Anodontophora, Pomorski, Romuald J., 2007

Pomorski, Romuald J., 2007, Anodontophora tuvensis gen. nov. et sp. nov. (Collembola: Onychiuridae: Tetrodontophorinae), Zootaxa 1521, pp. 63-66 : 63

Anodontophora gen. nov.

Type species: Anodontophora tuvensis sp. nov.

Diagnosis. Body pigmented, cylindrical, relatively short and robust, without anal spines. All abdominal segments well defined. Dorsal side of body with dorsomedial, lateral and ventral pseudocelli. Pseudocelli well chitinised. Dorsal posterior cephalic pseudocelli present. Parapseudocelli absent. Furca functional, with a fully developed with mucro. Subapical organite present. Antennal III sense organ composed of 4 guard setae and 5 papillae. PAO absent. Type O labial palp with 9 proximal setae ( Fig. 7 ). Head of maxilla typical with short and not modified lamellae, slightly projecting above well developed three-toothed ungulum. Dorsal chaetotaxy of plurichaetotic type. Dorsal setae poorly differentiated into sticklike and apically rounded macro- and mesosetae and apically pointed microsetae. Body sensilla not marked. Tibiotarsal distal whorl with 11 setae.

Etymology. The genus name refers to the lack of anal spines.

Discussion. Anodontophora gen. nov. belongs in the subfamily Tetrodontophorinae because of the presence of a functional jumping apparatus, pigmented body, increased number of proximal setae (to 9) on the labial palp, and the typical structure of the head of maxillae. The new genus is characterized by the absence of postantennal organ and a cylindrical body shape. The two related genera, Tetrodontophora and Homaloproctus , have the postantennal organ and their body is distinctly flattened dorsoventrally with a sharp lateral edge. In addition, the genus Tetrodontophora is characterized by the presence of anal spines and spine-like appendages at the posterolateral edges of abdominal segment V. The genus Homaloproctus is distinguishable by the lack of anal spines and the autapomorphic presence of 6 small papillae on the antenna tip and a group of distally clubbed setae on the dorsal side of tibiotarsus.

Figures

FIGURES 6 – 13. Anodontophora tuvensis, holotype: 6, chaetotaxy and localisation of pseudocelli on ventral side of head; 7, labial palp; 8, tibiotarsal chaetotaxy and claw; 9, macroseta; 10, mesoseta; 11, microseta; 12, chaetotaxy and localisation of pseudocelli on abdominal sterna I-VI; 13, mucro and dens.