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Family Textulariidae
Sub-family Textulariinae
Genus Haeuslerella, gen. nov.
Description.—Test in the early stages regularly biserial, becoming loosely biserial; aperture in the early stages textularian, becoming semicircular and sub-terminal in the adult chambers.
Observations.—This genus has been erected for the accommodation of the following species, which does not appear to conform with any known generic type. It is an isomorph of the genus Loxostomum. Its relationships are clearly with the Textulariidae, between the genera Textularia and Bigenerina, differing from both in having a number of loosely biserial chambers following the textularian series. The generic name is given in honour of the late Rudolf Haeusler, the Swiss worker on the foraminifera, who lived in New Zealand for the latter part of his life.
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Fig. 1—Lenticulina dicampyla (Franzenau). Side view. X 35.
Fig. 2—Ellipso-glandulina bensoni, nom. nov. a, side view; b, apertural view. X 35.
Fig. 3—Eponides umbonatus (Reuss). a, dorsal view; b, ventral view X 46.
Fig. 4—Cibicides pseudoungerianus (Cushman). a, dorsal view; b, ventral view; c, peripheral view. X 46.
Fig. 5—Ammodiscus finlayi, sp. nov. (holotype). a, side view; b, peripheral view. X 14.
Fig. 6—Cyclammina medwayensis, sp. nov. (holotype). a, side view; b, peripheral view. X 23.
Fig. 7—Haeuslerella pukeuriensis, gen. et sp. nov. (holotype). a, side view; b, edge view of last two chambers, showing position of aperture (marked A). X 35.
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Fig. 1—Gaudryina kingi, sp. nov. (holotype). a, front view; b, side view; c, apertural view X 23.
Fig. 2—Gaudryina medwayensis, sp. nov. (holotype). a, front view; b, side view, c, apertural view. X 23. (The apertural end is imperfect.)
Fig 3—Karreriella siphonella (Reuss). a, front view; b, side view of last-formed chamber showing aperture. X 23.
Fig. 4—Quinqueloculina costata d'Orbigny. a, b, opposite sides; c, apertural view. X 23.
Figs. 5, 6—Spiroloculina subaequalis, sp. nov. 5. (holotype). a, front view; b, side view. 6. Section through another specimen. All X 23.
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Haeuslerella pukeuriensis, sp. nov. Plate 19, figs. 7a, b.
Description.—Test elongate, composed of numerous chambers, early portion compressed, regularly biserial, remaining portion of test typically rounded in section, loosely biserial, with chambers nearly as high as broad, each chamber running further towards and finally reaching the other side of the shell; chambers in the early stages indistinct, later inflated and separated by deep sutures; wall finely arenaceous, rather smoothly finished; aperture in the early stages textularian, becoming semi-circular and sub-terminal in the adult chambers. Length up to 1.8 mm.
Holotype from Awamoan, Pukeuri, collected by Dr C. R. Laws.
This species is common in the washings from mudstone of the Medway River, but, as the specimens are not as well preserved as those from Pukeuri, the type specimen has been chosen from the latter locality, where this form is of frequent occurrence.