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Liriospyris globosa
Goll, 1968
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Description - Add description
LIRIOSPYRIS GLOBOSA n. sp. Goll 1968 p. 1427; pl. 176, fig. 1-3, 5
Diagnosis:
A species of Liriospyris characterized by a lattice shell that surrounds the front and back of the sagittal ring and three large lattice bars that are joined to the apex of the sagittal ring and parallel to the lateral axis.
Etymology:
The trivial name is derived from the Latin adjective globosus, meaning spherical.
Description:
Sagittal ring "D-shaped"; 67 to 75μ high; 43 to 63μ thick; joined directly to apex and base of lattice shell. Vertical spine short, projecting from approximate midpoint of sagittal ring; no sagittal-ring spines. Pair of connector bars projects from proximal end of vertical spine. Lattice shell 87 to 13μ wide; 93 to 130μ thick; surrounded front and back of the sagittal ring; not constricted sagittally and does not extend below base of sagittal ring; composed of lattice bars of two different sizes. Lattice bars massive, subcircular in cross section; outline subcircular lattice pores 6 to 23μ in diameter. Three broad lattice bars oriented parallel to the lateral axis are joined to apex of sagittal ring; in some specimens, these lattice bars frame two pairs of large sagittal-lattice pores. Basal ring joined to primary-lateral bars and front and back of sagittal ring; encloses four basal pores. In other specimens, areas occupied by these sagittal-lattice pores and basal pores are covered by lattice shell composed of narrow lattice bars; basal ring and primary-lateral bars are absent. No vertical, frontal, or sternal pores.
Remarks: Representatives of Liriospyris globosa n. sp. differ from those of L. oralis n. sp. in having three broad lattice bars that are joined to the apex of the sagittal ring and parallel to the lateral axis. Skeletons of L. globosa differ from those of L. mutuaria n. sp. and Tholospyris kantiana (Haeckel) in having a lattice shell that surrounds the front and back of the sagittal ring and from skeletons of L. reticulata in having no connector bars on the front of the sagittal ring. In specimens of the type-species of Liriospyris, L. clathrata, the lattice shell is joined directly to the front and back of the sagittal ring, and a sternal bar and sternal pore are present. Skeletons of i>L. globosa have no sternal bar or sternal pore. The connector bars that project from the back of the sagittal ring of skeletons of Liriospyris globosa are considered to be the homologues of the lattice bar that is joined to the sagittal ring at the proximal end of the vertical spine in specimens of Liriospyris mutuaria.
Occurrence:
Representatives of Liriospyris globosa are in all but two of the upper lower Miocene samples.
Holotype:
USNM 650377, from core sample AMPH~109P, 435-40 cm.
Picture: 1-3, 5—Liriospyris globosa Goll, n. sp. Back, basal, left-side, and apical views, respectively, of holotype. USNM 650377 ; core sample AMPH 109P, 435^40 cm. X300 | | Goll 1968 |
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