A new Architectonica from the Philippines (Mollusca, Gastropoda, Architectonicidae) Axel Alf & Kurt Kreipl Alf, A. & K. Kreipl (2001): A new Architectonica from the Philippines (Mollusca, Gastropoda, Architectonicidae). -Spixiana 24/2: 103-106 A species of the genus Architectonica Röding, 1798 from the southern Philippines is described as new. Architectonia proestleri, spec. nov. is relatively small for the genus and lives in deep water. The species is characterized by the presence of a central midrib on the body whorl and a multi-ribbed base. Prof. Dr. Axel Alf, University of Applied Sciences Weihenstephan, D-91746 Triesdorf, Germany. E-mail:
[email protected] Kurt Kreipl, Meeresmuseum Öhringen, Höhenweg 6, D-74613 Öhringen, Ger-many. E-mail:
[email protected] Introduction In Summer 2000 local people started dredging at Aliguay Island, Mindanao, Phlippines. During these dredgings a species of Architectonica was brought up which is similar to Architectonica consobrina Bieler, 1993, but differs in some characteristic features. Therefore it is described here as new. Architectonica proestleri, spec. nov. Figs 1-3 Description (in this description the abbreviations for the sculptural elements used by Bieler (1993) are taken for better comparison, see also figure No. 1). Shell thin, light of weight. Diameter of Protoconch 1.18-1.23 mm. Teleoconch of medium to small size, diameter 12-26 mm (5.0-6.25 whorls). Moderately depressed cone shaped with whorls equally inflated on upper side and base. Umbilicus moderately wide (about 30 % of shell diameter). Sculpture of upper side. Subsutural rib (SSR) strong and distinctly separated. Mid rib area divided in three spiral ribs of which the upper mid rib (UMR) and the central mid rib (CMR) usually are broader than the lower mid rib (LMR). The spaces between the SSR, the UMR, the CMR and the LMR are about equal and about 50 % of the broadth of the ribs. Upper peripheral rib (UPR) and lower peripheral rib (LPR) prominent but narrower; of about equal size. Grooves between LMR, UPR and LPR equal and broader than these between the mid ribs. Upper part of whorl attachment on upper part of lower peripheral rib (LPR), upper edge of IPR visible in suture. Upper side of shell and periphery crossed by deeply incised oblique axial grooves which become smooth on body whorl, segments of the mid ribs more or less corresponding. The sculpture is completely expressed after 0.5 to 1 teleoconch whorls. Base. Infraperipheral rib (IPR) strong but narrow with one more or less fine additional spiral rib between LPR and IPR. Base with or without 1 to 3 weak spiral ribs near the umbilicus and distinct equal axial Striae which faden towards the periphery. Proxumbilical rib (PUR) narrow but strong; separated from base by a wide gap. Nodose rib surrounding umbilicus (UC) large and regulär. Columellar wall 103
Specimen codes extracted from OCR text.
BioStor
