N15

Lophospyris pentagona pentagona (Ehrenberg) emend. Goll

Ceratospyris pentagona Ehrenberg, 1872a, p. 303; 1872b, pl. 15, fig. 15

Ceratospyris polygona Benson, 1966, p. 321, pl. 22, figs. 15, 16 (partim.)

Ceratospyris sp., Nigrini, 1967, p. 48, pl. 5, fig. 6

Dorcadospyris pentagona (Ehrenberg), Goll, 1969, p. 338, pl. 59, figs. 1-3, 5 (not 8-10, 12); Goll, 1972, p. 964, pl. 58, figs. 1-3, pl. 88

Lophospyris pentagona pentagona (Ehrenberg), Goll, 1977, p. 398, pl. 10, figs. 1-7, pl. 11, figs. 1-3, 5

DESCRIPTION AND DIMENSIONS

"Sagittal ring polygonal; 54 to 90 microns high; 28-67 microns thick; joined to front, apex, and back of the lattice shell. Apical and frontal spines of variable length; vertical spine very short; no axial spine. Primary-lateral bars joined to basal ring; no other connector bars.

"Basal ring polygonal; 43 to 85 microns wide; 28 to 60 microns thick; joined directly to front and back of sagittal ring; encloses four basal pores. Basal ring, lattice bars, lattice spines, and basal spines tribladed in cross section, having blades arranged like the letter T. Six lattice bars, arranged in three symmetrical pairs, are joined to basal ring at points of angularity; two pairs of lattice bars in front of primary-lateral bars; one pair of lattice bars in back of primary-lateral bars. Nine basal spines, 6 to 58 microns long, project from basal ring. Frontal spine is shortest basal spine. Remaining basal spines arranged in four symmetrical pairs of approximately equal length; one basal spine is adjacent to each of the lattice bars and primary-lateral bars that are joined to basal ring. Two of the three blades of basal spines are parallel to basal ring; whereas the third perpendicular blade is on the exterior of basal spines adjacent to lattice bars and on the interior of basal spines adjacent to sagittal ring and primary-lateral bars. Lattice shell 78 to 155 microns wide; slightly constricted sagittally; does not extend below basal ring; perforated by subcircular to subpolygonal lattice pores 4 to 30 microns in diameter. Four lattice bars joined to sagittal ring; one junction at proximal end of apical spine; one junction between apical and frontal spines; two junctions between apical and vertical spines. Lattice spines, 4 to 32 microns long, project from junctions of lattice bars. Five pairs of sagittal-lattice pores; no vertical, frontal, or sternal pores." (from Goll, 1969).

REMARKS

1. "...Specimens assignable to this species demonstrate a substantial size range. Small individuals... are polygonal in outline and overlap the size range of Lophospyris pentagona quadriforis [see Goll, 1977, p. 398]... Large individuals... are inflated and subspherical in outline." (from Goll, 1977).

Plate 19, figure 5

N16

RECENT DISTRIBUTION

1. Benson, 1966 (Ceratospyris polygona); "... cosmopolitan in the Gulf [of California] but rare at all stations where it occurs except 115 where it is common (2.6%). It has a greater frequency in the axial portion of the Gulf and does not appear to respond to upwelling..."

2. Nigrini, 1967, fig. 25; "Indian Ocean occurrences - C. sp. is sparsely distributed in the western tropics, but forms up to 6 percent of the described population in the eastern tropics. The species is practically absent from middle latitudes."

3. Goll, 1977; "... panoceanic, warm cosmopolitan subspecies..."