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Lamprocyrtis neoheteroporos Kling, 1973

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Two segmented forms with cephalis hemispherical to cylindrical, commonly open; with a stout three-bladed apical horn and usually one or more accessory spines; with circular to ellptical, irregularly arranged pores. Collar stricture indistinct. Thorax proximally conical, distally cylindical to slightly inflated; circular to elliptical or irregular pores, longitudinally aligned, increasing in size distally, becoming two or more times as large along a horizontal discontinuity as in L. heteroporos. Smaller pores may again appear near mouth. Although early specimens show a slight, gentle indentation of the wall at this discontinuity, there is no internal stricture or septal ring separating two segments. Mouth, sometimes sligthly constricted, surrounded by irregular row of small teeth; a weak peristome is seldom developed. Later specimens become smaller and more inflated.
Based on 15 specimens from 173-6-1 (108-110cm) and 173-4 (CC), maximum width 74-90µ, length from top of cephalis 100-130µ, proximal pore diameter 2-14µ, (average near upper value), distal pore diameter 6-28µ (average near upper value).
This species strongly resembles L. heteroporos, but lacks the distinct lumbar stricture of that species. The transition is gradual, the first apperance of the L. neoheteroporos morphotype defined when the last traces of an internal septal ring at the lumbar stricture disappears.
Kling 1973











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