Sphenodillo Lewis, 1998b

Lillemets, B. & Wilson, G., 2002, Armadillidae (Crustacea: Isopoda) from Lord Howe Island: New Taxa and Biogeography, Records of the Australian Museum 54, pp. 71-98 : 94-96

Sphenodillo Lewis, 1998b

Sphenodillo Lewis, 1998b: 773 .

Type species. Sphenodillo agnostos Lewis, 1998b by subsequent designation (not Sphenodillo howensis ”, nomen nudum).

Remarks. Sphenodillo Lewis (1998b) is monotypic as originally described and Sphenodillo howensis was designated as the type species in that publication. Lewis (1998b), however, contains no description of Sphenodillo howensis ”, so this name is a nomen nudum. Therefore, we designate S. agnostos Lewis, 1998b , the sole described species in the genus, as the type species of Sphenodillo Lewis, 1998b .

Key to the Armadillidae of Lord Howe Island (modified from Lewis, 1998b) 1 Epimera without endolobes ( Australiodillo ) ................................................................................. 2

Epimera 1–2 with endolobes ......................................................................................................... 7 2 Dorsal surface with sharp spines ...................................... Australiodillo primitivus Vandel, 1973

Dorsal surface tuberculate ............................................................................................................. 3 3 Epimera 1–2 anteroventral surface with shoulders ................ Australiodillo armus Lewis, 1998b

Epimera 1–2 anteroventral surface without shoulders .................................................................. 4

4 Dorsal surface densely setose ............................................... Australiodillo setosus Lewis, 1998b

Dorsal surface not densely setose .................................................................................................. 5

5 Pleonites 1–5 posterior margins without distinct midline tubercle .............................................................................. Australiodillo anomalus Lewis, 1998b

Pleonites 1–5 posterior margins with distinct midline tubercle .................................................... 6

6 Pleon dorsal tubercles sharp; body <12 mm long ............... Australiodillo insularis Vandel, 1973

Pleon dorsal tubercles rounded; body> 12 mm long ......... Australiodillo muscosus Lewis, 1998b

7 Uropodal exopods absent ......................................... Pseudodiploexochus pacificus Lewis, 1998b

Uropodal exopods present ............................................................................................................. 8

8 Pleotelson divided into three parts separated by fine lines, middle section with two lateral tubercles ............................................. Orthodillo chiltoni Vandel, 1973 *

Pleotelson not divided into three parts .......................................................................................... 9

9 Pleotelson with heavy dorsal keel; endolobes rounded ......... Sphenodillo agnostos Lewis, 1998b

Pleotelson without heavy dorsal keel .......................................................................................... 10

10 Epimera near horizontal; tooth-like endolobes ........................................................................... 11

Vertical or angled epimera; rounded tubercles ............................................................................ 16

11 Large club-like tubercles on pereon dorsal surface; high, uncleft frontal lamina .......................................................................... Stigmops howensis ( Lewis, 1998b)

Pereon dorsal tubercles not club-like; frontal lamina cleft or entire ............................................................................................................................................. 12

12 Four high cephalic tubercles, ridge above eyes; frontal lamina cleft or indented ........................................................................................................................... 13

Cephalic tubercles lower than; frontal lamina entire .................................................................. 15

13 Frontal lamina indented ................................................................... Stigmops odontotergina n.sp.

Frontal lamina cleft ...................................................................................................................... 14

14 Cephalic tubercles not higher than pereon tubercles ............................. Stigmops polyvelota n.sp.

Cephalic tubercles much hi gher than pereon tubercles ..... Stigmops demiclavula ( Lewis, 1998b)

15 Frontal lamina straight ...................................................................... Pyrgoniscus scopelicus n.sp.

Frontal lamina curved forming three lobes ...................... Pyrgoniscus intermedius Lewis, 1998b

16 Dorsal surface densely setose ......................................................... Cubaris hirsuta Lewis, 1998b

Dorsal surface not densely setose ................................................................................................ 17

17 Epimera 6 posterior margin with notch ......................................... Cubaris crenata Lewis, 1998b

Epimera 6 posterior margin without notch .................................................................................. 18

18 Epimera 1 posterior margin sharply rectangular ............................ Cubaris goweri Lewis, 1998b

Epimera 1 posterior margin rounded/ subrectangular ................................................................. 19

19 Dorsal surface granulated; epimera 1 endolobe broadly rounded ...... Cubaris lewisae nom. nov.

Dorsal su rface not granulated ...................................................................................................... 20

20 Pleotelson sides parallel ............................................................................. Cubaris dhaliwali n.sp.

Pleotelson hour glass-shaped ........................................................................................................ 21

21 Pleotelson proximal width 0.95–1.05 distal width ................... Cubaris ferruginea Lewis, 1998b

Pleotelson proximally wider than distally ................................................................................... 22

22 Antenna flagellar article 1 length 0.25 article 2 length ................. Cubaris fasciata Lewis, 1998b

Antenna flagellar article 1 length 0.5 article 2 length ............... Cubaris minilobus Lewis, 1998b