Comprehensive Description

provided by Smithsonian Contributions to Zoology
Caobangia indica

MATERIAL EXAMINED.—India: [1] Kobo [40 km southwest of Sadiya in the drainage system of the Brahmaputra River], Assam (27°47′N, 95°23′E), from ?Antimelania menkiana (Lea) (USNM-M 433497), coll. D. E. Hardy, 15 March 1944 (USNM-W 50635, holotype; USNM-W 50636, paratypes), dry material; [2] Teri Ghat [in the drainage of the Ganges River, near the Nepalese border], (27°19′N, 83°30′E), from Hemimitra stephanus (Benson) (USNM-M 31434) (USNM-W 50637, paratypes), dry material. Bangladesh: [3] Sylhet [in the drainage of the Meghna River, a tributary of the Ganges] (24°54′N, 91°52′E), from Hemimitra stephanus (Benson) (MCZ 256890) (USNM-W 50638, paratypes), dry material.


DESCRIPTION.—All specimens of this species have been dried and the description is based upon setal morphology. Palmate hooks of the first setiger bear from 4 to 7 teeth above the single central fang (Figures 9e, 16a,i,j). The terminal teeth are stouter than the others; the dorsalmost tooth is somewhat longer; the ventralmost tooth is from 2 to 3 times the length of the intermediary teeth. Upper capillary setae of the thoracic region are provided with a narrow limbation, and the lower capillary setae have an expanded limbation more basally (Figure 16b,c). Capillary setae of the abdomen become progressively shorter toward the posterior end of the worm and bear an expanded limbation (Figure 16d,e). The posterior brushlike setae are typical (Figure 16f). The anterior abdominal region has 4 to 7 transverse rows of low avicular hooks, similar to those of the other species of Caobangia (Figure 16g,i,j). The long-necked avicular hooks which accompany the brushlike setae are small and similar to those of C. billeti (Figure 16h).
bibliographic citation
Jones, Meredith L. 1974. "On the Caobangiidae, a new family of the Polychaeta, with a redescription of Caobangia billeti Giard." Smithsonian Contributions to Zoology. 1-55. https://doi.org/10.5479/si.00810282.175