. Bulletin of the Natural History Society of New Brunswick. DESCKIPTION OF AN EXTINCT PALEOZOIC INSECT. 55 Geracus tubifer. n. sp. Apterous. Body obscurely divided into three regions of head, thorax and abdomen; somites of the head cemented and fused (?) with the prothorax, all the others separate, and approximately of equal width. Head conical, prolonged into a tube or pro- boscis, which is thrice as long as the rest of the head (and of separable parts 1). No eyes or antennfe are recognizable. The rest of the thorax consists of two separate rings of subequal length; of these the mesothorax is


. Bulletin of the Natural History Society of New Brunswick. DESCKIPTION OF AN EXTINCT PALEOZOIC INSECT. 55 Geracus tubifer. n. sp. Apterous. Body obscurely divided into three regions of head, thorax and abdomen; somites of the head cemented and fused (?) with the prothorax, all the others separate, and approximately of equal width. Head conical, prolonged into a tube or pro- boscis, which is thrice as long as the rest of the head (and of separable parts 1). No eyes or antennfe are recognizable. The rest of the thorax consists of two separate rings of subequal length; of these the mesothorax is wider than the other laterally. The meta- thorax narrows backward at the sides, and at its posterior edge the body of the insect is narrowest. Under this interpretation of the thorax, we suppose the prothorax fused with the head, or suppressed. The legs are unknown, except that there is an obscure impression of the second one on the right side. The abdomen is ovate and somewhat pointed behind, and consists of six joints. The first ring of the abdomen has the posterior margin pushed forward in the middle. The three next have directly transverse margins, but the line dividing the fourth and fifth joints is slightly arched foaward in the middle, and these two joints may be anchylosed. At the back of the last joint is a narrow obscure slope, slightly emarginate. No appendages are visible. Size. Length 13 mm. Length of head, including the tube, 4 mm.; width 2 mm. Length of thorax 3 mm.; width 3 mm. Length of abdomen 6 mm.; width 4 mm. Horizon and Locality. Dai'k shales of Plant Bed No. 2, Lower Cordaite shales of the Little River Group. Lancaster, St. John County, N. B. Rare. Condition of Preservation. This fossil presents the brownish- black, shining surface, characteristic of the insects and myriapods. Fig. 3. Gracus tubtpbr. n. gen. and sp. mag. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - colora


Size: 873px × 2864px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookauthornaturalhistorysociety, bookcentury1800, bookdecade1890