similar species, A. comptus Van Cleave and Rausch, 1950 and A. eroliae (Yamaguti, 1939) Van Cleave and Rausch, 1950. It differs from the former in having 14 proboscis hooks per row rather than eight or nine, and from the latter in having no bursal rays and 16 rows of 14 hooks rather than 18 rows of 12 to 13 hooks. This species is described from 14 specimens, seven males and seven females, recovered from the small intestines and ceca of six Common Snipe Capella gallinago delicata taken between January 1961 and March 1962 in northeastern Colorado. All measurements are in microns unless otherwise indicated. Arhythmorhynchus capellae sp. n. Description: Bright yellow and wrinkled when removed from gut. Trunk long and narrow with slight inflation at anterior end. Proboscis nearly cylindrical, armed with 16 longitudinal rows of 14 hooks each, 50 long and not appreciably heavier midventrally; the first three and last four hooks in each row more delicate, measuring 42 to 45 long. Neck about 350 long. Body spines extend about 1.74 mm posterior from neck, less numerous toward rear; length 30 to 35. Subcuticular nuclei restricted to narrow band at swollen area of trunk. Male: Length 12 to 41 mm (35 mm); diameter at midpoint of body 222 to 666 (494). Proboscis length 610 to 721 (653); width 144 to 200 (166). Armature same in male and female. Two testes contiguous, each about 1.43 mm long, located 1.10 to 1.30 mm behind field of body spines. Two tubular cement glands extend from area imme- Received for publication 17 September 1962. * Part of a thesis submitted to the Graduate School of Colorado State University in partial fulfill- ment of the requirements for the degree of Master of Science, March 1962, under the direc- tion of Dr. O. W. Olsen. This investigaiton was in part supported by a training grant [PHS-2E-94 (cl)] from the Insti- tute of Allergy and Infectious Diseases of the National Institutes of Health, U. S. Public Health Service. diately behind posterior testis and join common sperm duct posterior to Saefftigen's pouch. 50,u 3 E E Ju 0 0 a Arhythmorhynchus capellae sp. n. FIGURE 1. Allotype female. FIGURE 2. Proboscis of paratype male. FIGURE 3. Mature egg, observed in pseudocoel of fixed and stained female. 483 484 THE JOURNAL OF PARASITOLOGY Vol. 49, No. 3 Female: Length 20 to 50 mm (37 mm); diam- eter at midpoint of body 432 to 666 (548). Pro- boscis length 666 to 721 (695); diameter 122 to 233 (160). Suspensory ligament degenerating early; developing eggs and ovarian balls filling pseudocoel. Uterine bell 67 wide at top, tapering to 7 in the center of the first of two large uterine sphincters; length 195. Muscular vagina 80 long by 75 wide. Length from mouth of uterine bell to vaginal opening, 410. Mature eggs 92 to 100 long by 17 to 20 wide, measured in pseudocoel of fixed and stained female worm. Immature eggs with small knob at each end. Host: Capella gallinago delicata. Habitat: Small intestine and cecum. Locality: Northeastern Colorado. Type specimen: Holotype male, allotype female USNM Helm. Coll. No. 59657. DISCUSSION Of the 21 species of Arythmorhynchus re- corded in the literature, only A. comptus Van Cleave and Rausch, 1950 from sandpipers in Alaska and A. eroliae (Yamaguti, 1939) Van Cleave and Rausch, 1950 from sandpipers in Japan are sufficiently similar to the present species to warrant differentiation. The other species differ greatly in size, shape, and ar- rangement of hooks, shape of proboscis, and internal anatomy. A. comptus differs from A. capellae in that its proboscis is shorter and spindle-shaped, its body spines are smaller, and its embryo is larger. Also, only eight or nine proboscis hooks are present in each row compared with 14 in A. capellae. A. eroliae possesses 18 rows of 12 to 13 hooks and bursal rays, while A. capellae has 16 rows of 14 hooks and no bursal rays. These differences are deemed adequate to justify designating the specimens from Colo- rado as a new species. LITERATURE CITED VAN CLEAVE, H. J., AND R. L. RAUSCH. 1950. A new species of Arhythmorhynchus from sand- pipers of Alaska. J. Parasit. 36: 278-283. YAMAGUTI, S. 1939. Studies on the helminth fauna of Japan. Part 29. Acanthocephala, II. Jap. J. Zool. 8: 317-351. 

\u3ci\u3eArhythmorhynchus capellae\u3c/i\u3e sp. n. (Polymorphidae: Acanthocephala), A Parasite of the Common Snipe \u3ci\u3eCapella gallinago delicata\u3c/i\u3e

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University of Nebraska - Lincoln 
DigitalCommons@University of Nebraska - Lincoln 
Faculty Publications from the Harold W. Manter 
Laboratory of Parasitology Parasitology, Harold W. Manter Laboratory of 
6-1963 
Arhythmorhynchus capellae sp. n. (Polymorphidae: 
Acanthocephala), A Parasite of the Common Snipe Capella 
gallinago delicata 
Gerald D. Schmidt 
University of Northern Colorado 
Follow this and additional works at: https://digitalcommons.unl.edu/parasitologyfacpubs 
 Part of the Parasitology Commons 
Schmidt, Gerald D., "Arhythmorhynchus capellae sp. n. (Polymorphidae: Acanthocephala), A Parasite of 
the Common Snipe Capella gallinago delicata" (1963). Faculty Publications from the Harold W. Manter 
Laboratory of Parasitology. 396. 
https://digitalcommons.unl.edu/parasitologyfacpubs/396 
This Article is brought to you for free and open access by the Parasitology, Harold W. Manter Laboratory of at 
DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Faculty Publications from 
the Harold W. Manter Laboratory of Parasitology by an authorized administrator of DigitalCommons@University of 
Nebraska - Lincoln. 
THE JOURNAL OF PARASITOLOGY 
Vol. 49, No. 3, June 1963, p. 483-484 
Arhythmorhynchus capellae sp. n. (Polymorphidae: Acanthocephala), 
A Parasite of the Common Snipe Capella gallinago delicata* 
GERALD D. SCHMIDT 
Department of Zoology, Colorado State University, Fort Collins 
ABSTRACT 
Arhythmorhynchus capellae sp. n. is described. The description is based on seven males 
and seven females from the Common Snipe in northern Colorado. The species is contrasted 
with two similar species, A. comptus Van Cleave and Rausch, 1950 and A. eroliae (Yamaguti, 
1939) Van Cleave and Rausch, 1950. It differs from the former in having 14 proboscis 
hooks per row rather than eight or nine, and from the latter in having no bursal rays and 
16 rows of 14 hooks rather than 18 rows of 12 to 13 hooks. 
This species is described from 14 specimens, 
seven males and seven females, recovered from 
the small intestines and ceca of six Common 
Snipe Capella gallinago delicata taken between 
January 1961 and March 1962 in northeastern 
Colorado. 
All measurements are in microns unless 
otherwise indicated. 
Arhythmorhynchus capellae sp. n. 
Description: Bright yellow and wrinkled when 
removed from gut. Trunk long and narrow with 
slight inflation at anterior end. Proboscis nearly 
cylindrical, armed with 16 longitudinal rows of 14 
hooks each, 50 long and not appreciably heavier 
midventrally; the first three and last four hooks in 
each row more delicate, measuring 42 to 45 long. 
Neck about 350 long. Body spines extend about 
1.74 mm posterior from neck, less numerous toward 
rear; length 30 to 35. Subcuticular nuclei restricted 
to narrow band at swollen area of trunk. 
Male: Length 12 to 41 mm (35 mm); diameter 
at midpoint of body 222 to 666 (494). Proboscis 
length 610 to 721 (653); width 144 to 200 (166). 
Armature same in male and female. Two testes 
contiguous, each about 1.43 mm long, located 1.10 
to 1.30 mm behind field of body spines. Two 
tubular cement glands extend from area imme- 
Received for publication 17 September 1962. 
* Part of a thesis submitted to the Graduate School 
of Colorado State University in partial fulfill- 
ment of the requirements for the degree of 
Master of Science, March 1962, under the direc- 
tion of Dr. O. W. Olsen. 
This investigaiton was in part supported by a 
training grant [PHS-2E-94 (cl)] from the Insti- 
tute of Allergy and Infectious Diseases of the 
National Institutes of Health, U. S. Public Health 
Service. 
diately behind posterior testis and join common 
sperm duct posterior to Saefftigen's pouch. 
50,u 
3 
E E Ju 0 
0 
a 
Arhythmorhynchus capellae sp. n. 
FIGURE 1. Allotype female. 
FIGURE 2. Proboscis of paratype male. 
FIGURE 3. Mature egg, observed in pseudocoel of 
fixed and stained female. 
483 
484 THE JOURNAL OF PARASITOLOGY Vol. 49, No. 3 
Female: Length 20 to 50 mm (37 mm); diam- 
eter at midpoint of body 432 to 666 (548). Pro- 
boscis length 666 to 721 (695); diameter 122 to 
233 (160). Suspensory ligament degenerating 
early; developing eggs and ovarian balls filling 
pseudocoel. Uterine bell 67 wide at top, tapering 
to 7 in the center of the first of two large uterine 
sphincters; length 195. Muscular vagina 80 long 
by 75 wide. Length from mouth of uterine bell to 
vaginal opening, 410. Mature eggs 92 to 100 long 
by 17 to 20 wide, measured in pseudocoel of fixed 
and stained female worm. Immature eggs with 
small knob at each end. 
Host: Capella gallinago delicata. 
Habitat: Small intestine and cecum. 
Locality: Northeastern Colorado. 
Type specimen: Holotype male, allotype female 
USNM Helm. Coll. No. 59657. 
DISCUSSION 
Of the 21 species of Arythmorhynchus re- 
corded in the literature, only A. comptus Van 
Cleave and Rausch, 1950 from sandpipers in 
Alaska and A. eroliae (Yamaguti, 1939) Van 
Cleave and Rausch, 1950 from sandpipers in 
Japan are sufficiently similar to the present 
species to warrant differentiation. The other 
species differ greatly in size, shape, and ar- 
rangement of hooks, shape of proboscis, and 
internal anatomy. 
A. comptus differs from A. capellae in that 
its proboscis is shorter and spindle-shaped, its 
body spines are smaller, and its embryo is 
larger. Also, only eight or nine proboscis hooks 
are present in each row compared with 14 in 
A. capellae. A. eroliae possesses 18 rows of 
12 to 13 hooks and bursal rays, while A. 
capellae has 16 rows of 14 hooks and no bursal 
rays. These differences are deemed adequate 
to justify designating the specimens from Colo- 
rado as a new species. 
LITERATURE CITED 
VAN CLEAVE, H. J., AND R. L. RAUSCH. 1950. A 
new species of Arhythmorhynchus from sand- 
pipers of Alaska. J. Parasit. 36: 278-283. 
YAMAGUTI, S. 1939. Studies on the helminth 
fauna of Japan. Part 29. Acanthocephala, II. 
Jap. J. Zool. 8: 317-351. 


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\u3ci\u3eArhythmorhynchus capellae\u3c/i\u3e sp. n. (Polymorphidae: Acanthocephala), A Parasite of the Common Snipe \u3ci\u3eCapella gallinago delicata\u3c/i\u3e

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