. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 130 ANNALS OF THE SOUTH AFRICAN MUSEUM Other material SAM-K4648-50, K4770-73, K4766, K4779, K4785, K4789, K4791, and an anterior dorsolateral plate preserved on K4798. Diagnosis As for genus, only species. Remarks The ventral thoracic armour shows a superficial resemblance to that of the petalichthyid Lunaspis (see Gross 1961); the armour is short and broad and the spinals are set at a divergent angle. However, unlike Lunaspis, Barrydalaspis shows well-differentiated posterior ventrolaterals. (Gross
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 130 ANNALS OF THE SOUTH AFRICAN MUSEUM Other material SAM-K4648-50, K4770-73, K4766, K4779, K4785, K4789, K4791, and an anterior dorsolateral plate preserved on K4798. Diagnosis As for genus, only species. Remarks The ventral thoracic armour shows a superficial resemblance to that of the petalichthyid Lunaspis (see Gross 1961); the armour is short and broad and the spinals are set at a divergent angle. However, unlike Lunaspis, Barrydalaspis shows well-differentiated posterior ventrolaterals. (Gross (1961) describes two pairs of plates lying behind the anterior ventrolaterals in Lunaspis, the posterior ventrolaterals and the postero-ventrals. These are interpreted as body scales by Miles & Young (1977) and their interpretation is accepted here.) Furthermore, the dorsal part of the armour is similar to that of a phlyctaenioid and unlike that of a petalichthyid in showing a 'ball and socket' dermal neck joint and a large posterior dorsolateral. The anterior ventrolateral (AVL) is short and broad, being 1,35 times as wide as long in the smallest individuals and 1,25 times as wide as long in the. Fig. 1. Barrydalaspis theroni gen. et sp. nov. Silicone cast of holotype showing ventral thoracic armour in external 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 South African Museum. Cape Town : The Museum
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
