Global Cestode DatabaseCestode Scientific Name
| Species ID | 13641 |
|---|---|
| Order | Diphyllidea |
| Family | |
| Subfamily | |
| Genus | Halysioncum |
| Species | mexicanum |
| Authority | (Tyler & Caira, 1999) Caira, Marques, Jensen, Kuchta & Ivanov, 2013 |
| Taxonomic Status | Valid |
| Valid Name | |
| Synonyms | Echinobothrium mexicanum Tyler & Caira, 1999 |
| Genus Record | No |
| Type Species | Yes |
| Verified | No |
| Verified By | |
| Citation(s) |
Tyler, G. A. and J. N. Caira. 1999. Two new species of Echinobothrium (Cestoidea: Diphyllidea) from myliobatiform elasmobranchs in the gulf of California, Mexico. Journal of Parasitology 85: 327-335. (3838) Download PDFCaira, J. N., F. P. L. Marques, K. Jensen, R. Kuchta, and V. Ivanov. 2013. Phylogenetic analysis and reconfiguration of genera in the cestode order Diphyllidea. International Journal for Parasitology 43: 621-639. (6204) Download PDF |
| Redescription |
Caira, J. N., F. P. L. Marques, K. Jensen, R. Kuchta, and V. Ivanov. 2013. Phylogenetic analysis and reconfiguration of genera in the cestode order Diphyllidea. International Journal for Parasitology 43: 621-639. (6204) Download PDF |
| Scientific Name Notes |
Record Data
| Date (MM/DD/YYYY) | Action | User Name |
|---|---|---|
| 03/08/2016 | Created | J. Caira |
| 03/08/2016 | Modified | J. Caira |
| 08/23/2016 | Modified | R. Kuchta |
| 12/21/2021 | Modified | B. Barbeau |
Type Host
| Host Class | Chondrichthyes | ||||||
|---|---|---|---|---|---|---|---|
| Host Order | Myliobatiformes | ||||||
| Host Family | Myliobatidae | ||||||
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Type Host (Literal) |
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Type Host (Valid) |
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| Additional Host(s) | Myliobatis californica | ||||||
| Site in Host | spiral intestine | ||||||
| Host Notes |
Type Locality
| Country | México |
|---|---|
| Body of Water | Gulf of California |
| Island(s) | |
| City/Region | Bahia de Los Angeles |
| Coordinates | |
| DD Latitude | 28.916 |
| DD Longitude | -110.416 |
| Additional Localities | Puertecitos (30°21'N, 114°29'W), Santa Rosalia (27°19'N, 112°17'W), Loreto (26°01'N, 111°21'W), Gulf of California, Mexico |
| Locality Notes |
Specimens
| Type Material | CNHE No. 3343 (holotype), CNHE Nos. 3344-3345 (13 paratypes), USNPC Nos. 88220-88221 (12 paratypes), HWML Nos. 39912-39914 (12 paratypes) |
|---|---|
| Total Number of Type Specimens | 38 worms (28 mature, 10 immature) |
| Voucher Material | |
| Specimen Notes |
Data are given as in original description unless otherwise indicated.
FIGURES 1-10, 18. Echinobothrium mexicanum n sp. 1. Whole worm. 2. Scolex. 3. Detail of 1 dorsoventral group of apical hooks. 4. Detail of 1 group of lateral hooks. 5. Detail of peduncle spine. 6. Mature segment. 7. Cross section through segment at level indicated by arrow at 7 in Figure 6. 8. Cross section through segment at level indicated by arrow at 8 in figure 6. 9. Lateral view of terminal genitalia. 10. Eggs. 18. Summary of distribution of various microtriche forms on scolex. C, cirrus; CP, cephalic peduncle; CS, cirrus sac; DED, dorsal excretory duct; GP, genital pore; O, ovary; SP, scolex proper; T, testis; U, uterus; V, vitelline follicle; VA, vagina; VED, ventral excretory duct. 
Figures 11-17. Scanning electron micrographs of Echinobothrium mexicanum n. sp. 11. Scolex proper. 12. Three- and 4-digit palmate microtriches on anterior proximal bothridal surface. 13. Three-, 4-, and 5-digit palmate microtriches on proximal medial bothrial surface. 14. Slender spiniform and long, robust filiform microtriches (arrow) on distal bothrial surfaces. 15. Short filiform microtriches on medial distal bothrial surfaces. 16. Five- and 6-digit palmate microtriches on posterior proximal bothrial surface. 17. Lateral margin of bothria showing border between palmate and slender filiform microtriches. Scale bar in Figure 11. 50 µm. Scale bars in Figures 12-14, 16. 2 µm. Scale bar in Figure 15. 1 µm. 
From Caira et al 2013 (Cit# 6204). Fig. 1. Light micrographs showing diphyllidean scolex armature. (G) Apical organ armature of Halysioncum mexicanum; bracket indicates continues band of lateral hooklets. 
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