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12 results for “Adeonella”
Fig. 20. A–E. Adeonella pallasii. A in Northern Adriatic Bryozoa From The Vicinity Of Rovinj, Croatia
Fig. 20. A–E. Adeonella pallasii. A. General aspect (lectotype, UIIZ 169; 1 mm). B. Untreated autozooids (lectotype, UIIZ 169; 0.2 mm). C. Ontogenetically young autozooids at branch tip (AMNH 934; 0.1 mm). D. Autozooidal orifice (AMNH 935; 0.05 mm). E. Autozooid (AMNH 936; 0.1 mm). F–H. Escharoides mamillata (AMNH 895). F. General aspect (0.2 mm). G. Autozooid (0.1 mm). H. Maternal zooid with ovicell, flanked by two avicularia (0.1 mm).
FIGURE 7. A–E. Adeonella assegai n in Novel taxa of Cheilostomata Bryozoa discovered in the historical backlogs of the Iziko South African Museum
FIGURE 7. A–E. Adeonella assegai n. sp. (SAMC-A028960) A. Autozooids at the growing edge (scale bar = 0.2 mm, magnified x75). B. Frontal view of autozooids near the margin (scale bar = 0.2 mm, magnified x75). C. Close-up of two zooids (scale bar = 0.2 mm, magnified x100). D. Close-up of the secondary orifice, paired frontal avicularia and spiramen (scale bar = 0.1 mm, magnified x200). E. Dimorphic brooding zooids at the branch margin (scale bar = 0.4 mm, magnified x50).
Figure 9 in The genus Adeonella (Bryozoa, Ascophora) in the Mediterranean, with description of two new living species and rediscovery of a fossil one
Figure 9. Adeonella pozarae sp. nov. Holotype (A, C, E, G, I–M) and Paratype (B, D, F, H): off Lastovo Island (Vrhovine), Adriatic Sea, Recent. (A) The holotype. Scale bar: 500 µm. (B) The paratype. Scale bar: 500 µm. (C) Growing tip from the holotype with developing zooidal walls. Scale bar: 200 µm. (D) Cross-section of the paratype with evident layers of primary and secondary calcification in the frontal walls. Scale bar: 100 µm. (E) A zooid from the holotype. Scale bar: 200 µm. (F) Primary orifice. Scale bar: 100 µm. (G) Primary orifice with the operculum. Scale bar: 100 µm (H) Orifice of a proximal zooid from the paratype being occluded by proceeding calcification. Scale bar: 100 µm. (I) Secondary orifice with paired peristomial avicularia. Scale bar: 100 µm. (L) Secondary orifice with a single peristomial avicularium. Scale bar: 100 µm. (M) Deatail of an avicularium. Scale bar: 50 µm.
Figure 10 in The genus Adeonella (Bryozoa, Ascophora) in the Mediterranean, with description of two new living species and rediscovery of a fossil one
Figure 10. Adeonella flabellata sp. nov. Holotype. Mana 20–40 m, Adriatic Sea. Recent. (A) Zooid from near the growing edge. Note the absence of avicularia and the similar secondary orifice and ascopore. Scale bar: 200 µm. (B) Primary orifice with straight proximal border with large U-shaped sinus. Scale bar: 50 µm. (C) Some diamond-shaped zooids with developing frontal tubercles. Scale bar: 200 µm. (D) Zooids from the growing margin, one with peristomial wings converging to form the orificial bridge. Scale bar: 200 µm. (E) Lateral margin of the main colony blade, formed by large zooids, less rhomboidal than the others. Scale bar: 500 µm. (F) Zooids from the margin of a narrow notch in the colony blade. Note the small proximalinward directed avicularia associated with the peristomial bridge. Scale bar: 200 µm. (G) Basal portion of the colony showing the downward increase in secondary calcification and the formation of small prominent frontal avicularia on marginal zooids. Scale bar: 500 µm. (H) Colony margin with kenozooids filling interzooidal spaces. Scale bar: 500 µm.
Figure 7 in The genus Adeonella (Bryozoa, Ascophora) in the Mediterranean, with description of two new living species and rediscovery of a fossil one
Figure 7. Adeonella pallasii (Heller, 1867). Fossil specimens from southern Italy. (A) Heavy mineralised fragment from Fiumefreddo (north-east Sicily). Scale bar: 500 µm. (B) Detail of the same fragment. Note the lateral position of the peristomial avicularia on zooids. Scale bar: 500 µm. (C,D) A well-preserved specimen from Benestare (Calabre). (C) Some zooids showing tubercles and rounded cicatrices of sporadic frontal avicularia. Scale bar: 500 µm. (D) Closeup of a zooid with peristomial avicularia slightly inclined toward the orifice. Scale bar: 500 µm.
Figure 8 in The genus Adeonella (Bryozoa, Ascophora) in the Mediterranean, with description of two new living species and rediscovery of a fossil one
Figure 8. Adeonella adae (Neviani, 1891). (A) Original fig. 8 from the paper of Neviani (1891). (B–D) Furnari, Early Pleistocene. (B) Fragment of a presumed juvenile branch. Scale bar: 500 µm. (C) Detail of the proximal part of (B) showing elongated, distally directed avicularia on all zooids except those from the marginal rows. Scale bar: 500 µm. (D) A single zooid with a slightly spatulate frontal avicularium. Note the narrow U-shaped sinus visible through the spiramen. Scale bar: 200 µm. (E,F) Monte dell'Apa, Early Pleistocene. (E) Fragment of the presumed proximal portion of a colony, just before its bifurcation. Orifices and large proximal avicularia are locally obliterated by secondary calcification and small variably located avicularia develop. Scale bar: 500 µm. (F) Close-up of some zooids in (E), some with small frontal avicularia, resulting from the regeneration of larger ones. Scale bar: 200 µm.
Figure 5 in The genus Adeonella (Bryozoa, Ascophora) in the Mediterranean, with description of two new living species and rediscovery of a fossil one
Figure 5. Adeonella pallasii (Heller, 1867). (A–E) Different aspects from the same branch. Off Prvić, 20 m depth. (A) Young portion. Note the different shape and size of zooids in the lateral rows. Scale bar: 500 µm. (B) Old portion with less differentiated and more diamond-shaped zooids. Scale bar: 1 mm. (C) Lateral view showing the zooids forming the margin of the branch with their usually paired, inclined peristomial avicularia. Scale bar: 1 mm. (D) Young zooids, detail of (A). Note the prominence of frontal knobs. Scale bar: 500 µm. (E) Old zooids, detail of (B). Scale bar: 500 µm. (F) Zooids with deepened secondary orifices and spiramina due to secondary calcification. Frontal avicularia appear on some zooids. Apulian shelf, 80–100 m. Scale bar: 500 µm. (G,H) From Jabuka Shoal, 32 m depth. (G) Branching point with an axillary kenozooid. Scale bar: 500 µm. (H) Growing tip with newly budded zooids and their primary orifices rapidly hidden by the overgrowing peristomial bridges. Scale bar: 500 µm. (I) Primary orifice. Scale bar: 50 µm. (L) Detail of the sinus. Scale bar: 20 µm.
Figure 6 in The genus Adeonella (Bryozoa, Ascophora) in the Mediterranean, with description of two new living species and rediscovery of a fossil one
Figure 6. Adeonella pallasii (Heller, 1867). (A–C) Proximal part of a slender twisted branch from anAdriatic population (Lastovo, 20–30 m), Recent. (A) Single frontal avicularia are present only on some zooids of the marginal rows. Scale bar: 500 µm. (B) View of an area slightly proximalthan in (A), with frontal avicularia on several zooids. Scale bar: 500 µm. (C) A more proximal part with frontal calcification occluding nearly all orifices and spiramina leaving only visible the small frontal avicularia. Scale bar: 500 µm. (D,E) Living specimen from the Strait of Scarpanto (Aegean Sea), 29–33 m. (D) Some zooids with up to three frontal avicularia. Note also the development of frontal tubercles. Scale bar: 500 µm. (E) Bifurcation showing a concentration of frontal raised avicularia at the branching point. Scale bar: 500 µm. (F) Dead specimen from
Figure 1 in The genus Adeonella (Bryozoa, Ascophora) in the Mediterranean, with description of two new living species and rediscovery of a fossil one
Figure 1. Colony morphology of some Adeonella species from the Mediterranean area. (A–C) Adeonella calveti from an overhang, off Acitrezza, about 40 m: basal (A) and top (B) views of the same colony, formed by a set of contiguous fans, each consisting of branches dichotomizing in the same plane. (C) Detail: note how anastomoses are avoided through changes in the growth direction of branches and their tilting and twisting. (D) Adeonella calveti: a colony from the roof of Galatea cave near Alghero, north-west Sardinia, 7 m. (E) Adeonella pallasii: an almost complete (?) colony from coralligenous bottoms of Prvić Island, about 10 m. (F,G) Adeonella flabellata: the unique colony consisting of a stalk-like proximal part and distal enlarged blades. Coralligenous bottoms from Mana, 20–40 m. Scale bar: 1 mm for all figures.
Figure 3 in The genus Adeonella (Bryozoa, Ascophora) in the Mediterranean, with description of two new living species and rediscovery of a fossil one
Figure 3. Adeonella calveti Canu and Bassler, 1930. All figures from the same colony, from an overhang, off Acitrezza (near the Ciclopi Islands), about 40 m. (A) Some zooids from a newly formed branch, just behind the growing tip. Note the morphology and the distribution of frontal avicularia. Scale bar: 500 µm. (B) Detail of (A) to show the drop-shaped notch left by the convergent growth of the proximal peristomial wings. Scale bar: 50 µm. (C) The primary orifice covered by the operculum. Scale bar: 20 µm. (D) A colony branch showing dimorphic diamond-shaped central zooids and subrectangular marginal zooids. Scale bar: 1 mm. (E) Young zooids with protruding peristomes and transversely elliptical secondary orifices. Scale bar: 200 µm. (F) Zooids from the branch sides with their subtriangular avicularia located lateral to the spiramen, medially and distally directed. Scale bar: 500 µm. (G) Developing zooids from the growing tip. Note the early
Figure 4 in The genus Adeonella (Bryozoa, Ascophora) in the Mediterranean, with description of two new living species and rediscovery of a fossil one
Figure 4. Distribution maps of the studied species. (A) Distribution of Adeonella calveti: open circles: living populations and dead submarine specimens; solid circles: fossil populations. (B) Distribution of Adeonella pallasii: open squares: living and partly dead populations; crossed squares: exclusively dead populations: solid squares: fossil populations. (C) Distribution of: Adeonella adae (stars), Adeonella pozarae (dented open circle) and Adeonella flabellata (composite rhombus).
Figure 2 in The genus Adeonella (Bryozoa, Ascophora) in the Mediterranean, with description of two new living species and rediscovery of a fossil one
Figure 2. Adeonella calveti Canu and Bassler, 1930. Lectotype: PNHM: BP-A73_01. (A) The entire colony fragment. Scale bar: 5 mm. (B) One lectotype branch. Scale bar: 500 µm. (C) A zooid from a subperipheral row with the typical elongate avicularia. Scale bar: 100 µm. (D) Group of zooid with proximal avicularia. Scale bar: 200 µm.
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