Global Cestode DatabaseCestode Scientific Name
| Species ID | 12751 |
|---|---|
| Order | Diphyllidea |
| Family | |
| Subfamily | |
| Genus | Halysioncum |
| Species | megacanthum |
| Authority | (Ivanov & Campbell, 1998) Caira, Marques, Jensen, Kuchta & Ivanov, 2013 |
| Taxonomic Status | Valid |
| Valid Name | |
| Synonyms | |
| Genus Record | No |
| Type Species | No |
| Verified | No |
| Verified By | V. Ivanov, R. Kuchta |
| Citation(s) |
Ivanov, V. A. and R. A. Campbell. 1998. Echinobothrium megacanthum sp. n. (Cestoda: Diphyllidea) from the eagle ray Myliobatis goodei (Chondrichthyes: Rajoidei) from the Patagonian shelf of Argentina. Folia Parasitologica 45: 225-229. (522) 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 | |
| Scientific Name Notes |
Record Data
| Date (MM/DD/YYYY) | Action | User Name |
|---|---|---|
| 10/18/2013 | Created | B. Barbeau, V. Lopez |
| 08/20/2014 | Modified | |
| 02/03/2016 | Modified | K. Mojica |
| 03/23/2016 | Modified | B. Barbeau |
| 08/23/2016 | Modified | R. Kuchta |
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) | |||||||
| Site in Host | spiral intestine | ||||||
| Host Notes |
Type Locality
| Country | Argentina |
|---|---|
| Body of Water | San Matías Gulf |
| Island(s) | |
| City/Region | San Antonio Oeste |
| Coordinates | |
| DD Latitude | (40.44’S |
| DD Longitude | 64.56’W) |
| Additional Localities | |
| Locality Notes |
Specimens
| Type Material | MLP No. 3958 (holotype) IPCAS No.C-288 (paratypes) USNPC No. 87474 (paratypes) |
|---|---|
| Total Number of Type Specimens | based on 6 complete specimens and 7 fragmented specimens with scolices |
| Voucher Material | |
| Specimen Notes |
Data are given as in original description unless otherwise indicated.
Figs. 1-7. Echinobothrium megacanthum n. sp. Fig.1. Scolex. Fig. 2. Large apical hoks. Fig. 3. Detail of hooklets from lateral view of scolex. Fig.4. Spines on the cephalic peduncle. Fig. 5. Mature segment, ventral view. Fig. 6. Detail of terminal genitalia (holotype), lateral view, note partially everted cirrus. Fig. 7. Detail of cirrus spines. Abbreviations: esv= external seminal vesicle, isv= internal seminal vesicle, u= uterus, v= vagina. 
Figs. 8-14. Scanning electron micrographs of Echinobothrium megacanthum n. sp. Fig. 8. Scolex. Fig. 9. Edge of bothridium showing transition from filiform microtriches on distal surface (right) to palmate microtriches on proximal surface (left). Fig. 10. Filiform microtriches on distal surface of bothridia. Fig. 11. Meshlike branching filaments on anterior median region of bothridium, distal surface. Fig. 12. Bothridia showing views of roximal and distal surfaces. Fig. 13. Cephalic peduncle surface showing rows of spines. Fig. 14. Palmate microtriches on proximal surface of bothridium. Scale bars 100 µm (fig. 8), 10 µm (Figs. 9, 12, 13) and 1 µm (Figs. 10, 11, 14). 
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