Radial Pores Research Articles

Antennal sensilla of the adult alfalfa weevil, Hypera postica (Gyllenhal) (Coleoptera : Curculionidae)

Sensilla on the antennae of adult alfalfa weevils, Hypera postica (Gyllenhal),were studied with scanning and transmission electron microscopes to determine the sensilla structure and possible chemo- and mechanoreceptive functions for food detection. Five types of sensilla trichodea (s.t.) occur (length 35 – 135 μm); s.t. I (71 – 135-μm long)are thick-walled without radial pores and s.t. II (50 – 75-μm long), the most abundant s.t., are multiporous. Bifurcated and trifurcated types (75 –85 -μm long) also occur. Five types of sensilla basiconica (s.b.) are present and include s.b. I (26 – 50-μm long), a fluted uniporous type with a rugose surface and encircling ledges; s.b. II (15 – 35-gm long), a common multiporous type with many longitudinal grooves; and s.b. IV (4 – 7-μm long), which are 3 apical, short pegs. Sensilla styloconica occur in a small band among the s.b. type II. One or 2 epidermal gland ducts are adjacent to most s.t. and some s.b.

Use of Radial Pores in Taxonomy and Paleoecology of Ostracoda: ABSTRACT

On the lateral surface of the carapace, ostracodes have radial pores of two types--simple and sieve. The functions of these two pore types are not fully known. Studies of the carapace with a scanning electron microscope reveals differences between the pores of Myodocopa, Platycopina, Cladocopa, and Podocopina. Sieve pores demonstrate the greatest dimorphism and are confined to the superfamily Cytheracea. A basic pattern of pores was formulated. Type A: Single pore with a sensory hair. A^prime Normal pore without a lip. A^Prime Normal pore with a lip. Type B: A sieve plate without a well-defined central or subcentral pore with a sensory hair. Type C: Type A superimposed on Type B. A sieve plate with a pore and sensory hair emerging from its center. Type D: Combination of Type A and Type B. A sieve plate, and a separate single pore with a sensory hair. These types can be utilized in future systematic studies of Ostracoda. End_of_Article - Last_Page 2042------------