. Bulletin of the British Museum (Natural History), Geology. 2 mm. mm Fig. 30 Propterus elongatus Wagner. A, scattered dorsal basal fulcra of caudal fin, as preserved in B, caudal fin squamation restored from , axial lobe shaded. poorly known, since no specimens were available for preparation in acetic acid. However, this fish closely resembles P. elongatus in its form, proportions and squamation, and the available evidence indicates that their skulls were very similar as well. Description, (i) General features. P. microstomus rarely exceeds 75 mm in standard length. It
. Bulletin of the British Museum (Natural History), Geology. 2 mm. mm Fig. 30 Propterus elongatus Wagner. A, scattered dorsal basal fulcra of caudal fin, as preserved in B, caudal fin squamation restored from , axial lobe shaded. poorly known, since no specimens were available for preparation in acetic acid. However, this fish closely resembles P. elongatus in its form, proportions and squamation, and the available evidence indicates that their skulls were very similar as well. Description, (i) General features. P. microstomus rarely exceeds 75 mm in standard length. It is the only member of the genus having an emarginated anterior dorsal fin (Fig. 31). (ii) Dorsal fin. In contrast to the condition in P. elongatus, in which the two parts of the dorsal fin stand close together, these are separated by a distance equivalent to the width of four scales in P. microstomus. The leading ray exceeds the depth of the trunk in length; it is preceded by about seven basal fulcra and bears two elongated fringing fulcra. The 12 or so remaining rays of the anterior dorsal decrease rapidly in height, forming a deeply concave outline. The posterior dorsal fin, also comprising about 12 rays, is low and convex in outhne. (iii) Squamation. The number of rows and the pattern of the scales closely resemble those of P. elongatus. The ventral and circumanal scales have been drawn and described by Schultze 180. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Museum (Natural History). London : BM(NH)
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