Guaranita munda ( Gertsch, 1982 )

Huber, Bernhard A., Meng, Guanliang, Král, Jiří, Ávila Herrera, Ivalú M. & Izquierdo, Matías A., 2023, Revision of the South American Ninetinae genus Guaranita (Araneae, Pholcidae), European Journal of Taxonomy 900 (1), pp. 32-80 : 46-52

publication ID

https://doi.org/ 10.5852/ejt.2023.900.2301

publication LSID

lsid:zoobank.org:pub:D4F7B982-843D-413C-ADE6-B84AB49FFEAB

DOI

https://doi.org/10.5281/zenodo.10064433

persistent identifier

https://treatment.plazi.org/id/7F0B87C4-FFAE-8028-FDCA-FD34FCFDFADA

treatment provided by

Plazi

scientific name

Guaranita munda ( Gertsch, 1982 )
status

 

Guaranita munda ( Gertsch, 1982) View in CoL

Figs 2C – D View Fig , 8 – 13 View Fig View Fig View Fig View Fig View Fig View Fig , 32B View Fig

Pholcophora munda Gertsch, 1982: 104 , figs 31 – 33, 42 – 44 (♂ ♀).

Guaranita munda View in CoL – Huber 2000: 100, figs 379 – 380; 2014: 140. — Avalos et al. 2006: 193. — Torres et al. 2016: 11, figs 16 – 18.

Diagnosis (amendments; see Huber 2000)

Distinguished from known congeners by size and shape of dorsal flap on procursus ( Fig. 9F View Fig ; larger than in congeners; distally widened) and by female internal genitalia ( Fig. 10C – D View Fig ; large membranous median sac; lateral elements medially curved, creating median posterior indentation also sometimes visible in uncleared epigyna); from G. auadae sp. nov. and G. goloboffi also by narrow distal bulbal sclerite ( Fig. 9G View Fig ); from most congeners (except G. dobby ) also by relatively long male palpal femur ( Fig. 8C View Fig ; length/width 2.50 – 2.55, most other species 1.85 – 2.25, G. dobby 2.50).

Material examined (new records)

ARGENTINA – Córdoba • 6 ♂♂, 5 ♀♀ (one male and one female used for SEM); ~ 2.5 km E of Nono; 31.8025° S, 64.9762° W; 915 m a.s.l.; 2 Mar. 2019; B.A. Huber and M.A. Izquierdo leg.; ZFMK Ar 24122 GoogleMaps 7 ♀♀, in pure ethanol (three prosomata used for molecular work; one female used for SEM); same collection data as for preceding; ZFMK Arg127 GoogleMaps 3 ♂♂, 2 ♀♀; same collection data as for preceding; LABRE-Ar 877 GoogleMaps 3 ♂♂; same collection data as for preceding; LABRE-Ar 878 GoogleMaps 3 ♀♀, in pure ethanol; same collection data as for preceding; LABRE-Ar 882, 883, 856 GoogleMaps 1 ♀, in pure ethanol; ~ 1.5 km E of Nono; 31.7980° S, 64.9877° W; 895 m a.s.l.; 2 Mar. 2019; B.A. Huber and M.A. Izquierdo leg.; ZFMK Arg126 GoogleMaps 2 ♂♂, 1 ♀, 2 juvs; Villa La Merced ; 31.8397° S, 64.5249° W; 765 m a.s.l.; 17 Dec. 2019; Izquierdo and Palen Pietri leg.; litter and bark of Eucalyptus plantation; LABRE-Ar 873 GoogleMaps 1 ♂; Villa La Merced ; 31.8419° S, 64.5240° W; 775 m a.s.l.; 27 Jan. 2020; Izquierdo, Abregú, and Palen Pietri leg.; LABRE-Ar 874 GoogleMaps 4 ♀♀, some juvs; same collection data as for preceding; LABRE-Ar 626 GoogleMaps . – Entre Ríos • 5 ♂♂, 3 ♀♀, 2 juvs (one male used for SEM); Dept. Colón, Parque Nacional El Palmar ; 31.8653° S, 58.2375° W; 20 m a.s.l.; 6 – 8 Aug. 2011; M.J. Ramírez et al. leg.; MACN Ar 32745 GoogleMaps 2 ♂♂, 4 ♀♀, 2 juvs; same collection data as for preceding; MACN Ar 32741 GoogleMaps 1 ♂, 1 ♀; same collection data as for preceding; MACN Ar 32744 GoogleMaps 1 ♂; same collection data as for preceding, with label “muestra de tejido prep. CJG-3350”; MACN Ar 32743 GoogleMaps 1 ♀; Dept. Colón, Parque Nacional El Palmar , Arroyo El Palmar ; 31.8931° S, 58.2385° W; 10 m a.s.l.; 7 Aug. 2011; M.J. Ramírez et al. leg.; MACN Ar 32742 GoogleMaps 1 ♂; Dept. Colón, Parque Nacional El Palmar , Sector Sur ; 31.8877° S, 58.3119° W; 30 m a.s.l.; 7 Aug. 2011; M.J. Ramírez et al. leg.; MACN Ar 32740 GoogleMaps 1 ♀; Parque Nacional El Palmar (no precise locality information); 22 – 23 Nov. 2003; C. Grismado, A. Ojanguren and F. Labarque leg.; MACN Ar 25453 1 ♀; Villa Urquiza ; ~ 31.65° S, 60.38° W (no precise locality information); 17 Feb. 1988; P. Goloboff and C. Szumik leg.; MACN Ar 20030 GoogleMaps .

Redescription (amendments; see Huber 2000)

Measurements of male from E of Nono: total body length 1.06, carapace width 0.42; distance PME– PME 40 µm; diameter PME 50 µm; distance PME–ALE 15 µm; distance AME–AME 15 µm; diameter

AME 30 µm. Leg 1: 1.98 (0.52 +0.14 +0.50 +0.50 +0.32), tibia 2: 0.42, tibia 3: 0.38, tibia 4: 0.60; tibia 1 L/d: 8; diameters of leg femora 0.09; of leg tibiae: 0.06. Tibia 1 in 25 males (incl. holotype): 0.49 – 0.58 (mean 0.53). Sternum slightly wider than long (0.33/0.29). Chelicerae as in Fig. 9A – C View Fig ; stridulatory files ( Fig. 12A View Fig ) with ~15 – 17 ridges each; distances between ridges proximally ~1.0 µm, distally ~2.1 µm. Pedipalp as in Fig. 8A – C View Fig ; tibia with two trichobothria; palpal tarsal organ capsulate ( Fig. 13A View Fig ) with small opening (diameter of opening 1.15 µm); procursus as in Fig. 9D – F View Fig , with large transparent ventral membrane, distinctive dorsal flap, and tip bent towards dorsal; genital bulb as in Fig. 9G – I View Fig , with simple proximal sclerite, distal sclerite short and simple, not widened in mid-section. Legs without spines and curved hairs; vertical hairs not seen in dissecting microscope but present on tibia 1 ( Fig. 13D View Fig ), apparently only one row; prolateral trichobothrium absent on tibia 1, present on other leg tibiae; metatarsi 3 and 4 with few (3 – 5) slender hairs proximally on retrolateral-ventral side ( Fig. 13E View Fig ). Gonopore with 4 – 5 epiandrous spigots ( Fig. 11E – F View Fig ); spinnerets as in female (see below).

Tibia 1 in 22 females: 0.48 – 0.58 (mean 0.54). Female chelicerae without stridulatory ridges ( Fig. 12B View Fig ). Female internal genitalia with strong median structure and membranous sac (receptacle?) ( Fig. 10C – D View Fig ); apparently with small pore plates ( Fig. 32B View Fig ). Each ALS ( Fig. 11H View Fig ) with one strongly widened spigot, one long pointed spigot, and five cylindrical spigots (of which one is much wider than the others); each PMS with two conical spigots; PLS without spigots. Leg tarsal organs with very small openings (diameters of openings 0.8 – 0.9 µm; Fig. 13B View Fig ). Metatarsi 3 and 4 with long slender hairs as in male; tarsus 4 with single prolateral comb-hair as in male.

Remarks (notes on type locality)

The type locality of this species has been confused twice. Gertsch (1982) interpreted the label information as referring to Cerro Colorado in Nuevo León, Mexico. Later, Huber (2000), read the handwritten label as “Crro Colorado, Cta., 14.X-61, Col: O. de Ferrariis”, and suggested that this referred to Cerro Colorado in the province of Catamarca (“Cta.”), Argentina, i.e. ~ 28.46° S, 65.85° W. Another interpretation for a label accompanying a specimen of the linyphiid Scolecura propinqua Millidge, 1991 collected by O. de Ferrariis on the same day, was offered by Miller (2007): Cerro Colorado in the province of Córdoba, i.e. ~ 30.10° S, 63.93° W. A new look at both labels confirms Miller’s (2007) interpretation: the label in the type vial of Guaranita munda quite clearly reads “Cba.” rather than “Cta.”, and the machinewritten label accompanying the Scolecura propinqua specimen explicitly says “Prov. Cordoba ”.

Natural history

Near Nono, the spiders were collected by turning the uppermost rocks of a stone wall in a low forest ( Fig. 34B View Fig ). The spiders started to run rapidly but did not drop from the rocks. A label accompanying specimens from Parque Nacional El Palmar suggests a very similar habitat: “piedras palmeras con pastizal y bosque bajo”. Two egg-sacs contained 6 and 7 eggs, respectively, and were carried under the prosoma; egg diameter: 0.44.

Distribution

Widely distributed in north-eastern Argentina, reaching Rio Grande do Sul ( Brazil) ( Fig. 33A View Fig ). Presumably also present in Uruguay and southern Paraguay. The single record from Jujuy ( Torres et al. 2016) appears dubious (misidentified G. yaculica ?).

MACN

Argentina, Buenos Aires, Museo Argentina de Ciencias Naturales

ZFMK

Zoologisches Forschungsmuseum Alexander Koenig

MACN

Museo Argentino de Ciencias Naturales Bernardino Rivadavia

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Pholcidae

Genus

Guaranita

Loc

Guaranita munda ( Gertsch, 1982 )

Huber, Bernhard A., Meng, Guanliang, Král, Jiří, Ávila Herrera, Ivalú M. & Izquierdo, Matías A. 2023
2023
Loc

Guaranita munda

Torres V. M. & Pardo P. L. & Gonzalez-Reyes A. X. & Rodriguez Artigas S. M. & Corronca J. A. 2016: 11
Avalos G. & Rubio G. D. & Bar M. E. & Damborsky M. P. 2006: 193
Huber B. A. 2000: 100
2000
Loc

Pholcophora munda

Gertsch W. J. 1982: 104
1982
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