New records and a new cave-dwelling species of Agoristenidae (Arachnida, Opiliones) from Colombia
Author
Garcia, Andres F.
Departamento de Invertebrados, Museu Nacional / Universidade Federal do Rio de Janeiro (UFRJ), Quinta da Boa Vista, Sao Cristovao, 20.940 - 040, Rio de Janeiro, RJ, Brazil
agarciarinc@gmail.com
Author
Vargas, Alex Gonzalez
Grupo de Investigacion Ecologia y Biodiversidad en Ecosistemas Tropicales (EBET), Semillero de Investigacion Bioespeleologia Neotropical, Facultad de Ciencias Basicas, Universidad de La Guajira, Riohacha, Colombia
Author
Estrada, Miguel Gutierrez
Grupo de Investigacion Ecologia y Biodiversidad en Ecosistemas Tropicales (EBET), Semillero de Investigacion Bioespeleologia Neotropical, Facultad de Ciencias Basicas, Universidad de La Guajira, Riohacha, Colombia
text
Zoosystematics and Evolution
2022
2022-02-16
98
1
55
63
http://dx.doi.org/10.3897/zse.98.78202
journal article
http://dx.doi.org/10.3897/zse.98.78202
1860-0743-1-55
F6DA891882B849C5BD64FE152C5D71BE
A7ED6822DF245CC385E84C2DA8697421
Avima troglobia (Pinto-da-Rocha, 1996)
Figs 4
, 6A
Trinella troglobia
Pinto-da-Rocha, 1996: 321, figs 4, 8, 15-16; Kury, 2003: 34.
Avima troglobia
(Pinto-da-Rocha, 1996): Villarreal & Kury, 2009: 67.
Type material.
VENEZUELA• 1 ♂ holotype and 3 ♀ paratypes: Zulia, rio Socuy, cueva de Los Laureles; [10.751 -72.462]; 750 m a.s.l.; 20 Dec. 1990; J. Camacho and A. Viloria leg.; MBUZ• 2 ♀ paratypes; same data as previous [in the original label says Sierra de
Perija
]; MZSP-1457 • paratype; same data as previous; 16 Dec.1992; P. Gnaspini and E. Trajano leg.; MZSP-14578• 2 ♀ paratypes; same data as previous, Cueva La Carlotica; 760 m a.s.l., 21 Dec.1990; J. Camacho, A. Viloria and T. Barros leg.; MBUZ• 1 ♀ paratype; same data as previous; MNRJ 5472!.
New records.
COLOMBIA• 3 ♀: La Guajira, Barrancas, corregimiento San Pedro, Las Pavas; Cueva, finca La Fortuna;
10°50'04.8"N
,
72°40'34.4
''
W
, [
10.834667
-72.676222
]; 1731 m a.s.l.; 8 May 2018; Miguel
Gutierrez
leg.; ICN-Ao-1978• 1 ♂ 1 ♀; same data as previous; MNRJ 59052. First records for the country.
Complementary description.
Body
. DS Epsilon type 1. Ocularium low, domed, smooth, and without eyes (Fig.
4D, F
) Mesotergum divided into four ill-defined areas, smooth; (Fig.
4A-C
). Areas I-IV with a pair of minute paramedian granules; area I divided into two halves; area II-IV undivided (Fig.
4A, D
). Posterior border of scutum substraight. Free tergites I-III with some tubercles.
Venter
.
Stigmatic area with a few granules. Stigmata large, oval and oblique (Fig.
4E
).
Legs
. Increasing in thickness from leg I to leg IV, but legs III and IV at least twice as thick as legs I and II, unarmed. Leg I filiform. Leg IV with darker coloration than the others. Fe IV length four times DS length (Fig.
4D
).
Penis
.
LP small and depressed, crescent-shaped, with anterolateral rounded corners apically pointed (Fig.
4G, I
). Hammer (malleus) cylindrical, carrying MS-A-B (two pairs of MS-A and one pair of MS-B, all branched) (Fig.
4G, I
); MS-C absent; two pairs of short MS-D located in a keel between the LP and the base of the stylus (Fig.
4G
). MS-E1 large and triffid, MS-E2 short and conical, located slightly distal to MS-E1 on the ventral side of the LP (Fig.
4G, I
). Stylus straight, elongated, surpassing the LP (Fig.
4G, I
), with the tip ventrally curved (Fig.
4H
) and a rectangular dorsal keel (Fig.
4G
).
Coloration (in alcohol)
. Carapace Brilliant Yellow (83) (anterior border) and Brilliant Orange Yellow (67) (posterior border and laterals). Free tergites and chelicerae Brilliant Orange Yellow (67). Pedipalps and legs I-III Brilliant Yellow (83). Leg IV Deep Orange Yellow (69).
Sexual dimorphism
. Chelicerae hypertelic in males.
Figure 4.
Avima troglobia
(Pinto-da-Rocha, 1996) (MNRJ 59052), male. Habitus in dorsal (
A
), frontal (
B
), lateral (
C
), panoramic (
D
), and ventral (
E
) views; detail of ocularium showing the eye absence (
F
). SEM of the penis in lateral (
G
) and ventral (
I
) views; detail of the tip of the stylus (
H
). Scale bars: 2 mm (
A-F
); 50
µm
(
G, I
), 2
µm
(
H
). Macrosetae colors:
A.
= green,
B.
= blue,
D.
= orange,
E.
= magenta.
Natural history.
A. troglobia
was collected exclusively in a cave and shows troglomorphisms (e.g., depigmentation, lack of eyes (Fig.
4F
)), in the same way as the individuals from the Venezuelan caves, corroborating the idea that it is an obligatory cave-dwelling species (Pinto-da-Rocha, 1996).