AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
Species | Ammothea hilgendorfi [WoRMS] | |
Authority | (Böhm, 1879) | |
Family | Ammotheidae | |
Order | Pantopoda | |
Class | Pycnogonida | |
Phylum | Arthropoda | |
Synonym (?) | ||
Sub-species level (?) | Not entered |
Native origin (?) | Ocean: Pacific --> Ocean region: NW Pacific Comments: Indo-Pacific |
Life form / Life stage (?) |
References (not structured): Le Roux, A., Gélinaud, G., Le Bail, Y., Monnat, J.-Y., Paraire, O., Ros, J., 2020. Occurrence of Ammothea hilgendorfi (Böhm), 1879) a pycnogonid from the north Pacific, in Etel river. An aod - les cahiers naturalistes de l’Observatoire marin 21–32. Comments: In Japan, A. hilgendorfi was reported as an ectoparasite on holothurids. |
Sociability / Life stage (?) |
References (not structured): Le Roux, A., Gélinaud, G., Le Bail, Y., Monnat, J.-Y., Paraire, O., Ros, J., 2020. Occurrence of Ammothea hilgendorfi (Böhm), 1879) a pycnogonid from the north Pacific, in Etel river. An aod - les cahiers naturalistes de l’Observatoire marin 21–32. Comments: Individuals may be found alone, but also in groups of 10 or more in little hollows at the rock surface or against reliefs formed by oyster shells or polychaete tubes. |
Reproductive frequency (?) | Not entered |
Reproductive type (?) | Sexual References: Barreto, F. S., Avise, J. C. 2008. Polygynandry and sexual size dimorphism in the sea spider Ammothea hilgendorfi (Pycnogonida: Ammotheidae), a marine arthropod with brood-carrying males. Molecular Ecology, 17(18), 4164-4175. Comments: Members of the class Pycnogonida are gonochoric and sexually dimorphic. During copulation, male usually suspends itself beneath the female. Fertilization occurs as the eggs leave the female's ovigers. Males brood the egg masses until they hatch. Life cycle: Eggs hatch into protonymphon larva then to adults. |
Developmental trait (?) | Brooding Parental care References: Barreto, F. S., Avise, J. C. 2008. Polygynandry and sexual size dimorphism in the sea spider Ammothea hilgendorfi (Pycnogonida: Ammotheidae), a marine arthropod with brood-carrying males. Molecular Ecology, 17(18), 4164-4175. |
Characteristic feeding method / Life stage (?) |
References (not structured): Le Roux, A., Gélinaud, G., Le Bail, Y., Monnat, J.-Y., Paraire, O., Ros, J., 2020. Occurrence of Ammothea hilgendorfi (Böhm), 1879) a pycnogonid from the north Pacific, in Etel river. An aod - les cahiers naturalistes de l’Observatoire marin 21–32. Comments: Pycnogonids are considered as predators or merely as parasites since their feeding may kill or leave their preys alive. Preys are potentially very diverse, consisting of a wide variety of invertebrate species from sponges to ascidians, but very often of cnidaria. |
Mobility / Life stage (?) |
References (not structured): Le Roux, A., Gélinaud, G., Le Bail, Y., Monnat, J.-Y., Paraire, O., Ros, J., 2020. Occurrence of Ammothea hilgendorfi (Böhm), 1879) a pycnogonid from the north Pacific, in Etel river. An aod - les cahiers naturalistes de l’Observatoire marin 21–32. Comments: A. hilgendorfi lives on sediment, mussel aggregations and seaweed. They can also be found on echinoderms (sea cucumbers and sea stars). |
Salinity tolerance range (?) | Unknown Comments: Not available. |
Habitat modifying ability potential (?) | Unknown Comments: Not available. |
Toxicity / Life stage (?) | Not relevant |
Bioaccumulation association (?) | Unknown Comments: Not available. |
Known human health impact? | Not known Comments: Not available. |
Known economic impact? | Not known Comments: Not available. |
Known measurable environmental impact? | Known References: Eno, N.C., Clark, R.A., Sanderson, W.G. 1997. Non-native marine species in British waters: a review and directory. Joint Nature Conservation Committee: Peterborough. ISBN 1-86107-442-5. pp. 152. Comments: It is not known whether the species has a negative ecological impact, however, there may be competition for food and space with other indigenous sea spiders or other fauna. |
Included in the Target Species list? | No References: HELCOM, 2009. Alien Species and Ballast Water [PDF]. Available at: (https://archive.iwlearn.net/helcom.fi/stc/files/shipping/Table_2_Alienspecies_%20lists_2009.pdf) |
Association with vessel vectors (?) | Biofouling References: Eno, N.C., Clark, R.A., Sanderson, W.G. 1997. Non-native marine species in British waters: a review and directory. Joint Nature Conservation Committee: Peterborough. ISBN 1-86107-442-5. pp. 152. |
Created by | Romualda Chuševė, 2011-11-03 |
Last update by | Sandra Gečaitė, 2024-08-01 |