Mucronia, Fjellberg, Arne, 2010

Fjellberg, Arne, 2010, Cryophilic Isotomidae (Collembola) of the Northwestern Rocky Mountains, U. S. A., Zootaxa 2513, pp. 27-49 : 43

Mucronia gen. n.

Type species: Mucronia enigmatica sp. n.

Diagnosis of the genus. The genus belongs to the family Isotomidae as defined by the following characters: Body elongated with normal setal cover, scales absent. Prothorax without dorsal setae. Mid-dorsal length of abdominal segment 3 slightly longer (1.2) than segment 4. Trochanteral organ absent. The two single characters which separate the new genus from most other genera of the family are presence of a clearly lobed PAO ( Fig. 94 ) and a mucro bearing more than one seta ( Fig. 102 ).

Figures

FIGURES 93 – 109. Mucronia enigmatica gen. n., sp. n. (93) habitus, adult male, (94) PAO and nearest ocelli, (95) trifurcate maxillary palp (Mx. plp.), labial palp with papillae A – E, basomedian field (bm. f.) and basolateral field (bl. f.) with 4 and 5 setae respectively, (96) right maxilla with six lamellae and a stylet (st), (97) labrum and frontoclypeal field, (98) maxillary outer lobe, (99) left ant. 3 organ, (100) setae on inner side of left mid leg, (101) ditto, left hind leg, (102) right mucro, (103) left labial palp with papillae (A – E), numbered guard setae (a – e), proximal setae (pr) and lateral process (lp), (104) manubrium, ventral side, (105) dens, (106) genital papilla of reproductive male, ventral, (107) ditto, lateral, (108) genital tract of reproductive male showing two swellings, (109) hind claw.