...dorsomedial W-shaped marking, and well-developed stemmata. Mesothoracic and lateral abdominal spiracles are absent. The presence tarsal and tibial natatory sensilla and short secondary sensilla on the proximal urogomphal segment is consistent with the chaetotaxy of previously described Neoporus species.

Key words: Dytiscidae, Neoporus clypealis, larva, morphology, southeastern United States.

**********

INTRODUCTION

The majority of species in the Nearctic genus Neoporus have ranges that either include or that are restricted to the southeastern United States (1). Neoporus is the most specious genus recorded in Georgia with at least 22 species reported from throughout the state, including the Piedmont and Coastal Plain Regions (2). Although Neoporus contains a large number of species, we have been able to find descriptions of immature stages of only nine species. Barman (3) observed oviposition by N. undulatus (Say) and provided brief descriptions of its egg, first, second, and third instars, and pupa. This study also included descriptions of the mature larva of N. dimidiatus (Gemminger and Harold) (as N. solitarius; 4) and N. clypealis (Sharp). Matta and Peterson (5) gave brief descriptions of the mature larvae of N. blanchardi (Sherman), N. carolinus (Fall), N. cimicoides (Sharp), N. lobatus (Sharp), N. shermani (Fall), and N. superioris (Balfour-Browne) based on material collected in the southeast. Alarie (6) identified and described the first, second, and third instars of N. undulatus and the third instar of N. carolinus. The first instar of N. undulatus was included as a reference specimen in the chaetotaxal analyses of the hydroporine last abdominal segment and urogomphi (7) and legs (8). The chaetotaxal analysis of the head (9) included first instars of N. tennetum (Wolfe), N. dimidiatus, and N. undulatus.

Larvae of N. clypealis have been described previously (3), but this study lacks the chaetotaxal detail required by current and more modern nomenclatural standards. The purpose of our study is to...

NOTE: All illustrations and photos have been removed from this article.



More articles from Georgia Journal of Science
Photoelectric magnitude measurements of the lunar eclipses on May 16, ..., December 22, 2004
The impact of ozone on the survivability brine shrimp., December 22, 2004

Looking for additional articles?
Search our database of over 3 million articles.

Looking for more in-depth information on this industry?
Search our complete database of Industry & Market reports by text, subject, publication name or publication date.

About Goliath
Whether you're looking for sales prospects, competitive information, company analysis or best practices in managing your organization, Goliath can help you meet your business needs.

Our extensive business information databases empower business professionals with both the breadth and depth of credible, authoritative information they need to support their business goals. Whether it be strategic planning, sales prospecting, company research or defining management best practices - Goliath is your leading source for accurate information.