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11 results for “Monticuliporidae”
FIG. 8 in New Monticuliporidae (Bryozoa, Trepostomata) from the Cystoid Limestone Formation (Upper Ordovician) of the Iberian Chains (NE Spain)
FIG. 8. — Monticuliporidae sp. indet., MPZ 2006/110: A, longitudinal thin section showing the large acanthostyles (ac), the peculiar cystiphragms (cy), and the narrow mesozooecia (mz); B, tangential thin section showing the regular hexagonal autozooecia (az) with wall sections having gently beaded (bd) outline, the mesozooecia (mz) in an area where hexagonal autozooecia are not so regular, and large acanthostyles (ac); C, a high-magnification detail of the longitudinal section of an acanthostyle (ac) showing the central lumen on the lower part of the figure and lamination around the lumen; D, a high-magnification detail of the cross section of an acanthostyle (ac) showing the light coloured central lumen (lu) and surrounding dark lamina. Scale bars: A, B, 1 mm; C, D, 0.1 mm.
FIG. 1 in New Monticuliporidae (Bryozoa, Trepostomata) from the Cystoid Limestone Formation (Upper Ordovician) of the Iberian Chains (NE Spain)
FIG. 1. — Outcrops of Ordovician rocks in the Eastern Iberian Chain and their location in the Iberian Peninsula. The lower rectangle marks the location of the study area and measured sections. 1, Valdelaparra; 2, La Peña del Tormo.
FIG. 4. — Monticulipora cystiphragmata n in New Monticuliporidae (Bryozoa, Trepostomata) from the Cystoid Limestone Formation (Upper Ordovician) of the Iberian Chains (NE Spain)
FIG. 4. — Monticulipora cystiphragmata n. sp., schematic tangential section of the holotype (MPZ 2006/134). It shows the disposition of the square- and triangular-shaped mesozooecia (mz), the location of acanthostyles (ac), and the autozooecial aperture shape (az). Scale bar: 0.1 mm.
FIG. 3. — A-D, Monticulipora cystiphragmata n in New Monticuliporidae (Bryozoa, Trepostomata) from the Cystoid Limestone Formation (Upper Ordovician) of the Iberian Chains (NE Spain)
FIG. 3. — A-D, Monticulipora cystiphragmata n. sp.; A, C, longitudinal thin sections of the holotype (MPZ 2006/134) and paratype (MPZ 2006/132),respectively,showing the autozooecia (az), the large cystiphragms (cy) joined in some cases to the opposite wall by diaphragms (dp), and the narrow mesozooecia (mz); B, D, tangential thin sections of the holotype and the same paratype as in C showing square and triangular mesozooecia (mz) in B, and the cystiphragms (cy) cross sections inside autozooecial (az) sections in D; E, F, Monticulipora kolaluensis Jaroshinskaja,1962, MPZ 2006/109; E, longitudinal thin section showing the stylolitic contact with another monticuliporid bryozoan; F, tangential thin section showing the macular autozooecia (maz), the mesozooecia (mz), the acanthostyles (ac) in the common vertex of three autozooecia, and a cross section of a cystiphragm (cy) inside an autozooecial (az) section. Scale bars: 1 mm.
FIG. 2 in New Monticuliporidae (Bryozoa, Trepostomata) from the Cystoid Limestone Formation (Upper Ordovician) of the Iberian Chains (NE Spain)
FIG. 2. — Stratigraphic columns of the Cystoid Limestone Formation: A, Valdelaparra section; B, La Peña del Tormo section. The horizons where bryozoans were collected are marked with a double head arrow in A and with an asterisk in B. Scale bars: A, 10 m; B, 1 m.
FIG. 7. — Prasopora spjeldnaesi n in New Monticuliporidae (Bryozoa, Trepostomata) from the Cystoid Limestone Formation (Upper Ordovician) of the Iberian Chains (NE Spain)
FIG. 7. — Prasopora spjeldnaesi n. sp., schematic longitudinal section showing the shape and distribution of autozooecial (az) cystiphragms (cy) and diaphragms (dp) and a group of densely tabulate mesozooecia (mz) with diaphragms at the same level. In 1 a large mesozooecium divides to form two smaller mesozooecia. Scale bar: 1 mm.
FIG. 5. — A, B in New Monticuliporidae (Bryozoa, Trepostomata) from the Cystoid Limestone Formation (Upper Ordovician) of the Iberian Chains (NE Spain)
FIG. 5. — A, B, Monticulipora kolaluensis Jaroshinskaja, 1962, MPZ 2006/109, longitudinal thin sections; A, area of the zoarium with large cystiphragms (cy) attached to one side of the autozooecial (az) wall that are joined to the opposite wall by diaphragms (dp); B, an area with smaller cystiphragms (cy) located in both sides of the wall as single rows or isolated; C-E, Prasopora carnica Vinassa de Regny, 1915, MPZ 2006/113; C, longitudinal thin section showing the autozooecia (az), the cystiphragms (cy), and the mesozooecia (mz); D, E, two tangential thin sections separated by less than 3 mm and in the same depth of the colony; D, the autozooecia (az) are completely surrounded by mesozooecia (mz); E, the autozooecia (az) are in contact with other autozooecia in most part of their outline, having two cystiphragms (cy) inside, and scarce mesozooecia (mz); F, Prasopora spjeldnaesi n. sp., MPZ 2006/99, basal surface showing the concentrically wrinkled base and the initial point of growth of the zoarium (ipg). Scale bars: 1 mm.
FIG. 10 in New Monticuliporidae (Bryozoa, Trepostomata) from the Cystoid Limestone Formation (Upper Ordovician) of the Iberian Chains (NE Spain)
FIG. 10.— Monticuliporidae sp. indet.,schematic longitudinal section showing a prominent acanthostyle (ac), the shape of diaphragms (dp), cystiphragms (cy) and autozooecial tubes (az), as well as the narrow mesozooecia (mz). Scale bar: 0.1 mm.
FIG. 6. — Prasopora spjeldnaesi n in New Monticuliporidae (Bryozoa, Trepostomata) from the Cystoid Limestone Formation (Upper Ordovician) of the Iberian Chains (NE Spain)
FIG. 6. — Prasopora spjeldnaesi n. sp., holotype (MPZ 2006/99): A, general view of the colony; B, surface of the colony showing autozooecia (az) completely surrounded by mesozooecia (mz), and a cross section of a cystiphragm (cy) inside an autozooecial aperture; C, tangential thin section with abundant mesozooecia (mz) completely isolating autozooecia (az); D, longitudinal thin section showing the autozooecia (az) and mesozooecia (mz) as well as the peculiar cystiphragms (cy); E, a group of mesozooecia (mz) with their diaphragms (dp) at the same level forming a square network. Scale bars: 1 mm.
Data from: Cladistic analysis of the Paleozoic bryozoan family Monticuliporidae and Mesotrypidae
A set of 127 binary and multistate characters, weighted by the number of derived character states, degree of covariation, and level of homoplasy, was used in a cladistic analysis of type species representing12 genera previously assigned to families Monticuliporidae and Mesotrypidae. The most parsimonious tree consisted of a 10-genus monophyletic crown group with the remaining two genera forming a basal paraphyletic stem group. The composition of the monticuliporid crown group is broadly similar to two earlier classifications (Astrova 1978; Marintsch 1998) while stem group membership matches that of Astrova's (1965, 1978) family Mesotrypidae. Phenetic groupings, based on overall morphological similarity, have memberships that are similar to those of clades but provide no means of determining the polarity of evolutionary relationships either within or between them. Finally, only the observed stratigraphic ranges of the type species of genera provide a statistically significant match with cladistic branching sequence, perhaps because current composite generic ranges reflect the mixing of species belonging to different genera. Based on cladogram topology, we propose the placement of all 12 genera into a single family Monticuliporidae.
Data from: Cladistic analysis of the Paleozoic bryozoan family Monticuliporidae and Mesotrypidae
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