Sphenodillo
| Sphenodillo | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Clade: | Pancrustacea |
| Class: | Malacostraca |
| Order: | Isopoda |
| Suborder: | Oniscidea |
| Family: | Armadillidae |
| Genus: | Sphenodillo Lewis, 1998 |
| Type species | |
| Sphenodillo agnostos Lewis, 1998 | |
Sphenodillo is a genus of woodlice belonging to the family Armadillidae. This genus was described in 1998 by Fiona Lewis. The type specimen for this species is S. agnostos from Lord Howe Island.[1] There is currently one accepted species in this genus.
Description
[edit]Sphenodillo are dark in colour with cream blotches allong their sides slightly above their epimera (side plates). They have short antennae. Their eyes have 17-18 ocelli. Their frontal lamina (face shield) has rounded rectangular lateral angles. They have endolobes (small, ventral lobe-like structures on the underside of the epimera) on the epimera of their first and second segments.They have a trianguar shaped section of raised bumps on their first tergite. All of their tergites have a line of raised bumps across the whole width. The epimera of the second to fourth pereon segments are rounded rectangular; the epimera of the fifth to seventh are rectangular and extend slightly backward. Their telson is hourglass shaped with a raised wedge-like keel. [1]
Remarks on similar genera
[edit]Although Emydodillo spp. have a similar keeled telson, they have a much slighter structure than that defining Sphenodillo. Emydodillo spp. have a high frontal lamina, lobes on their first to third epimera, and antennae with excentrically inserted flagellum. These characteristics separate it from Sphenodillo.[1]
Distribution
[edit]Sphenodillo isopods are endemic to Lord Howe Island and have only been found in small numbers.[2]
Etymology
[edit]The gender of the generic name is masculine. This genus is named to describe the diagnostic telson of this genera. The name derives from the Greek "sphenos" meaning wedge, plus "-dillo", a commonly used suffix in the family Armadillidae.[1]
Species
[edit]- Sphenodillo agnostos Lewis, 1998
Unaccepted species
[edit]- Sphenodillo howensis Lewis, 1998 - this species was mentioned by Lewis in the 1988 publication in a short remark but it is considered a nomen nudum and it is believed that both species names referred to the same specimens.[1][3]
References
[edit]- 1 2 3 4 5 Lewis, Fiona (1998). "Oniscidea (Isopoda) From Lord Howe Island". Crustaceana. 71 (7): 743–777. doi:10.1163/156854098X00022. ISSN 0011-216X.
- ↑ Lillemets, Birgitta (2002). "Armadillidae (Crustacea: Isopoda) from Lord Howe Island: New Taxa and Biogeography" (PDF). Records of the Australian Museum. 54: 71–98.
- ↑ Schmidt, Christian (2004). "Catalogue of genera of the terrestrial Isopoda (Crustacea:Isopoda: Oniscidea)". Steenstrupia. 28 (1): 86.
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