. Bonner zoologische Monographien. Zoology. 110. teeth : Distribution of maxillary teeth in ostariophysans (hypothesis of interrelationships after Fink & Fink 1981 and present paper). Character 2. A maxilla with several rows of teeth occurs in parallel in ^Hypsidoris and the diplomystid Olivaichthys. The presence of one or two rows of teeth in the max- illa is the common condition found in Diplomystes. 2) Maxilla: 0: without teeth 1: with one or two rows of teeth 2: several rows of teeth Character 3 and 4. A single elongate anterior process of the maxilla bearing one articular facet
. Bonner zoologische Monographien. Zoology. 110. teeth : Distribution of maxillary teeth in ostariophysans (hypothesis of interrelationships after Fink & Fink 1981 and present paper). Character 2. A maxilla with several rows of teeth occurs in parallel in ^Hypsidoris and the diplomystid Olivaichthys. The presence of one or two rows of teeth in the max- illa is the common condition found in Diplomystes. 2) Maxilla: 0: without teeth 1: with one or two rows of teeth 2: several rows of teeth Character 3 and 4. A single elongate anterior process of the maxilla bearing one articular facet for the pars autopalatina or the autopalatine is present in gymnotoids and characiforms respectively; in the Diplomystidae the process carries two facets for the articulation with the autopalatine. These facets are parallel to each other and they may be close to each other as in Diplomystes camposensis (Fig. 19A) or they may be broadly separate as in D. nahuelbutaensis (Fig. 18B). The facets may be seen as sHght concavities (, D. camposensis), or as short, broad projecting processes (, D. nahuelbutaensis). In most siluroids, the anterior articular region of the maxilla is rudimentary and modified into two rudimentary processes, each of which articulate with the autopalatine. This feature is a synapomorphy of '\Hypsidoris plus Siluroidea ( = Siluroidei sensu Grande 1987).. 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 Bonn, Zoologisches Forschungsinstitut und Museum Alexander Koenig
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