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First report of Rhabditis (Rhabditella) axei with the invasive palm borer Paysandisia archon Cover

First report of Rhabditis (Rhabditella) axei with the invasive palm borer Paysandisia archon

Open Access
|Mar 2024

Figures & Tables

Figure 1:

Rhabditis axei: (A) male, entire body; (B) head region at SEM; (C) pharyngeal region; (D) vulva; (E) eggs at mid-body; (F) spicules and gubernaculum; (G) spicules at SEM.

Table 1.

Measurements Morphometrics of Rhabditis axei (14 females and 21 males). All measurements are in μm: mean ± s.d. (range). Comparison with measurements given by Goodey (1963) and Meamar et al. (2007). L: body length; MBD: maximum body diameter; ES: distance of the base of the pharynx from head end; B: buccal cavity length; T: tail length; SP: spicule length; GU: gubernaculum length; V: distance of vulva from head end; a: L/MBD; b: L/ES; c: L/T; V%: V/L*100.

CharacterCurrent studyAccording to Goodey, 1963According to Meamar et al., 2007
Female (μm)Male (μm)Female (μm)Male (μm)Female (μm)Male (μm)
L1369.1 ± 196.1 (1128.2–1862.4)1236.5 ± 194.9 (890.9–1705.0)(760.0–1180.0)(740.0–950.0)1135.7 ± 88.3 (910.0–1374.1)894.3 ± 62.7 (673.4–1137.5)
MBD63.4 ± 14.9 (42.5–92.6)47.2 ± 13.9 (25.4–75.9)--53.7 ± 5.3 (45.5–68.2)39.9 ± 3.3 (27.3–54.6)
ES213.2 ± 17.1 (191.8–242.8)205.2 ± 11.8 (183.8–233.5)----
B26.5 ± 3.1 (23.4–34.4)24.6 ± 2.1 (21.9–30.9)--22.5 ± 1.4 (19.9–26.4)22.9 ± 1.2 (19.8–26.4)
T301.7 ± 56.3 (221.5–434.4)265.8 ± 38.6 (177.1–332.8)--307.6 ± 25.8 (235.4–363.0)189.1 ± 12.8 (154.0–228.8)
SP-44.5 ± 5.0 (37.7–53.9)---38.1 ± 1.3 (33.0–44.0)
GU-30.2 ± 3.1 (26.0–35.4)---27.3 ± 0.9 (24.2–30.8)
V664.9 ± 99.1 (524.6 – 912.4)---490.9 ± 39.6 451.4–530.5-
a22.2 ± 3.5 (16.8–29.4)27.4 ± 5.4 (18.7–39.6)(20.0–32.0)--(21.0–29.0)
b6.4 ± 0.8 (4.8–8.2)6.0 ± 0.8 (4.5–7.6)(4.1–6.5)--(4.0–5.4)
c4.6 ± 0.5 (3.8–5.4)4.6 ± 0.6 (3.8–7.0)(3.6–5.0)--(3.5–5.0)
V%48.6 ± 2.8 (44.8–53.8)-(38.0–50.0)---
Figure S1:

Bayesian trees of the genus Rhabditis based on A) SSU and B) LSU gene fragments. Accession numbers of sequences were reported in brackets and posterior probability was annotated near the branches. The strains isolated during this work were highlighted in red.

DOI: https://doi.org/10.2478/jofnem-2024-0005 | Journal eISSN: 2640-396X | Journal ISSN: 0022-300X
Language: English
Submitted on: Aug 27, 2023
Published on: Mar 14, 2024
Published by: Society of Nematologists, Inc.
In partnership with: Paradigm Publishing Services
Publication frequency: 1 issue per year

© 2024 Chiara Sciandra, Sara Amoriello, Emilia Innocenti Degli, Valentina Nicotera, Francesco Barbieri, Giuseppe Mazza, Giulia Torrini, Pio Federico Roversi, Agostino Strangi, published by Society of Nematologists, Inc.
This work is licensed under the Creative Commons Attribution 4.0 License.