Orthobula calceata Simon, 1897

Haddad, Charles R., Jin, Chi & Platnick, Norman I., 2022, A revision of the spider genus Orthobula Simon, 1897 (Araneae: Trachelidae) in the Afrotropical Region. I. Continental species, Zootaxa 5133 (3), pp. 355-382 : 367-370

publication ID

https://doi.org/10.11646/zootaxa.5133.3.3

publication LSID

lsid:zoobank.org:pub:44C7B333-7D3E-4235-A158-60E70849ED60

DOI

https://doi.org/10.5281/zenodo.6522687

persistent identifier

https://treatment.plazi.org/id/AE2487D1-B520-FF40-52DF-931AC9F4FD6C

treatment provided by

Plazi

scientific name

Orthobula calceata Simon, 1897
status

 

Orthobula calceata Simon, 1897

Figs 5, 6 View FIGURES 1–12 , 65–75 View FIGURES 65–69 View FIGURES 70–81

Orthobula calceata Simon, 1897b: 499 (Holotype ♀: SIERRA LEONE: leg. Mocquerys, deposited in MNHN—examined). Orthobula calceata Ramírez, 2014: 212 , figs 140E, 165E–F, 180A.

Diagnosis. Females of O. calceata have a similar general epigyne structure to those of O. radiata , but can be distinguished by the curved anterolateral ridges flanking the CO and the very narrow separation of the ST I and SBB ( Fig. 65 View FIGURES 65–69 ), with the ridges replaced by shallow depressions, and the ST I and SBB separated by approximately ½ SBB diameter, in O. radiata ( Figs 45 View FIGURES 45–53 , 96 View FIGURES 96–100 ). Males of O. calceata most closely resemble those of O. aethiopica sp. nov. in their palpal structure, particularly the slight undulation of the embolus in ventral view ( Figs 57 View FIGURES 54–58 , 68 View FIGURES 65–69 ), but can be distinguished by the shape of the RFA, which is short and hook-shaped in O. calceata ( Fig. 69 View FIGURES 65–69 ) but longer and bifid in O. aethiopica sp. nov. ( Fig. 58 View FIGURES 54–58 ).

Female (Badenou, ZFMK 8947). Measurements: CL 0.93, CW 0.71,AL 1.09,AW 0.99, TL 2.08 (1.60–2.25), PERW 0.29, MOQAW 0.13, MOQPW 0.17, MOQL 0.16. Length of leg segments: I 0.63 + 0.24 + 0.56 + 0.50 + 0.27 = 2.20; II 0.54 + 0.22 + 0.44 + 0.40 + 0.27 = 1.87; III 0.43 + 0.21 + 0.34 + 0.37 + 0.25 = 1.60; IV 0.60 + 0.22 + 0.53 + 0.59 + 0.29 = 2.23.

Colour: carapace bright yellow-orange, with black mottling around margins and sides, black mottled patch centrally; chelicerae yellow-brown; endites and labium yellow-brown, cream distally; sternum yellow-orange, with black mottled margins; palps yellow, tibiae with black mottling prolaterally and dorsally; legs with femora, patellae and tibiae orange-brown, with dense black mottling laterally; distal ends of anterior femora and tibiae, and proximal ends of patellae, with yellow rings; posterior femora, patellae and tibiae yellow, with pro- and retrolateral mottled markings in distal half of femora, only retrolaterally on patellae and tibiae; all metatarsi yellow, tarsi creamy-yellow; abdomen grey dorsally, with pair of longitudinal cream anterolateral patches and paired cream transverse patches at midpoint, merging in square medially; faint cream patch above spinnerets; venter cream, with small mottled grey patch in front of spinnerets; spinnerets cream.

Leg spination: femora and patellae: spineless; tibiae: I plv 6 rlv 5, II plv 4 rlv 4; metatarsi: I plv 4 rlv 4, II plv 4 rlv 4; tarsi: I plv 3 rlv 2, II plv 2 rlv 2.

Epigyne with lateral CO in curved anterolateral ridges ( Fig. 65 View FIGURES 65–69 ); CO initially curving posteromesally, then bending sharply and diverging slightly before entering round SBB at centre of epigyne; SBB almost touching along their mesal surfaces, also almost touching anterior surface of ST I; CD approximately 1½ times width of SBB; BU ovoid, wrinkled, with finger-shaped accessory gland on their anteromesal surface; SBB connected to ST I by very short looping ducts, entering transversely oval ST I on their anteromesal surface ( Fig. 66 View FIGURES 65–69 ).

Male (Bagoé River, ZFMK 8962). Measurements: CL 0.80, CW 0.63, AL 0.82, AW 0.61, TL 1.70 (1.30–1.70), PERW 0.28, MOQAW 0.11, MOQPW 0.15, MOQL 0.14. Length of leg segments: I 0.52 + 0.21 + 0.48 + 0.40 + 0.26 = 1.87; II 0.46 + 0.19 + 0.38 + 0.33 + 0.25 = 1.61; III 0.40 + 0.17 + 0.27 + 0.30 + 0.21 = 1.35; IV 0.51 + 0.25 + 0.44 + 0.46 + 0.27 = 1.93.

Colour: carapace yellow-orange with dense black mottling around margins and on sides, with distinct patch centrally; chelicerae yellow-orange; endites and labium yellow-orange, cream distally, proximal half of labium with black mottling; sternum yellow-orange, margins darker, with dense black mottling around margins; palps yellowbrown; legs yellow, anterior femora slightly darker; anterior femora with distal mottled patches laterally, patellae and tibiae with black mottling dorsally and laterally; posterior femora with distal mottled patch retrolaterally, extending as stripe along patellae and tibiae; abdomen black dorsally, with pair of cream oval anterolateral markings and transverse cream band at midpoint, latter expanded medially along anterior side; venter cream, epigastric plate with dense mottling laterally; lateral grey colouration extending as ring around spinnerets.

Leg spination: femora and patellae: spineless; tibiae: I plv 6 rlv 5, II plv 4 rlv 3; metatarsi: I plv 4 rlv 4, II plv 4 rlv 3; tarsi: I plv 3 rlv 3, II plv 3 rlv 2.

Palpal femur with small hook-shaped RFA ( Figs 67, 69 View FIGURES 65–69 ); tibia with small, simple triangular apophysis; retrodistal tegular ridge weakly developed, only curving slightly to ventral surface, not close to base of embolus ( Fig. 68 View FIGURES 65–69 ); embolus narrow, undulating slightly in ventral view, with weak curve at half its length ( Figs 67–69 View FIGURES 65–69 ).

Other material examined. CAMEROON: Adamaoua : ca. 20 km S Minim, 06°49’N, 12°52’E, 1200 m a.s.l., III.1981, leg. W. Flacke & P. Nagel, 1♀ ( ZFMK 10429 View Materials ) GoogleMaps ; Same locality, XI–XII.1980, leg. W. Flacke & P. Nagel, 1♂ ( ZFMK 10445 View Materials ) ; Tchabal Mbabo , SW slope, 07°25’N, 12°49’E, 1600 m a.s.l., 10.IV.1983, leg. R. Bosmans & Van Stalle (sweeping, transition between gallery forest and grassland), 1♂ ( MRAC 162251 View Materials ) GoogleMaps . Northwest: Mount Oku , 06°15’N, 10°26’E, 8.III.1983, 2350 m a.s.l., leg. R. Bosmans & Van Stalle (pitfalls), 1♂ ( MRAC 162239 View Materials ) GoogleMaps ; Ndop plateau, near Koutoupi, W slope, Massif de Mbam , 05°54’N, 10°44’E, 31.III.1983, 1100 m a.s.l., leg. R. Bosmans & Van Stalle (forest litter), 1♂ ( MRAC 162210 View Materials ) GoogleMaps . COTE D’IVOIRE: Gôh-Djiboua: Gagnoa [06°08’N, 05°57’W], 26.VI.1996, leg. A. Russell-Smith (pitfall, upland rice), 1♂ 1♀ ( BMNH) GoogleMaps . Lacs: Kossou , 06°57’N, 04°58’W, 24.XII.1974, leg. R. Jocqué (savanna), 1♂ ( MRAC 152488 View Materials ) GoogleMaps . Savanes: Bagoé / Guingéréni , 09°32’N, 06°36’W, 14.II–13.III.1983, leg. Fliedner & Krüger, 3 imm. 4♂ 4♀ ( ZFMK 8945 View Materials ) GoogleMaps ; Same locality, 14.II–13.III.1983, leg. Krüger & Summkeller (BF), 1 imm. 11♂ 4♀ ( ZFMK 8971 View Materials ) ; Same locality, 18.II–13.III.1983, leg. Krüger & Summkeller (BF/GW), 5♂ ( ZFMK 8972 View Materials ) ; Same locality, 21.II.1983, Krüger & Sumkeller (wasser bis 15:30), 1♂ ( ZFMK 8962 View Materials ) ; Same locality, III–IV.1984, leg. Krüger & Petermann (BF 1 GwD+P), 12♂ 2♀ ( ZFMK 8974 View Materials ) ; Same locality, 6–19.III.1984, leg. Krüger & Petermann, 1♂ ( ZFMK 8939 View Materials ) ; Same locality, 6–19.III.1984, leg. Krüger & Petermann (BF 6 Gw), 3♂ 2♀ ( ZFMK 8948 View Materials ) ; Near Korhogo , 09°27’N, 05°38’W, I.1980, leg. J. Everts (pitfalls, gallery forest), 1♂ 1♀ ( MRAC 169841 View Materials ) GoogleMaps ; Same data but II.1980, 2♂ 1♀ ( MRAC 169.839 View Materials ) ; Same data but III.1980, 1♂ 1♀ ( MRAC 169840 View Materials ) ; Same data but V.1980, 3♀ ( MRAC 169843 View Materials ) ; Riv. Badeni / Tawara , 25 km N, 09°52’N, 05°39’W, 24.I–11.II.1983, leg. Krüger & Summkeller, 2 imm. 1♂ 1♀ ( ZFMK 8951 View Materials ) GoogleMaps ; Riv. Badenou /M’bengué, 09°50’N, 05°50’W, 19.XI–9.XII.1984, leg. Krüger & Sumkeller (BF), 1♀ ( ZFMK 8987 View Materials ) GoogleMaps ; Same locality, 7.XI–18.XII.1982, leg. Dister, Huschens & Sumkeller (FH), 4 imm. 3♂ 3♀ ( ZFMK 8959 View Materials ) ; Same locality, XI.1983, leg. R. Summkeller (oben), 1♂ 1♀ ( ZFMK 8947 View Materials ) ; Same locality, XII.1983, leg. R. Summkeller (hang quer), 2♂ ( ZFMK 8949 View Materials ) ; Same locality, XI–XII.1983, leg. G. Rosner & R. Summkeller, 1 imm. 1♀ ( ZFMK 8997 View Materials ) , 2♀ ( ZFMK 8961 View Materials ) . Sassandra-Marahoué: Bouaflé, Klébo , 06°52’N, 06°08’W, I.1981, leg. J. Everts (pitfall), 1♂ ( MRAC 166405 View Materials ) GoogleMaps ; Same data but II.1981, 1♂ 1♀ ( MRAC 166385 View Materials ) . Vallée du Bandama: Bouaké [07°42’N, 05°02’W], 9.XI.1995, leg. A. Russell-Smith (rice, pitfalls, WARDA), 3♂ 5♀ ( BMNH) GoogleMaps . Woroba: Touba [08°17’N, 07°41’W], 24.VIII.1995, leg. A. Russell-Smith (pitfall, rice), 1♂ ( BMNH) GoogleMaps . D.R. CONGO: Équateur: Mabali, Bikoro District , 00°53’S, 18°07’E, X.1959, leg. N. Leleup, 1♀ ( MRAC 114565 View Materials ) GoogleMaps . EQUATORIAL GUINEA: Kié-Ntem: Micomeseng , 02°08’N, 10°37’E, 13–17.VII.1989, leg. M. Alderweireldt (pitfall, field), 1♀ ( MRAC 170228 View Materials ) GoogleMaps . GHANA: Greater Accra: Achimota [05°37’N, 00°13’W], V.1961, leg. C. Hinckley (on outside and in house), 1♀ ( MCZ 16418 View Materials ) GoogleMaps . NIGERIA: Kwara: Borgu Game Reserve , 10°15’N, 04°10’E, 5–6.VIII.1973, leg. A. Russell-Smith (flood debris on river bank), 1♀ ( MRAC 160343 View Materials ) GoogleMaps .

Habitat and biology. A common ground-dwelling spider sampled from pitfalls and litter in various forest and savanna habitats.

Distribution. Widespread in West Africa and the western parts of the Congo Basin ( Fig. 82 View FIGURE 82 ); largely sympatric with O. marusiki sp. nov. ( Fig. 101 View FIGURE 101 ) and often collected together in the same samples.

Variation. All of the examined O. calceata examined have some abdominal markings in both sexes, with the majority of specimens showing “complete” markings ( Figs 72, 75 View FIGURES 70–81 ), and only a few individuals of each sex a reduction in their extent (e.g. Figs 70, 71, 73, 74 View FIGURES 70–81 ).

MCZ

Museum of Comparative Zoology

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Trachelidae

Genus

Orthobula

Loc

Orthobula calceata Simon, 1897

Haddad, Charles R., Jin, Chi & Platnick, Norman I. 2022
2022
Loc

Orthobula calceata

Ramirez, M. J. 2014: 212
Simon, E. 1897: 499
1897