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10 results for “Tetrastemma”
Fig. 4. A in A Sponge-dwelling Ribbon Worm, Tetrastemma carneum sp. nov. (Nemertea: Monostilifera) Collected off Ofunato, Japan
Fig. 4. A maximum likelihood (ML) tree based on concatenated sequences of 16S (380 bp), COI (626 bp), 18S (1738 bp), 28S (505 bp), and H3 (329 bp). Solid circles indicate 100% of bootstrap values. Numbers near each node are support values generated by a separate partitioned ML bootstrap analysis with 1000 replicates.
Fig. 3 in A Sponge-dwelling Ribbon Worm, Tetrastemma carneum sp. nov. (Nemertea: Monostilifera) Collected off Ofunato, Japan
Fig. 3. Tetrastemma carneum sp. nov. (paratype), photomicrographs of transverse sections. A, Frontal organ (arrowhead); B, precerebral vessels (arrowheads); C, cerebral organs; D, brain; E, proboscis; F, posterior glands of cerebral ganglia; G, intestinal caeca; H, intestine; I, stylet apparatus. Abbreviations: ag, acidophilic glands; bg, basophilic glands; br, brain; co, cerebral organ; in, intestine; st, stomach. Scale bars: A–C, 100 µm; G, 50 µm; D–F, I, 75 µm; H, 150 µm.
Fig. 2 in A Sponge-dwelling Ribbon Worm, Tetrastemma carneum sp. nov. (Nemertea: Monostilifera) Collected off Ofunato, Japan
Fig. 2. Tetrastemma carneum sp. nov., photographs taken in life (type series). A, Whole body; B, magnification of head, dorsal; C, ventral. Abbreviations: acf, anterior cephalic furrow; pcf, posterior cephalic furrow; pp, proboscis pore. Scale bars: A, 2 mm; B, C, 500 µm.
Fig. 1. A in A Sponge-dwelling Ribbon Worm, Tetrastemma carneum sp. nov. (Nemertea: Monostilifera) Collected off Ofunato, Japan
Fig. 1. A collection site of Tetrastemma carneum sp. nov., off Ofunato, Iwate, Japan. A, Map showing the collection site of the specimens examined in the present study (red circle); B, demosponges from which specimens of T. carneum sp. nov. were found; C, magnification of demosponges—specimens of T. carneum were collected from a yellow demosponge attached to the bottom of a white demosponge (arrowhead).
FIGURE 1 in A histology-free description of a new species of the genus Tetrastemma (Nemertea: Hoplonemertea: Monostilifera) from Hawaii and India
FIGURE 1. Tetrastemma freyae sp. nov. (A, B) holotype: lateral view of the head with everted proboscis (A) and dorsal view of the anterior body (B). (C, F, G) paratype: dorsal view of the anterior body (C); stylet apparatus (F, G). (D, E) two specimens from India, dorsal view (E, squeezed specimen under cover glass). Scale bars: (A-C), 0.5 mm; (D, E), 1 mm; (F), 100 µm; (G), 50 µm.
Tetrastemma strandae sp. nov.
<p>Costa Rican deep-sea hoplonemertean, SIO-BIC N234</p> <p>Aligned cross sections of complete specimen (in 2 folders), serial sections, 5µm, Azan</p>
Tetrastemma sundbergi sp. nov.
<p>Costa Rican deep-sea hoplonemertean, SIO-BIC N256</p> <p>Aligned cross sections of complete specimen, serial sections, 5µm, Azan</p>
Figure 1 in Histology-free description and phylogenetics of Tetrastemma parallelos sp. nov. (Nemertea: Eumonostilifera) from Japan
Figure 1. Tetrastemma parallelos sp. nov., holotype ICHUM 8300: (a) anaesthetised specimen, dorsal view; (b) anaesthetised specimen, ventral view; (c) magnification of the head, squeezed specimen, dorsal view; (d) magnified stylet apparatus. Scale bars: a, b = 1 mm; c, d = 50 µm.
Figure 3 in Histology-free description and phylogenetics of Tetrastemma parallelos sp. nov. (Nemertea: Eumonostilifera) from Japan
Figure 3. Rooted Bayesian phylogenetic tree showing the position of Tetrastemma parallelos sp. nov. within the Tetrastemma Asian–Australian Pacific subclade (Chernyshev et al. 2021) based on concatenated sequences of five gene markers (16S, 18S, 28S, COI and H3). Numbers near each node indicate Bayesian posterior probability (PP)/RAxML maximum-likelihood bootstrap value (BS)/IQTree maximum-likelihood ultrafast bootstrap value (UFBoot). Solid circles indicate full support (1.00 PP/ 100% BS/100% UFBoot). Open circles indicate 1.00 PP.
Figure 2 in Histology-free description and phylogenetics of Tetrastemma parallelos sp. nov. (Nemertea: Eumonostilifera) from Japan
Figure 2. Conditions of the bottom surface where Tetrastemma parallelos sp. nov. was collected.
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