Texoreddellia

Espinasa, Luis, Bartolo, Nicole D., Centone, Danielle M., Haruta, Charisse S. & Reddell, James R., 2016, Revision of genus Texoreddellia Wygodzinsky, 1973 (Hexapoda, Zygentoma, Nicoletiidae), a prominent element of the cave-adapted fauna of Texas, Zootaxa 4126 (2), pp. 221-239 : 237-238

Key to Texoreddellia spp.

1. Pedicellus projection in adult males blade-like, not very conspicuous, extending parallel to antennae. Length of the projection shorter than one third the length of pedicellus ( Figs. 4 B–D, 6B–C and 9C–D)..................................... 2

- Pedicellus projection in adult males spine-like, conspicuous, extending perpendicular to antennae. Length about half the length of pedicellus (Fig. 8A–B, H)........................................................................... 5

2. Legs relatively long ( Fig. 3 ), hind tibia 6‒10 times longer than wide and approximately two-thirds the tarsus length (Fig. 5A‒C). Mouthparts long and slim in large specimens; penultimate article of maxillary palp 1.2‒1.5 times longer than terminal article ( Fig. 4 G‒I) and penultimate article of labial palp about 3 times longer than wide ( Fig. 4 F). Ovipositor short, barely surpassing apex of stylets IX, with 12 annuli (Fig. 5F)..................................... T. texensis species complex

- Legs relatively short ( Fig. 3 ), hind tibia 4‒6 times longer than wide and approximately four-fifths the tarsus length (Figs. 6G and 7D). Mouthparts short and robust; penultimate article of maxillary palp approximately equal in length to terminal article (Figs. 6E, 7C), and penultimate article of labial palp about 2 times longer than wide (Figs. 6F, 7B, 9B). Ovipositor short to long, with 12 or more annuli........................................................................... 3 3. Ovipositor relatively short, surpassing base of stylets IX by about 1.2‒1.5 times the length of the stylets, with 12‒14 annuli (similar to fig. 5F)......................................................................... T. coahuilensis

- Ovipositor long, surpassing base of stylets IX by more than 1.5 times the length of the stylets, gonapophysis with 14 or more annuli............................................................................................. 4

4. Ovipositor long, surpassing base of stylets IX by 1.6‒2.1 times the length of the stylets length. Gonapophysis with 14‒15 annuli (Fig. 7F–G)............................................................................. T. media

- Ovipositor very long, surpassing base of stylets IX by 2.0‒2.2 times the length of the stylets. Gonapophysis with 16‒18 annuli (Fig. 6I).................................................................................. T. aquilonalis

5. Head with setae but without scales (Fig. 8A). Ovipositor very long, surpassing base of stylets IX by more than 2.0 times the length of the stylets (Fig. 8F).................................................................... T. occasus

- Head with setae and scales (Fig. 8G). Ovipositor long, surpassing base of stylets IX by about 1.6‒2 times their length (Fig. 8J)....................................................................................... T. capitesquameo

Figures

FIGURE 3. Parsimony bootstrap consensus tree. Texoreddellia capitesquameo from Phantom Lake Cave (Clade 4, Group 8) as outgroup is not shown. Branches where more than one cave locality are included indicate that they had identical DNA sequences in their 16 S rRNA. Individuals within each of the seven groups are concordant to a particular morphology.

FIGURE 4. Known geographic ranges of Texoreddellia spp. by county. a) T. capitesquameo; b) T. occasus; c) T. coahuilensis; d) T. media; e) T. aquilonalis; f) T. texensis. Areas shaded in black are counties in which DNA sequencing confirmed species identification. Areas shaded in gray are counties in which species identity has been determined solely through morphological analysis.