Parapinnanema
Creators: name: Semprucci, Federica
name: Sørensen, Martin V.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Nematoda
Adenophorea
Desmodorida
Chromadoridae
Parapinnanema

description: Key to the adult males of the genus Parapinnanema
A previous key to the genus was proposed by Warwick & Coles (1975). An updated and modified key to the species is provided below.
1. Buccal cavity with a series of comb-like teeth.............................................................. 2
- Buccal cavity without comb-like teeth..................................................................... 3
2. Male body length> 3000 µm.................................................................. P. imbricatum
- Male body length <3000 µm.................................................................. P. pectinatum
3. L-shaped pieces of gubernaculum with proximal and distal limbs about equal length (ratio <2)........................4
- L-shaped pieces of gubernaculum with lengths of the proximal limbs> distal ones (ratio> 2)........................10
4. Male body length <1450 µm.................................................................. P. mexicanum
- Male body length> 1450 µm............................................................................ 5
5. Sharp flexure of the L-shaped pieces at more than right angle................................................... 6
- Sharp flexure of the L-shaped pieces at ~ right angle.......................................................... 7
6. Spicules with a protuberance at the ventral side of the proximal part and capitulum clearly ventrally curved....... P. bableti
- Spicules without a protuberance at the ventral side of the proximal part and capitulum.......................... P. ritae
7. Median piece laterally expanded up to the L-shaped piece.......................................... P. hawaiiensis
- Median piece without lateral expansions...................................................................8
8. Double-jointed spicules present................................................................ P. rhipsoides
- Double-jointed spicules absent........................................................................... 9
9. L-shaped pieces of gubernaculum notched distally....................................................... P. alii
- L-shaped pieces of gubernaculum not notched......................................................... P. colesi
10. Sharp flexure of the L-shaped pieces at a> right angle................................................ P. shirleyae
- Sharp flexure of the L-shaped pieces at ~ right angle......................................................... 11
11. L-shaped pieces of gubernaculum with proximal limb about 2.6 times as long as the distal one and with a bulge on the inner surface....................................................................................... P. wilsoni
- L-shaped pieces with proximal limb being 2.1 times as long as distal limb, and without bulge.................. P. harveyi
description: Published as part of Semprucci, Federica & Sørensen, Martin V., 2014, A new species of Parapinnanema (Nematoda, Chromadoridae) from Dr Theodor Mortensen's Pacific Expedition 1914 – 16 with an identification key to the genus, pp. 501-512 in Zootaxa 3881 (6) on page 511, DOI: 10.11646/zootaxa.3881.6.1, http://zenodo.org/record/227707