Hydrocanthus ( Young 1985 )

Miller, Kelly B., 2001, Hydrocanthus (Hydrocanthus) Paludimonstrus, A New Species From Bolivia (Coleoptera: Noteridae: Hydrocanthini) And Its Implications For Classification Of The Subgenera, The Coleopterists Bulletin 55 (3), pp. 363-368 : 367

Modification of key to American Hydrocanthus ( Young 1985)

Young’s (1985) key to the Hydrocanthus is not easily modified given the unique character combinations present in the taxa described herein and the format of his key. However, the modifications presented below in combination with illustrations of the median lobe here and in Young (1985) and the diagnoses of the species should aid in identification of the taxa.

Hydrocanthus paludimonstrus will key to couplet 2 in Young (1985), but doesn’t fit either choice very well. The following two couplets replace couplet 2.

2a(1 ') Median lobe of aedeagus with apex truncate ( Fig. 5 ) with long, straight apicodorsal spine; lateral pronotal margins strongly rounded ( Fig. 2 ); total length 4.4–4.6 mm ------------------------------------------------------------------------------ --------------------------------------------------------------------- H. (s. str.) paludimonstrus Miller , n. sp.

2a ' Median lobe of aedeagus not truncate, if so then without long, straight apicodorsal spine, if truncate and with long, straight spine (i.e., H. debilis ) then length less than 4.0 mm and with lateral pronotal margins not as strongly rounded --------------------------------------------------------------------------------- 2b

2b(2a ') Total length greater than 4.1 mm ---------------------------------------------------------------- 3

2b ' Total length less than 4.1 mm --------------------------------------------------------------------- 17

Figures

Figs. 1–8. Hydrocanthus paludimonstrus n. sp. 1) Body, dorsal aspect; 2) body, left dorsolateral aspect; 3) body, left lateral aspect; 4) pronotum, indicating black pattern present in many males; 5–7) male genitalia; 5) median lobe, right lateral aspect; 6) right lateral lobe, right lateral aspect; 7) Left lateral lobe, left lateral aspect; 8) female genitalia. bc = bursa copulatrix, co = common oviduct, fd = fertilization duct, gc = gonocoxa, gs = gonocoxosternite, lt = laterotergite, r = rami, sd = spermathecal duct, sp = spermatheca, vs = ventral sclerite. Scale bars; a = 1.00 mm for Figures 1–4; b = 0.25 mm for Figure 8.