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10 results for “Metaniidae”
FIGURE 8 in Adaptive morpho-traits, taxonomy and biogeography of Metania Gray, 1867 (Porifera: Spongillina: Metaniidae) with the description of a new species from Madagascar
FIGURE 8. Metania madagascariensis sp. nov. Holotype MSNG 57788 from the Matsiatra River. Gemmule architecture (SEM). A-B. Gemmule without gemmular cage; foramen with conical tubule and simple collar surrounded by distal tips of some rows of gemmuloscleres (B detail of A); C-D. Gemmule with gemmular cage of stout, smooth megascleres; foramen with simple collar surrounded by distal tips of gemmuloscleres (D detail of C); E-F. Gemmular surface covered by skeletal microscleres (spiny oxeas); microscleres on gemmular surface (F detail of E); G. gemmular theca with the fibrous pneumatic layer (cross section) and short foraminal tube; H. magnification of the trilayered gemmular theca with outer layer armed by gemmuloscleres distal tips, fibrous pneumatic layer with a monolayer of radially embedded tubelliform gemmuloscleres, and sublayered inner layer of compact spongin.
FIGURE 7 in Adaptive morpho-traits, taxonomy and biogeography of Metania Gray, 1867 (Porifera: Spongillina: Metaniidae) with the description of a new species from Madagascar
FIGURE 7. Metania madagascariensis sp. nov. Holotype MSNG 57788 from the Matsiatra River. A. Tubelliform (trumpetlike) gemmuloscleres; B. acanthoxea (microscleres) entirely ornamented by dense spines (LM). Megascleres are not represented.
FIGURE 3. A in Adaptive morpho-traits, taxonomy and biogeography of Metania Gray, 1867 (Porifera: Spongillina: Metaniidae) with the description of a new species from Madagascar
FIGURE 3. A. Map with first record of the genus Metania from Madagascar with type locality of Metania madagascariensis sp. nov. in the central Madagascan highland indicated by a black/white circle (21°25'36.1092"S, 47°9'23.7054"E); B-C. Different satellite magnifications of the type locality under a bridge of the River Matsiatra (Upper Basin of Mangoky River), crossing the Highway (R.N.) n°7 between Fianarantsoa (7.7 Km) and Ambalakely (1.5 Km) in the Haute-Matsiatra Region.
FIGURE 10 in Adaptive morpho-traits, taxonomy and biogeography of Metania Gray, 1867 (Porifera: Spongillina: Metaniidae) with the description of a new species from Madagascar
FIGURE 10. Schema of relevant morpho-traits divergences of gemmular theca architecture at the genus level in the family Metaniidae. Spatial arrangement of gemmuloscleres (left) and layers of the theca (right): 1) outer layer; 2) pneumatic layer; 3) inner layer. In Corvomeyenia the pneumatic layer is shifted from its usual position i.e. not in contact with the inner layer and overlapping the distal tips of the radially arranged birotules. In Metania and Acalle sharing the same trilayered gemmular architecture the pneumatic layer fill the entire space between radial gemmuloscleres (boletiform in Acalle vs. tubelliform in Metania); moreover the Acalle gemmules are ornate by supplementary pseudobirotules in the outer layer. In Houssayella and Drulia the pneumatic layer is lost. The gemmuloscleres of Houssayella (Trochospongilla-like birotules) are radially embedded in the two resting theca layers. The single-rotule gemmuloscleres (parmuliform) of Drulia are laid directly on the gemmular surface or pluristratified and embedded in the two resting layers of the theca. Not to scale.
FIGURE 9 in Adaptive morpho-traits, taxonomy and biogeography of Metania Gray, 1867 (Porifera: Spongillina: Metaniidae) with the description of a new species from Madagascar
FIGURE 9. Hypothesized evolutionary trend of gemmuloscleres in four genera of the Metaniidae family: pseudobirotules (left) to tubelliform, boletiform (middle) and parmuliform (right) (modified from Volkmer-Ribeiro, 1986).
FIGURE 2 in Adaptive morpho-traits, taxonomy and biogeography of Metania Gray, 1867 (Porifera: Spongillina: Metaniidae) with the description of a new species from Madagascar
FIGURE 2. Genus Metania. Spicular complements of the 11 hitherto accepted Metania species plus the new species M. madagascariensis sp. nov.(modified in part from Volkmer-Ribeiro, 1979, 1986; Volkmer-Ribeiro & Costa, 1992, 1993).
FIGURE 1 in Adaptive morpho-traits, taxonomy and biogeography of Metania Gray, 1867 (Porifera: Spongillina: Metaniidae) with the description of a new species from Madagascar
FIGURE 1. Worldwide geographic range of the genus Metania suggesting a Gondwanan biogeographic pattern with all circumtropical-equatorial records in the Neotropical, Afrotropical, Oriental, and Australian Regions. Each dot refers to one or more species.
FIGURE 6 in Adaptive morpho-traits, taxonomy and biogeography of Metania Gray, 1867 (Porifera: Spongillina: Metaniidae) with the description of a new species from Madagascar
FIGURE 6. Metania madagascariensis sp. nov. Spicular complement (SEM micrographs) of the four studied specimens.
FIGURE 5 in Adaptive morpho-traits, taxonomy and biogeography of Metania Gray, 1867 (Porifera: Spongillina: Metaniidae) with the description of a new species from Madagascar
FIGURE 5. Metania madagascariensis sp. nov. Holotype MSNG 57788 from the Matsiatra River. Body architecture (SEM micrographs). A. Sponge surface (ectosome) with conules and apertures of the aquiferous system in the dermal membrane (ectosomal skeleton, top view); B. Spiny microscleres (detail of A); C. Dermal membrane strongly armed by tangential spiny microscleres (ectosomal skeleton, detail of A); D. Skeletal architecture of the ectosomal and choanosomal skeleton (cross section); E. Skeleton of stout oxeas in an irregular network of mono- to pauci-spicular tracts; F. Ascending spicular fibre supporting a conule at the sponge surface; G. Meshes of choanosomal skeleton with pauci- to multi-spicular tracts of megascleres, and scattered microscleres; H. Dense assemblages of microscleres in choanosomal skeleton; I. Basal spongin plate well developed, tangentially armed by megascleres as stout, smooth oxeas and by microscleres as spiny oxeas.
FIGURE 4 in Adaptive morpho-traits, taxonomy and biogeography of Metania Gray, 1867 (Porifera: Spongillina: Metaniidae) with the description of a new species from Madagascar
FIGURE 4. Metania madagascariensis sp. nov. A. Paratype and Holotype MSNG 57788 in dry condition as small spiny cushions on a boulder; B. Type locality along the River Matsiatra.
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