Apochinomma malkini, Haddad, 2013

Haddad, Charles Richard, 2013, A revision of the ant-like sac spider genus Apochinomma Pavesi 1881 (Araneae: Corinnidae) in the Afrotropical Region, Journal of Natural History 47 (39 - 40), pp. 2493-2529: 2510-2514

publication ID

http://doi.org/ 10.1080/00222933.2013.791933

persistent identifier

http://treatment.plazi.org/id/6C3FB178-FFE5-FFC8-FE20-0308FD8502CF

treatment provided by

Felipe

scientific name

Apochinomma malkini
status

sp. nov.

Apochinomma malkini   sp. nov.

( Figures 2C, D View Figure 2 , 3C, D View Figure 3 , 9B View Figure 9 , 12A–D View Figure 12 )

Etymology

This species is named for Borys Malkin in recognition of his valuable collections of spiders made throughout tropical Africa, including the types of this species.

Diagnosis

The species is easily recognized by the broadened embolus of the males with the tip directed distally and retrolaterally ( Figures 9B View Figure 9 , 12A View Figure 12 ), and by the broad coiled

comma-shaped ridges surrounding the copulatory openings in the female epigyne ( Figure 12C View Figure 12 ).

Remark

The abdomen of the female paratype is separated from the carapace, and the total length provided here is an approximation based on the sum of the carapace and abdomen lengths, not including possible extension of the pedicel.

Male (holotype, Iseri, CAS). Measurements: CL 3.60, CW 1.80, AL 3.75, AW 1.89, TL 7.35, FL 0.20, SL 1.50, SW 1.03, AME–AME 0.11, AME–ALE 0.05, ALE–ALE 0.52, PME–PME 0.24, PME–PLE 0.21, PLE–PLE 0.92, PERW 1.06, MOQAW 0.43, MOQPW 0.46, MOQL 0.37.

Length of leg segments: I 2.40 + 0.63 + 2.55 + 2.27 + 1.45 = 9.30; II 2.31 + 0.60 + 2.24 + 2.10 + 1.30 = 8.55; III 2.00 + 0.65 + 1.80 + 1.97 + 0.98 = 7.40; IV 2.84 + 0.73 + 2.43 + 2.97 + 1.20 = 10.17.

General appearance in Figure 2C View Figure 2 , lateral view in Figure 3C View Figure 3 . Carapace elongate oval, eye region broad, tapering posteriorly to pedicel, broadest at coxa II; raised gently from eye region, with median depression, highest at two-thirds carapace length ( Figure 3C View Figure 3 ); surface finely granulate, covered in white feathery setae, with scattered short straight setae in eye region and on clypeus; fovea short, narrow, at two-thirds carapace length; carapace deep orange-brown, with distinct black striae and black mottling, eye region slightly darker between anterior eyes. All eyes with black rings; AER straight, medians larger than laterals; AME separated by distance equal to three-fifths their diameter; AME separated from ALE by distance slightly larger than half ALE diameter; clypeus height equal to one and one-sixth times AME diameter; PER strongly recurved, medians very slightly larger than laterals; PME separated by distance equal to twice their diameter; PME separated from PLE by distance slightly less than twice PME diameter; CW: PERW = 1.70: 1. Chelicerae orange-brown, with scattered erect straight setae on anterior surface; three teeth on promargin, distal tooth smallest, tiny, median tooth largest; median and distal teeth closer to each other than to proximal tooth; retromargin with two slightly separated teeth close to fang base, distal tooth slightly smaller than proximal tooth; endites orange-brown, cream at maxillar hair tuft; labium orange-brown, cream distally; sternum shield-shaped, elongate, orange-brown with faint brown mottling; surface finely granulate, densely covered in white short straight setae, with scattered white feathery and long erect straight setae. Legs with surface of all segments except tarsi finely granulate, tarsi finely wrinkled; legs covered in short straight setae, feathery setae dense on dorsal surface of femora, sparse on other segments, absent on tarsi; femora I and II yellow, with prolateral and retrolateral black stripes, black proximally; femora III and IV dark brown, with prolateral and retrolateral black stripes, yellow at distal end dorsally; patellae I and II yellow with faint prolateral and retrolateral black mottling; patellae III and IV yellow, with broad black proximal and distal markings, narrowly linked with prolateral and retrolateral black mottling; tibiae, metatarsi and tarsi I and II yellow with black mottling; tibiae III and IV dark brown with black mottling, yellow dorsally at distal end of tibiae IV; metatarsi III yellow with black mottling; metatarsi IV dark brown, yellow dorsally at distal end; tarsi III and IV yellow with faint black mottling. Leg spination: femora: I pl 2 do 3, II pl 2 do 3, III pl 2 do 3 rl 2, IV pl 2 do 3 rl 2; patellae: all without distal do seta or spine; tibiae: I plv 2 rlv 2, II plv 2 rlv 2, III pl 2 rl 2 plv 2 rlv 2 vt 2, IV pl 2 rl 2 plv 2 rlv 1 vt 2; metatarsi: I plv 2 rlv 2, II plv 2 rlv 2, III pl 3 rl 3 plv 2 rlv 2 vt 3, IV pl 3 rl 3 plv 2 rlv 2 vt 3. Palpal spination: femora: do 2; patellae: pl 1 do 1; tibiae: pl 1 plv 1; tarsi: plv 2. Abdomen pear-shaped, broad and round posteriorly, with long pedicel; dorsal scutum dark red-brown with black mottling, nearly covering entire dorsum, fused to pedicel anteriorly and epigastric plate and post-epigastric sclerites ventrally; sigilla indistinct; narrow mottled dark grey unsclerotized section present behind scutum above spinnerets; dorsum sparsely covered in white feathery setae; venter mottled dark grey, covered in short straight black setae, with scattered white feathery setae behind epigastric furrow, extending halfway to spinnerets; venter with red-brown rectangular ventral sclerite with black mottling, with single paired row of tiny sclerites continuous with lateral margin of ventral sclerite; inframamillary sclerite yellow-brown, subtriangular. Male palpal segments yellow-brown with faint black mottling; tegulum pear-shaped, creamy-yellow, with dark red-brown insemination ducts; embolus short, with single coil, basal section broad and slightly curved; embolus tip broadened, slightly curved, directed retrolaterally and distally ( Figures 9B View Figure 9 , 12A, B View Figure 12 ).

Female (paratype, Iseri, CAS). Measurements: CL 4.39, CW 2.18, AL 4.60, AW 2.80, TL ∼9.00, FL 0.21, SL 1.83, SW 1.15, AME–AME 0.13, AME–ALE 0.06, ALE– ALE 0.59, PME–PME 0.26, PME–PLE 0.29, PLE–PLE 1.06, PERW 1.25, MOQAW 0.49, MOQPW 0.54, MOQL 0.46.

Length of leg segments: I 2.78 + 0.80 + 2.93 + 2.45 + 1.50 = 10.46; II 2.75 + 0.78 + 2.65 + 2.35 + 1.45 = 9.98; III 2.40 + 0.85 + 2.15 + 2.23 + 1.10 = 8.73; IV 3.40 + 0.93 + 2.90 + 3.35 + 1.23 = 11.81.

General appearance in Figure 2D View Figure 2 , lateral view in Figure 3D View Figure 3 . Morphology as for male except the following: AER straight, medians larger than laterals; AME separated by distance equal to two-thirds their diameter; AME separated from ALE by distance slightly less than one-third AME diameter; clypeus height equal to one and one-sixth times AME diameter; PER strongly recurved, medians very slightly larger than laterals; PME separated by distance equal to one and two-thirds times their diameter; PME separated from PLE by distance equal to twice the PME diameter; CW: PERW = 1.74: 1. Leg spination: femora: I pl 2 do 3, II pl 1 do 3, III pl 2 do 3 rl 2, IV pl 2 do 3 rl 1; patellae: all without distal do seta or spine; tibiae: I plv 2 rlv 2, II plv 2 rlv 2, III pl 2 rl 2 plv 2 rlv 1 vt 2, IV pl 2 rl 2 plv 2 rlv 2 vt 2; metatarsi: I plv 2 rlv 2, II plv 2 rlv 2, III pl 3 rl 3 plv 2 rlv 2 vt 3, IV pl 3 rl 3 plv 2 rlv 2 vt 3. Palpal spination: femora: do 1; patellae: do 1; tibiae: pl 1 do 1 plv 1; tarsi: pl 1 rl 1 plv 2. Abdomen teardrop-shaped with long pedicel, with red-brown dorsal scutum extending slightly passed midpoint; posterior half of dorsum mottled dark grey with small cream spots; sigilla indistinct; dorsum covered with white short straight and feathery setae; venter pale creamy-grey, with two paired rows of tiny sclerites from epigastric furrow to spinnerets; epigastric region strongly sclerotized, post-epigastric sclerites weakly sclerotized; ventral sclerite absent; inframamillary sclerite distinct, red-brown; ventral setae pale, short and straight. Epigyne with broad coiled comma-shaped ridges with lateral copulatory openings at midpoint of epigyne ( Figure 12C View Figure 12 ); copulatory ducts short, oblique, entering round anterior ST II posterolaterally; ST II broadly connected to diverging posterior ST I ( Figure 12D View Figure 12 ).

Type material

Holotype ♂: NIGERIA: Lagos State, Iseri (Isheri, 06 ◦ 38’ N, 03 ◦ 23’ E), leg. B. Malkin, 27–30 December 1948 ( CAS, CASENT 9033081). GoogleMaps  

Paratype: Same data as holotype, 1♀ ( CAS, CASENT 9033102) GoogleMaps   .

Additional material examined

None.

Distribution

Known from the type locality ( Figure 16 View Figure 16 ).

Biology

Collected from forest in southern Nigeria.

CAS

California Academy of Sciences