1889 193,702 Phoronopsis harmeri Pixell, 1912 283,821 Nemertea Malacobdella
grossa in Pitar morrhuana and Mercenaria campechiensis.
Malacobdella grossa 1 was short and domains were not identified, but 6 other sequences, with a top hit of a TLR gene, lacked either the TIP domain (Leptochiton rugatus 1), a LRR domain (Proneomenia custodiens 1, Laqueus californicus 2, and Priapulus sp.
In contrast, neither entoproct transcriptome produced clear TLR homologs, and the nemertean Malacobdella grossa produced only one questionable hit.
ABSTRACT Results of the histopathological study of mantle tissues of the commercial geoduck Panopea abbreviata hosting the nemertean Malacobdella arrokeana revealed that the normal histology of mantle tissues of the bivalve was not altered by the attachment structure of the nemertean, even when the maximum individuals per clam reached 191 nemerteans.
KEY WORDS: nemertean, Malacobdella arrokeana, Panopea abbreviata, entocommensalism, geoduck, Panopea
The family Malacobdellidae comprises a single genus, Malacobdella, with 6 species inhabiting the mantle cavity of bivalves (Jensen & Sadeghian 2005).
Malacobdella arrokeana Ivanov, Bigatti, Penchaszadeh & Norenburg, 2002 (Nemertea: Bdellonemertea) inhabit the mantle cavity of the geoduck Panopea abbreviata Valenciennes, 1839 (Ivanov et al.
Immediately after the measurements, animals were dissected, and examined for the presence of the parasitic Nemertean worm, Malacobdella grossa.
grossa: frequency of occurrence of infestation with Nemertean Malacobdella grossa.
Likewise, Hammarsten (1918) identified two transitory anterolateral epidermal invaginations as rudiments of cerebral organs in the development of Malacobdella
grossa, a highly modified hoplonemertean that is a commensal in the mantle cavity of bivalve molluscs, which lacks cerebral organs as an adult.
The spermatozoon of the nemertine Malacobdella