. Bulletin of the British Ornithologists' Club. Alexandre Aleixo et al. 244 Bull. 2007 127(3). Figure 1. Bill outlines (Swainson 1837: 313, fig. 28 le) accompanying Swainson's diagnosis of Dendroplex and reference to 'D. guttatus Spix, i, [pi.] 91. f. 1.' as the genus type (Swainson 1837: 314). The illustration refers unambiguously to the only species in the entire family Dendrocolaptidae known to possess this particular bill shape: Xiphorhynchus picus = Oriolus picus J. F. Gmelin, 1788. Swainson (1827: 354) was unsure whether the taxon on which he based Dendroplex had been described. T
. Bulletin of the British Ornithologists' Club. Alexandre Aleixo et al. 244 Bull. 2007 127(3). Figure 1. Bill outlines (Swainson 1837: 313, fig. 28 le) accompanying Swainson's diagnosis of Dendroplex and reference to 'D. guttatus Spix, i, [pi.] 91. f. 1.' as the genus type (Swainson 1837: 314). The illustration refers unambiguously to the only species in the entire family Dendrocolaptidae known to possess this particular bill shape: Xiphorhynchus picus = Oriolus picus J. F. Gmelin, 1788. Swainson (1827: 354) was unsure whether the taxon on which he based Dendroplex had been described. Ten years later, when he next cited Dendroplex (Swainson 1837: 313-314), the original diagnosis was maintained and even illustrated in detail (see Fig. 1), but 'Z). guttatus Spix, i, [pi.] 91. f. 1.' was mentioned as belonging to the genus apparently in accordance with Lesson (1830: 313), who a few years earlier explicitly equated 'D. guttatus Spix, pi. 91' with 'Oriolus picus Gm.' Lesson's entry reads: '5. Picucule talapiot; Dendrocolaptes guttatus Spix, pi. 91. Oriolus picus, Gm.; Gracula picoides, Shaw; Enl., 605.' 'Enl., 605' refers to 'Le Talapiot' Daubenton, 1770-83, Planches enluminees d'histoire naturelle, in Buffon, Histoire naturelle des oiseaux, pi. 605 (Cayenne), in turn the basis of J. F. Gmelin's Oriolus picus. Gracula picoides Shaw, 1809, General zoology, or systematic natural history, 7, no. 2, p. 476, was merely a new name for Oriolus picus J. F. Gmelin, 1788. Lesson's description of the Picucule Talapiot, including as it does 'Bee presque droit, corne', bill nearly straight, horn-coloured, probably determined Swainson's acceptance of Lesson's treatment. There is a significant discrepancy between the levels of detail and resolution of the bill outline presented in fig. 28le of Swainson (1837: 313) as diagnostic of Dendroplex (see Fig. 1) and that of D. guttatus in Spix's plate, chosen by Swainson (1837) as the type of Dendroplex. Whilst the latter is poor i
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