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Katroma sinetubus
Named by Carter.
Original description: Test with three or four chambers and a strong apical and antapical spine. Cephalis small, mostly imperforate with a strong triradiate horn; horn single on holotype (pl. KAT16, fig.1) but bifurcating on paratype (pl. KAT16, fig. 4). Thorax and abdomen trapezoidal in outline, usually with small polygonal pore frames, but pore frames sometimes larger. Final post-abdominal chamber strongly inflated composed of large pentagonal and hexagonal pore frames; pore frames reduced in size distally. Final post-abdominal chamber terminating in a short triradiate antapical spine; spine with sharp narrow ridges and wide, deep grooves.
Original remarks: Genus queried because Katroma, as described by Pessagno & Poisson (1981), has an inflated final chamber that terminates in a long open or closed tube. Katroma sinetubus n. sp. differs from all other described species of Katroma in that the distalmost abdominal chamber terminates in a strong antapical spine rather than a terminal tube.
Etymology: Latin, sine tubus without tube; noun.
| Year | Name and author |
|---|---|
| 2006 | Katroma sinetubus Gorican et al. p. 230 figs. Pl. KAT16 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.