Megalostrata monistica ( Chamberlin, 1924 )

Bonaldo, Alexandre B., Galán-Sanchez, M. Antonio & García, Fabián, 2024, Advances on the taxonomy of Megalostrata Karsch, 1880 (Araneae, Corinnidae, Corinninae), with descriptions of two new species, Zootaxa 5458 (4), pp. 495-523 : 507-509

publication ID

https://doi.org/ 10.11646/zootaxa.5458.4.2

publication LSID

lsid:zoobank.org:pub:63B55CBA-8E31-4834-B43F-2BB8994BA956

DOI

https://doi.org/10.5281/zenodo.11991301

persistent identifier

https://treatment.plazi.org/id/DA2B87EE-5763-FFAD-FF4F-2A11C4FCFAF5

treatment provided by

Plazi

scientific name

Megalostrata monistica ( Chamberlin, 1924 )
status

 

Megalostrata monistica ( Chamberlin, 1924) View in CoL

Figs 10–13 View FIGURE 10 View FIGURE 11 View FIGURE 12 View FIGURE 13

Chemmis monisticus Chamberlin, 1924: 667 , fig. 111 (♀ holotype Hermosillo   GoogleMaps , San Pedro Bay Sonora, Mexico [28°04’01.2”N 111°14’34.8”W], leg. J.C. Chamberlin, 7.VII.1921, CAS 1451 About CAS ). Examined by photos.

Megalostrata monistica View in CoL ; Bonaldo 2000: 118 (by genus synonymy).

Diagnosis. Females of M. monistica are similar to those of M. paludosa spec. nov. and M. bruneri by the short, bulbous secondary spermathecae ( Figs 14C View FIGURE 14 , 22C, E View FIGURE 22 ) but can be readily recognized by the wide copulatory openings directed posteriorly, toward the posterior atrium, leading to long, curved copulatory ducts, and by the posterior margin of the epigynal plate with an accentuated median invagination ( Figs 12A, B View FIGURE 12 , 13A–D View FIGURE 13 ).

Description. Male. Unknown. Female (CAS 9119037): Carapace yellowish-orange, cephalic region with two wide, undefined reddish-brown stripes. Chelicerae, labium, and endites reddish-brown. Sternum yellowish-white. Legs yellowish-orange. Abdomen dorsum yellowish-white. Total length 9.350. Carapace 4.338 long, 3.407 wide. Clypeus height 0.200. Eye diameters:AME 0.278, ALE 0.251, PME 0.213, PLE 0.194. Interocular distances: AME-AME 0.247, AME-ALE 0.198, PME-PME 0.259, PME-PLE 0.284 ALE-PLE 0.065. Chelicerae 1.831 long, 0.929 wide, with three promarginal and two retromarginal teeth, Sternum 2.087 long, 2.025 wide. Leg measurements: I—4.494, 1.655, 3.147, 3.174, 1.377, 13.847; II—4.614, 1.655, 3.147, 3.174, 1.220, 13.810; III—3.648, 1.138, 3.360, 3.722, 1.483, 13.351; IV—4.118, 1.646, 3.639, 4.661, 0.765, 14.829. Leg spination: I—femur d1-2-2, p0- 1-0; tibia p1-1, r1-1; metatarsus v1-1-1-1-1. II—femur d1-2-2; tibia p1-1, r1-1; metatarsus v1-1-1-1-1. III—femur d1-1-1, p0-1-1; tibia p1-1; metatarsus d2-2-2, v1-1-1, p1-1-1, r1-1-1. IV—femur v0, d2-1-1-1, r1-1; tibia p1-1, r1-1; metatarsus d2-2-0, r1-1. Abdomen 5.012 long, 1.946 wide. Epigynum. Epigynal plate subtriangular, anterior portion convex, posterior atrium borders ill-defined, transversal anterior ridge absent; posterior margin of epigynal plate with accentuated median invagination; margin of posterior plate excavation strongly procurved in posterior view, copulatory openings large. Copulatory ducts long, curved anteriorly; secondary spermathecae small, bulbous; primary spermathecae globular, positioned posteriorly to copulatory openings, diameter smaller than atrium height; fertilization ducts directed anteriorly ( Figs 12 View FIGURE 12 , 13 View FIGURE 13 ).

New record. MEXICO: Nayarit: 15 km N of Peñas [21°51’32.4”N 105°11’49.2”W], leg. E. S. Ross, 26.XI.1948, 1 ♀ ( CAS 9119037 About CAS ) GoogleMaps .

Distribution. Mexican west coast (Sonora and Nayarit) ( Fig. 25 View FIGURE 25 ).

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Corinnidae

Genus

Megalostrata

Loc

Megalostrata monistica ( Chamberlin, 1924 )

Bonaldo, Alexandre B., Galán-Sanchez, M. Antonio & García, Fabián 2024
2024
Loc

Megalostrata monistica

Bonaldo, A. B. 2000: 118
2000
Loc

Chemmis monisticus

Chamberlin, R. V. 1924: 667
1924
GBIF Dataset (for parent article) Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF