Carabus nemoralis Muller (Carabidae)

Ferreira, Raul N., 2011, Three anomalies of Coleoptera (Carabidae, Staphylinidae, and Scarabaeidae) from Connecticut, Insecta Mundi 2011 (169), pp. 1-3 : 1

Carabus nemoralis Muller (Carabidae)

Figure 1

Carabus Linnaeus ( Carabidae , Carabinae , Carabini ) is represented in Connecticut by six species (Krinsky and Oliver 2001). This specimen was collected by Dr. M. K. Oliver in Connecticut, New Haven Co., Hamden in his backyard under a log on muddy soil on VII-19-1986. The specimen presents a binary schistomely on the right maxillary palpus. The bifurcate maxillary palpus ( Fig. 1B ) shows the first segment longer, wider and truncate when compared with the normal left maxillary palpus ( Fig. 1A ), forming a bifurcation into two segments ( Fig. 1B, 1C ) of the same size and configuration as compared with the normal segments of the left maxillary palpus. According to Balazuc (1948) this anomaly could result from an exterior action on the larva which caused a split in the distal segment. When regeneration takes place the agent stays in contact and the wound remained divided into two, avoiding the fusion of the two split parts.

Figures

Figure 1-3. Beetle anomalies. 1) Carabus nemoralis Muller. Drawing of maxillary palpus; a) Normal; b) Abnormal; c) Dorsal view of habitus. 2) Oxyporus rufipennis LeConte. Drawing of antennas; a) Normal; b) Abnormal; c) Dorsal view of head. 3) Phyllophaga glaberrima (Blanchard). Ventral drawing of middle legs; a) Normal; b) Abnormal; c) Dorsal view of habitus.