Lepthercus, Purcell, 1902Lepthercus, Purcell, 1902

Ríos-Tamayo, Duniesky & Lyle, Robin, 2020, The South African genus Lepthercus Purcell, 1902 (Araneae: Mygalomorphae) phylogeny and taxonomy, Zootaxa 4766 (2), pp. 261-305 : 266-269

publication ID

https://doi.org/ 10.11646/zootaxa.4766.2.2

publication LSID

urn:lsid:zoobank.org:pub:BA570D47-FE77-446C-B000-9208C9A6E957

DOI

https://doi.org/10.5281/zenodo.3803504

persistent identifier

https://treatment.plazi.org/id/03F11B20-FFDB-FF8E-8EE8-3AF7FA4ED166

treatment provided by

Carolina

scientific name

Lepthercus Lepthercus
status

sp. nov.

Key for identification of Lepthercus spp

Males (males of Lepthercus lawrencei sp. nov. and Lepthercus filmeri sp. nov. are unknown)

1 Tibia I swollen (Group haddadi, Fig. 1 View FIGURE ).................................................................... 2

— Tibia I not swollen (Group dregei, Fig. 1 View FIGURE ).................................................................. 6

2 Tibia I spur with an associated strong spine ( Figs. 17J View FIGURE ; 19K View FIGURE ; 23J View FIGURE ); retroventral side of palpal tibia developed ( Fig. 17D, E View FIGURE ; 19E, F View FIGURE ; 23D, E View FIGURE )........................................................................................... 3

— Tibia I spur without an associated strong spine; retroventral side of palpal tibia normal.............................. 5

3 Metatarsus I without protuberance, only short setae ( Fig. 23I View FIGURE ), copulatory bulb with two keels ( Fig. 23G, H View FIGURE )............................................................................................ .. Lepthercus sofiae sp. nov.

– Metatarsus I with a protuberance covered by blunt spinules ( Fig. 17I View FIGURE , 19J View FIGURE ), copulatory bulb without keels ( Figs. 17G, H View FIGURE ; 19H, I View FIGURE ).................................................................................................. 4

4 Tibia I moderately swollen, with a prolateral megaspine near the spur ( Fig. 17J View FIGURE )........... Lepthercus engelbrechti sp. nov.

– Tibia I very swollen ( Fig. 19J, K View FIGURE ); without a prolateral megaspine near the spur.............. Lepthercus haddadi sp. nov.

5 Copulatory bulb with a developed lateral keel delimiting a concave area ( Fig. 14 View FIGURE F-H)...... Lepthercus dippenaarae sp. nov.

– Copulatory bulb with a long lateral keel, not delimiting a concave area ( Fig. 21F, G View FIGURE )..... .. Lepthercus rattrayi Hewitt, 1917 .

6 Cuticular spur long ( Figs. 5I, J View FIGURE ; 6C, D View FIGURE ; 9I, J View FIGURE ; 12I, J View FIGURE )...........................................................7

– Cuticular spur small ( Fig. 3I View FIGURE )...................................................... Lepthercus confusus sp. nov.

7 Embolus with many longitudinal keels ( Fig. 5F, H View FIGURE ); maxillary cuspules normal (as in Fig. 2B View FIGURE ).................................................................................................... Lepthercus dregei Purcell, 1902 .

– Embolus with one keel; maxillary cuspules minute (as in Fig. 2C View FIGURE )............................................... 8

8 Embolus with a small apical keel (12G).............................................. Lepthercus mandelai sp. nov.

– Embolus with a long lateral keel ( Fig. 9G, H View FIGURE )..................................... Lepthercus kwazuluensis sp. nov.

Females (female of Lepthercus sofiae sp. nov. is unknown)

1 Spermathecae tubular; without stalk ( Fig. 18D View FIGURE , 20D View FIGURE )......................................................... 2

– Spermathecae not tubular; with a stalk ( Fig. 4E View FIGURE , 7C View FIGURE , 8E View FIGURE , 10D View FIGURE , 11D, 13D, 15E, 22D)................................ 3

2 Spermathecae with a short duct ( Fig. 18D View FIGURE ), no labial cuspules......................... Lepthercus engelbrechti sp. nov.

— Spermathecae with a long duct ( Fig. 20D View FIGURE ), one labial cuspule............................. Lepthercus haddadi sp. nov.

3 Labial cuspules present................................................................................. 4

– Labial cuspules absent.................................................................................. 8

4 Few maxillary cuspules (until 60)..........................................................................5

— Many maxillary cuspules (over 80)....................................................................... 6

5 Few cheliceral denticles (15); spermathecae with a wide base ( Fig. 8E View FIGURE )....................... Lepthercus filmeri sp. nov.

– Many cheliceral denticles (28); spermathecae with a narrow base ( Fig. 22D View FIGURE )........... .. Lepthercus rattrayi Hewitt, 1917 .

6 Spermathecal base with an apical projection ( Fig. 10D View FIGURE ); stalks curved outward with oval receptacles, maxillary cuspules (100)..................................................................... Lepthercus kwazuluensis sp. nov.

— Spermathecal base without an apical projection..............................................................7

7 Many chelicerae denticles (45), spermathecae with stalk twisted inward twice, circulars receptacles ( Fig. 11D View FIGURE )........................................................................................ Lepthercus lawrencei sp. nov.

— Few chelicerae denticles (12), spermathecae with straight stalks, base domed ( Fig. 13D View FIGURE )...... Lepthercus mandelai sp. nov.

8 Spermathecal stalk attached to the posterior side of the spermathecae base, stalks straigth, curved outward with truncate receptacles ( Fig. 7C View FIGURE ), few maxillary cuspules (54)...................................... .. Lepthercus dregei Purcell, 1902 .

— Spermathecal stalk not attached to the posterior side of the spermathecae base (with a transition to the stalk), stalk twisted.. 8

9 Spermathecal receptacles irregular, stalk twisted twice ( Fig. 4E View FIGURE ), chelicerae denticles (18)...... Lepthercus confusus sp. nov.

— Spermathecae receptacles oval, stalk twisted inward once ( Fig. 15E View FIGURE ), chelicerae denticles (12)................................................................................................... Lepthercus dippenaarae sp. nov. Genus Lepthercus View Figure

http://zoobank.org/ urn:lsid:zoobank.org:act:E3F3DEC2-513B-4D9C-9F4C-06A47508996B

Lepthercus Purcell, 1902: 379 . Type species: Lepthercus dregei by original designation. Hewitt, 1917: 699. Raven, 1985a: 86.

Diagnosis. Males can be distinguished from the genera Hermacha and Entypesa , by possessing a megaspine on a raised cuticular spur on tibia I (absent in Hermacha and Entypesa ), thin prolateral spiniform setae on male palp tibia ( Figs. 3E View FIGURE , 5E View FIGURE , 9E View FIGURE , 12E View FIGURE , 14E View FIGURE , 21E View FIGURE ; thick in Hermacha and Entypesa ) and presence of a protuberance on metatarsus I of males ( Figs. 5J View FIGURE , 9J View FIGURE , 12J View FIGURE , 14J View FIGURE , 17I View FIGURE , 19J View FIGURE , 21I View FIGURE , 23I View FIGURE ; absent in Hermacha and Entypesa ). Lepthercus differs too by Hermacha , by the presence of preening combs in both sexes ( Fig. 2A View FIGURE ), and from Entypesa by the presence of a dense scopula on tarsi I-II (less dense than Hermacha ).

View Figure

Description. Fovea short, more or less straight. Clypeus narrow with some bristles on the edge. Eye tubercle raised, well defined. Usually no cuspules on labium (1–3 if present). Maxillae rectangular; anterior lobe rounded, prolateral face of females slightly curved or curved, with a short or long soft area. Serrula present in females ( Fig. 2 View FIGURE D-K); in L. engelbrechti sp. nov., L. haddadi sp. nov., and L. sofiae sp. nov., is present in both sexes. Maxillae with numerous cuspules on inner corner, not on mound (minute in males of L. kwazuluensis sp. nov., L. confusus sp. nov. and L. mandelai sp. nov.; Fig. 2C View FIGURE ). Postlabial sigilla consisting of a pair of well-marked depressions, almost meeting in the center. Sternum covered with black hairs and bristles, with posterior sigilla marginal, small and well defined. Chelicerae without rastellum. Males with a small and setose intercheliceral tumescence ( Figs. 3C View FIGURE , 5C View FIGURE , 9C View FIGURE , 12C View FIGURE , 14C View FIGURE , 17C View FIGURE , 19D View FIGURE , 21C View FIGURE , 23C View FIGURE ; absent in females).

Leg formula 4123; all legs covered with sparse hairs. Cymbium short without spines; palp tarsi of females with two basal spines. Palp tibia of males normal (Group dregei, Fig. 3D View FIGURE ) or wide, dorsally very convex (Group haddadi, Fig. 17D View FIGURE ); slender in Hermacha and Entypesa . Thin spiniform setae usually present in the prolateral side of the palp tibia of males (Figs. Figs. 3E View FIGURE , 5E View FIGURE , 9E View FIGURE , 12E View FIGURE , 14E View FIGURE , 21E View FIGURE ; absents in L. engelbrechti sp. nov., L. haddadi sp. nov., and L. sofiae sp. nov.). Palpal tibia with abundant rigid setae proventrally ( Fig. 3E View FIGURE , 5E View FIGURE , 9E View FIGURE , 12E View FIGURE , 14E View FIGURE , 21E View FIGURE ) and thin setae dorsally (thick in L. dippenaarae sp. nov. and L. rattrayi , Fig. 14D View FIGURE , 21D View FIGURE ). Males of L. engelbrechti sp. nov., L. haddadi sp. nov., and L. sofiae sp. nov. with the palp tibiae strongly incrassate, ventrally excavated and with the posterior part of the ventral excavation produced ( Fig. 17D, E View FIGURE ; 19E, F View FIGURE ; 23D, E View FIGURE ). Males with a short ( Fig. 3I View FIGURE ) or elongated cuticular spur ( Figs. 5I, J View FIGURE , 6C, D View FIGURE , 9I, J View FIGURE , 12I, J View FIGURE , 14I View FIGURE , 21I View FIGURE ), with an apical megaespine on tibiae I. Tibiae I of males can be swollen (Group haddadi) or not (Group dregei). Males of L. engelbrechti sp. nov., L. haddadi sp. nov., and L. sofiae sp. nov. present a strong spine near the base of the megaspine ( Fig. 17J View FIGURE ; 19K View FIGURE ; 23J View FIGURE ).

Metatarsus I is usually elongate and straight (Group dregei) or short and slightly bowed (Group haddadi). In the medial-basal part of the segment of all species (except L. confusus sp. nov.) a prolateral protuberance (knob) is present and covered with short, black setae (Group Dregei, Figs. 5J View FIGURE , 9J View FIGURE , 12J View FIGURE ) or in the 1/3 A of the segment covered by black and blunt spinules (Group haddadi, Figs. 14I, J View FIGURE , 17I View FIGURE , 19J View FIGURE , 21I View FIGURE , 23I View FIGURE ). Both sexes with two rows of teeth on all paired claws; third claw short, curved. Scopulae on metatarsi I-II of females dense (sparse in males) and uniformly distributed along the length of the segment (sometimes with scattered, long, thin, emergent setae); III–IV sparse (1:2 A, sometimes divided) or absent. Tarsi I–II (both sexes) with dense scopulae, uniformly distributed throughout the segment; III–IV, less dense than I–II, uniformly distributed, and divided by band of setae. Tarsal organ low, tarsi integral. Trichobothria filiform; tibia in two rows; metatarsi with one straight line, tarsi with a zigzag row along full length. Metatarsal preening combs present in both sexes on legs II–IV (e.g. Fig. 2A View FIGURE ).

Copulatory bulb pyriform, embolus relatively short and tapering with lateral keels ( Figs. 3F, G View FIGURE , 9G, H View FIGURE , 12G View FIGURE , 14 View FIGURE F–H, 21F, G) or parallel ridges ( Figs. 3F, H View FIGURE , 5F, H View FIGURE ). In the species L. engelbrechti sp. nov., L. haddadi sp. nov., and L. sofiae sp. nov. the copulatory bulb is generally smooth, with an embolus long and slightly twisted (keels present only in L. sofiae sp. nov., Fig. 23 View FIGURE G-H). Females with two separate and small spermathecae, with a small base, a thin stalk, and an oval to rounded receptaculum ( Figs. 4E View FIGURE , 7C View FIGURE , 8E View FIGURE , 10D View FIGURE , 11D, 13D, 15D, 22D) or tubular cruved and without stalk ( Figs. 18D View FIGURE , 20D View FIGURE ). Apical segment of PLS elongated.

Distribution. Western Cape, Eastern Cape, Kwazulu-Natal, Free State and Mpumalanga Provinces, South Africa ( Fig. 24 View FIGURE , 25 View FIGURE ).

Species included. Lepthercus confusus sp. nov., Lepthercus dippenaarae sp. nov., Lepthercus dregei Purcell, 1902 , Lepthercus engelbrechti sp. nov., Lepthercus filmeri sp. nov., Lepthercus haddadi sp. nov., Lepthercus kwazuluensis sp. nov., Lepthercus lawrencei sp. nov., Lepthercus mandelai sp. nov., Lepthercus rattrayi Hewitt, 1917 , Lepthercus sofiae sp. nov.

Genus Lepthercus View Figure

http://zoobank.org/ urn:lsid:zoobank.org:act:E3F3DEC2-513B-4D9C-9F4C-06A47508996B

Lepthercus Purcell, 1902: 379 . Type species: Lepthercus dregei by original designation. Hewitt, 1917: 699. Raven, 1985a: 86.

Diagnosis. Males can be distinguished from the genera Hermacha and Entypesa , by possessing a megaspine on a raised cuticular spur on tibia I (absent in Hermacha and Entypesa ), thin prolateral spiniform setae on male palp tibia ( Figs. 3E View FIGURE , 5E View FIGURE , 9E View FIGURE , 12E View FIGURE , 14E View FIGURE , 21E View FIGURE ; thick in Hermacha and Entypesa ) and presence of a protuberance on metatarsus I of males ( Figs. 5J View FIGURE , 9J View FIGURE , 12J View FIGURE , 14J View FIGURE , 17I View FIGURE , 19J View FIGURE , 21I View FIGURE , 23I View FIGURE ; absent in Hermacha and Entypesa ). Lepthercus differs too by Hermacha , by the presence of preening combs in both sexes ( Fig. 2A View FIGURE ), and from Entypesa by the presence of a dense scopula on tarsi I-II (less dense than Hermacha ).

View Figure

Description. Fovea short, more or less straight. Clypeus narrow with some bristles on the edge. Eye tubercle raised, well defined. Usually no cuspules on labium (1–3 if present). Maxillae rectangular; anterior lobe rounded, prolateral face of females slightly curved or curved, with a short or long soft area. Serrula present in females ( Fig. 2 View FIGURE D-K); in L. engelbrechti sp. nov., L. haddadi sp. nov., and L. sofiae sp. nov., is present in both sexes. Maxillae with numerous cuspules on inner corner, not on mound (minute in males of L. kwazuluensis sp. nov., L. confusus sp. nov. and L. mandelai sp. nov.; Fig. 2C View FIGURE ). Postlabial sigilla consisting of a pair of well-marked depressions, almost meeting in the center. Sternum covered with black hairs and bristles, with posterior sigilla marginal, small and well defined. Chelicerae without rastellum. Males with a small and setose intercheliceral tumescence ( Figs. 3C View FIGURE , 5C View FIGURE , 9C View FIGURE , 12C View FIGURE , 14C View FIGURE , 17C View FIGURE , 19D View FIGURE , 21C View FIGURE , 23C View FIGURE ; absent in females).

Leg formula 4123; all legs covered with sparse hairs. Cymbium short without spines; palp tarsi of females with two basal spines. Palp tibia of males normal (Group dregei, Fig. 3D View FIGURE ) or wide, dorsally very convex (Group haddadi, Fig. 17D View FIGURE ); slender in Hermacha and Entypesa . Thin spiniform setae usually present in the prolateral side of the palp tibia of males (Figs. Figs. 3E View FIGURE , 5E View FIGURE , 9E View FIGURE , 12E View FIGURE , 14E View FIGURE , 21E View FIGURE ; absents in L. engelbrechti sp. nov., L. haddadi sp. nov., and L. sofiae sp. nov.). Palpal tibia with abundant rigid setae proventrally ( Fig. 3E View FIGURE , 5E View FIGURE , 9E View FIGURE , 12E View FIGURE , 14E View FIGURE , 21E View FIGURE ) and thin setae dorsally (thick in L. dippenaarae sp. nov. and L. rattrayi , Fig. 14D View FIGURE , 21D View FIGURE ). Males of L. engelbrechti sp. nov., L. haddadi sp. nov., and L. sofiae sp. nov. with the palp tibiae strongly incrassate, ventrally excavated and with the posterior part of the ventral excavation produced ( Fig. 17D, E View FIGURE ; 19E, F View FIGURE ; 23D, E View FIGURE ). Males with a short ( Fig. 3I View FIGURE ) or elongated cuticular spur ( Figs. 5I, J View FIGURE , 6C, D View FIGURE , 9I, J View FIGURE , 12I, J View FIGURE , 14I View FIGURE , 21I View FIGURE ), with an apical megaespine on tibiae I. Tibiae I of males can be swollen (Group haddadi) or not (Group dregei). Males of L. engelbrechti sp. nov., L. haddadi sp. nov., and L. sofiae sp. nov. present a strong spine near the base of the megaspine ( Fig. 17J View FIGURE ; 19K View FIGURE ; 23J View FIGURE ).

Metatarsus I is usually elongate and straight (Group dregei) or short and slightly bowed (Group haddadi). In the medial-basal part of the segment of all species (except L. confusus sp. nov.) a prolateral protuberance (knob) is present and covered with short, black setae (Group Dregei, Figs. 5J View FIGURE , 9J View FIGURE , 12J View FIGURE ) or in the 1/3 A of the segment covered by black and blunt spinules (Group haddadi, Figs. 14I, J View FIGURE , 17I View FIGURE , 19J View FIGURE , 21I View FIGURE , 23I View FIGURE ). Both sexes with two rows of teeth on all paired claws; third claw short, curved. Scopulae on metatarsi I-II of females dense (sparse in males) and uniformly distributed along the length of the segment (sometimes with scattered, long, thin, emergent setae); III–IV sparse (1:2 A, sometimes divided) or absent. Tarsi I–II (both sexes) with dense scopulae, uniformly distributed throughout the segment; III–IV, less dense than I–II, uniformly distributed, and divided by band of setae. Tarsal organ low, tarsi integral. Trichobothria filiform; tibia in two rows; metatarsi with one straight line, tarsi with a zigzag row along full length. Metatarsal preening combs present in both sexes on legs II–IV (e.g. Fig. 2A View FIGURE ).

Copulatory bulb pyriform, embolus relatively short and tapering with lateral keels ( Figs. 3F, G View FIGURE , 9G, H View FIGURE , 12G View FIGURE , 14 View FIGURE F–H, 21F, G) or parallel ridges ( Figs. 3F, H View FIGURE , 5F, H View FIGURE ). In the species L. engelbrechti sp. nov., L. haddadi sp. nov., and L. sofiae sp. nov. the copulatory bulb is generally smooth, with an embolus long and slightly twisted (keels present only in L. sofiae sp. nov., Fig. 23 View FIGURE G-H). Females with two separate and small spermathecae, with a small base, a thin stalk, and an oval to rounded receptaculum ( Figs. 4E View FIGURE , 7C View FIGURE , 8E View FIGURE , 10D View FIGURE , 11D, 13D, 15D, 22D) or tubular cruved and without stalk ( Figs. 18D View FIGURE , 20D View FIGURE ). Apical segment of PLS elongated.

Distribution. Western Cape, Eastern Cape, Kwazulu-Natal, Free State and Mpumalanga Provinces, South Africa ( Fig. 24 View FIGURE , 25 View FIGURE ).

Species included. Lepthercus confusus sp. nov., Lepthercus dippenaarae sp. nov., Lepthercus dregei Purcell, 1902 , Lepthercus engelbrechti sp. nov., Lepthercus filmeri sp. nov., Lepthercus haddadi sp. nov., Lepthercus kwazuluensis sp. nov., Lepthercus lawrencei sp. nov., Lepthercus mandelai sp. nov., Lepthercus rattrayi Hewitt, 1917 , Lepthercus sofiae sp. nov.

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Nemesiidae

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Nemesiidae

Loc

Lepthercus Lepthercus

Ríos-Tamayo, Duniesky & Lyle, Robin 2020
2020
Loc

Lepthercus

Raven, R. J. 1985: 86
Hewitt, J. 1917: 699
Purcell, W. F. 1902: 379
1902