Morphological and molecular characterisation of Californian species ...

S. Álvarez-Ortega et al.
Table 1. Morphometric data of Metaporcelaimus capitatus (Thorne & Swanger, 1936) Andrássy, 2001 and M. marinensis sp. n. All
measurements are in μm except L in mm, and in the form: mean ± s.d. (range).
Character M. capitatus M. marinensis sp. n.
Sonoma County Redwood forest
Marin County Laurel trees
Females Females Males
– Holotype Paratypes Paratypes
n 3 – 2 4
L 2.41 ± 0.14 2.40 2.48, 2.36 2.14 ± 0.12
(2.24-2.50) (1.99-2.29)
a 34, 36 43 39, 43 39.4 ± 0.7
(39-40)
b 4.0, 4.2 4.5 4.7, 4.8 4.5 ± 0.2
(4.2-4.7)
c 48, 50 52 45, 49 46.5 ± 3.4
(43-51)
c ′ 1.4, 1.5 1.3 1.6, 1.5 1.3 ± 0.1
(1.3-1.4)
V 57.5 ± 1.2 58 55, 56 –
(56-59)
Lipregiondiam. 20.6± 1.4 14 14, 14 14.3 ± 0.4
(19-22) (14-15)
Odontostyle length 19.1 ± 0.3 14 ?, 14 14.2 ± 0.7
(19-20) (13-15)
Odontophore length 39.6 ± 0.7 25 26, 27 25.4 ± 1.3
(39-40) (24-26)
Guiding ring from ant. end 10.0 ± 0.6 8 8, 8 7.8 ± 0.3
(9.5-10.5) (7.5-8.0)
Neck length 600, 624 529 529, 493 472 ± 11.9
(456-484)
Pharyngeal expansion length 321, 354 276 262, 235 229 ± 11.0
(216-243)
Diam. at neck base 65, 67 50 58, 52 48.8 ± 3.9
(45-53)
at mid-body 69, 73 55 63, 54 54.2 ± 4.5
(50-59)
at anus/cloaca 33.0, 35.5 34 35, 32 34.8 ± 1.6
(32-36)
Prerectum length 142 ± 37.8 120 99, 115 143 ± 20.6
(99-169) (117-166)
Rectum length 52.9 ± 3.6 39 44, ? 49.0 ± 6.7
(50-57) (39-55)
Tail length 50, 51 46 55, 48 46.0 ± 2.7
(43-50)
Spicule length – – – 58.7 ± 4.0
(54-63)
Ventromedian supplements – – – 6.5 ± 0.6
(6-7)
4 Nematology