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32 results for “Myzostomida”
FIGURE 3. Eenymeenymyzostoma nigrocorallium n in Taxonomic description and 3 D modelling of a new species of myzostomid (Annelida, Myzostomida) associated with black corals from Madagascar
FIGURE 3. Eenymeenymyzostoma nigrocorallium n. sp., internal structure. (A) Transverse section through a black coral infested by a myzostomid lying in the lumen of a digestive duct of the coral host. (B) Detail of the host epithelial structure under the myzostomid. (C) Parapodium fully retracted into epithelial folds, thus invisible externally. (D, E, F) Hermaphroditic gonads extending out to the body margins, with spermatozoids ready to fertilize oocytes inside the gonadal ducts. Scales: A, B: 200µm; C: 60µm; D: 100µm; E, F: 10µm. Abbreviations: ac, acicula; c, cuticle; d, dorsal side of myzostomid; e, epidermis; ec, ectoderma; ee, external environment, en: endoderma; gv, granular vesicles; lu, lumen of digestive tract; m, myzostomid; mc, myoepithelial cells; me, mesoglea; o, oocyte; s, coral skeleton; sg, spermatogonia; ss, skeletal spine; v, ventral side of myzostomid.
FIGURE 2. Eenymeenymyzostoma nigrocorallium n in Taxonomic description and 3 D modelling of a new species of myzostomid (Annelida, Myzostomida) associated with black corals from Madagascar
FIGURE 2. Eenymeenymyzostoma nigrocorallium n. sp. (A) SEM photo, dorsal view. (B) SEM photo, ventral view of partially folded specimen. (C) Detail of humps along margin in (B); three sets of about 10 humps each are present on each side. (D, E) Very small parapodia (not always visible), each with curved hook protruding from tip. (F) Light micrograph of parapodium digested in bleach to show entire hook apparatus. Scales: A, B: 1mm; C: 100µm; D, E: 10µm; F: 50µm. Abbreviations: ac, acicula; h, humps; ho, hook; m, mouth; ma, manubrium; mr, lateral margin; p, parapodium; pc, parapodial cone, ph, parapodial hook; rh, replacement hook.
FIGURE 1. Eenymeenymyzostoma nigrocorallium n in Taxonomic description and 3 D modelling of a new species of myzostomid (Annelida, Myzostomida) associated with black corals from Madagascar
FIGURE 1. Eenymeenymyzostoma nigrocorallium n. sp. and its antipatharian hosts. (A) View of a cluster of six reddish living specimens revealed by removing overlying coral tissue; myzostomids situated within the coral tissue are often invisible. (B) In places where there are no coral polyps, the presence of myzostomids can sometimes be detected as a slight swelling of the coral surface (red arrow). (C–E) Antipatharian species recorded herein as hosts of E. nigrocorallium: (C) Stichopathes sp.; (D) Cirrhipathes sp. aff. anguina; (E) Cirrhipathes sp. Scales: A, B: 1mm; C, D, E, F, G: 1cm/square.
FIGURE 9 in Myzostoma khanhkhoaensis (Myzostomida), a new myzostomid species from the Nhatrang Bay, Vietnam
FIGURE 9. Phylogenetic position of Myzostoma khanhkhoaensis sp. nov. The combined molecular data sets (CO1, 16S and 18S genes). Numbers above branches indicate posterior probabilities from Bayesian (BI), numbers below—bootstrap values from ML, conducted with RAxML using the GTR model of sequence evolution and a partition scheme, with 100 replication trials (0.03 bootstraping cutoff). GenBank sequences of Myzostomida are used in the analysis, Asteromyzostomum grygieri Summers & Rouse, 2014, Pulvinomyzostomum inaki Summers & Rouse in Summers, Al-Hakim & Rouse, 2014, P. messingi Summers & Rouse in Summers, Al-Hakim & Rouse, 2014and Endomyzostoma scotia Summers & Rouse, 2014 are included as outgroup.
FIGURE 8 in Myzostoma khanhkhoaensis (Myzostomida), a new myzostomid species from the Nhatrang Bay, Vietnam
FIGURE 8. Live Myzostoma khanhkhoaensis sp. nov. on the host's arm. (A) a group of myzostomes on oral side of the arm, (B) characteristic posture with body along pinnule and caudal process upwards; pinnules are inflated and deformed.
FIGURE 4 in Myzostoma khanhkhoaensis (Myzostomida), a new myzostomid species from the Nhatrang Bay, Vietnam
FIGURE 4. Myzostoma khanhkhoaensis sp. nov., parapodial hook apparatus (ZMMU WS11220, parapodium of the third pair). Abbreviations: h—hook, m—manubrium, rh—replacement hook; sr—support rod.
FIGURE 2 in Myzostoma khanhkhoaensis (Myzostomida), a new myzostomid species from the Nhatrang Bay, Vietnam
FIGURE 2. Live Myzostoma khanhkhoaensis sp. nov., general view. (A) lateral view, (B) dorsal view. Abbreviation: cp—caudal process. Arrowheads show caudal cirri.
FIGURE 3 in Myzostoma khanhkhoaensis (Myzostomida), a new myzostomid species from the Nhatrang Bay, Vietnam
FIGURE 3. Myzostoma khanhkhoaensis sp. nov., general scheme (based on the paratype ZMMU WS11205). (A) dorsal view, (B) ventral view. Abbreviations: cc—caudal cirri, cl—cloaca, cp—caudal process, mc—marginal cirri, lo—lateral organs, mmouth, pb—proboscis, pn—penis, pr—parapodia.
FIGURE 6 in Myzostoma khanhkhoaensis (Myzostomida), a new myzostomid species from the Nhatrang Bay, Vietnam
FIGURE 6. Live specimens of Clarkcomanthus albinotus (Comatulidae), the host of Myzostoma khanhkhoaensis sp. nov. (A) general view, (B) non-infected arm, (C) curved arm, infected by Myzostoma khanhkhoaensis sp. nov. Arrowhead shows the 'basket' with myzostomes.
FIGURE 5 in Myzostoma khanhkhoaensis (Myzostomida), a new myzostomid species from the Nhatrang Bay, Vietnam
FIGURE 5. Myzostoma khanhkhoaensis sp. nov. of different ages, SEM. (A) juvenile ZMMU WS11210–11223 without the caudal process as yet, ventral view, (B) young worm ZMMU WS11213 with short caudal process, ventral view, (C) adult specimen ZMMU WS11202, lateral view, (D) adult specimen ZMMU WS11214, ventral view. Abbreviations: lo—lateral organs, m—mouth, pn—penis. Arrowheads show caudal cirri, arrows show the anterior-posterior direction.
FIGURE 7 in Myzostoma khanhkhoaensis (Myzostomida), a new myzostomid species from the Nhatrang Bay, Vietnam
FIGURE 7. Clarkcomanthus albinotus ZMMU WS12421, deformation of the skeletal elements by Myzostoma khanhkhoaensis sp. nov., (A) pinnule of non-infected arm, (B) pinnule of infected arm from the same crinoid specimen.
FIGURE 1 in Myzostoma khanhkhoaensis (Myzostomida), a new myzostomid species from the Nhatrang Bay, Vietnam
FIGURE 1. Sampling location.
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