Kryptochroma hilaris Machado & Teixeira, 2021

Machado, Miguel, Viecelli, Rafaela, Guzati, Catherine, Grismado, Cristian J. & Teixeira, Renato A., 2021, Kryptochroma: a new genus of bark-dwelling crab spiders (Araneae, Thomisidae), European Journal of Taxonomy 778, pp. 26-70 : 34-37

Kryptochroma hilaris Machado & Teixeira gen. et sp. nov.

urn:lsid:zoobank.org:act:803AFFBD-9E9F-41B4-948D-2C427AFBD9B5

Figs 4–5 , 9 , 20B, 21B

Diagnosis

The male of K. hilaris gen. et sp. nov. has a body coloration that resemble that of K. parahybana . However, it can be distinguished by the stouter, shorter and round embolus, which points retro-ventrally ( Figs 5C, E , 20B ). The most striking differences between K. hilaris gen. et sp. nov. and other species of the genus are the discrete MS on prosoma, that is more like an median elevation on the thoracic area (absent in males), and the number of ventral macrosetae on tibiae I and II: while other species have four pairs on each leg for both sexes, in K. hilaris sp. nov. the females bear six ventral macrosetae on tibia I ( Fig. 4A ) while males present only five ( Fig. 5A ). Females can also be distinguished by the presence of two anterolateral and one median depression on the epigynal plate and by the copulatory openings located in a demilune-shaped concavity delimited by the posterior folds of the tegument ( Figs 4C, E , 21B).

Etymology

The specific name – a Latin adjective that means cheerful – is a reference to the shape of the posterior fold of the epigynal plate, which resembles a smiling face ( Figs 4C–F , 21B).

Material examined

Holotype BRAZIL • ♀; Amazonas , Coari , Porto Urucu, Base de Operações Geólogo Pedro de Moura; 04°48′41″ S, 65°02′01″ W; Jul. 2006; S.C. Dias leg.; MPEG 13322 .

Paratypes BRAZIL • 1 ♀; same collection data as for holotype; Sep.–Nov. 2006; N.F. Lo Man Hung leg.; MCTP 42643 • 1 ♀; same collection data as for holotype; 13 Jul. 2003; D. Guimarães leg.; MCTP 42642 • 1 ♀; same collection data as for holotype; Sep. 2006; C.A.C. Santos Jr. leg.; MPEG 13311 .

Additional material

BRAZIL – Amazonas State • 1 ♀; Tefé; 03°21′14″ S, 64°42′39″ W; Nov. 1919; H.S. Parrish leg.; MCZ • 1 ♂; Coari ; 04°51′35″ S, 65°06′17″ W; Sep. 2006; C.A.C. Santos Jr. leg.; MPEG 13302 • 1 ♀; same locality as for preceding; 04°53′45″ S, 65°19′11″ W; Oct. 2006; J.O. Dias leg.; MPEG 13307 • 1 ♀; same locality as for preceding; 04°48′56″ S, 65°01′53″ W; Jul. 2006; C.A.C. Santos Jr. leg.; MPEG 13318 • 1 ♂; same locality as for preceding; 04°50′01″ S, 65°03′53″ W; Sep. 2006; D.F. Candiani leg.; MPEG 13354 • 1 ♀; same locality as for preceding; 04°52′47″ S, 65°20′09″ W; Oct. 2006; N.F. Lo-Man-Hung leg.; MPEG 13363 • 1 ♀; same locality as for preceding; 04°52′07″ S, 65°15′53″ W; 13 Jul. 2003; D. Guimarães leg.; MPEG 22795 • 1 ♂; same locality as for preceding; 04°51′35″ S, 65°06′17″ W; Sep. 2006; S.C. Dias leg.; MPEG 13306 • 1 ♂; same locality as for preceding; 04°52′36″ S, 65°09′05″ W; 14 Jul. 2003; J.O. Dias leg.; MPEG 22819 • 1 ♂; same locality as for preceding; 04°51′54″ S, 65°20′02″ W; Oct. 2006; N.F. Lo-Man-Hung leg.; MPEG 13239 • 1 ♂; same collection data as for preceding; N.C. Bastos leg.; MPEG 13243 • 1 ♀; same collection data as for preceding; MPEG 13245 • 1 ♂; same locality as for preceding; 04°52′46″ S, 65°09′50″ W; Nov. 2006; N.F. Lo-Man-Hung leg.; MPEG 13247 • 1 ♂; same locality as for preceding; 04°54′16″ S, 65°19′37″ W; Nov. 2006; C.A.C. Santos Jr. leg.; MPEG 13251 • 1 ♀; same locality as for preceding; 04°48′47″ S, 65°01′57″ W; Jul. 2006; L.T. Miglio leg.; MPEG 13253 • 1 ♂; same locality as for preceding; 04°51′35″ S, 65°06′17″ W; Sep. 2006; N.F. Lo-Man-Hung leg.; MPEG 13263 • 1 ♂; same locality as for preceding; MPEG 13272 • 1 ♂; same locality as for preceding; 04°48′47″ S, 65°01′57″ W; Jul. 2006; L.T. Miglio leg.; MPEG 13279 • 1 ♂; same locality as for preceding; 04°52′25″ S, 65°09′05″ W; Oct. 2006; N.C. Bastos leg.; MPEG 13280 • 1 ♀; same locality as for preceding; 04°50′30″ S, 65°03′51″ W; Sep. 2006; C.A.C. Santos Jr. leg.; MPEG 13289 • 1 ♂; same locality as for preceding; 04°52′31″ S, 65°10′27″ W; Jul. 2006; L.T. Miglio leg.; MPEG 13290 • 1 ♀; same locality as for preceding; 04°53′30″ S, 65°20′07″ W; Nov. 2006; N.F. Lo- Man-Hung leg.; MPEG 13298 • 1 ♂; same locality as for preceding; 04°48′41″ S, 65°02′01″ W; Jul. 2006; J.O. Dias leg.; MPEG 13299 • 1 ♂; same locality as for preceding; 04°52′06″ S, 65°15′52″ W; Jul. 2006; L.T. Miglio leg.; MPEG 13304 • 1 ♀; same locality as for preceding; 04°48′56″ S, 65°01′53″ W; Jul 2006; J.O. Dias leg.; MPEG 13317 • 1 ♀; same locality as for preceding; 04°51′38″ S, 65°20′04″ W; Oct. 2006; N.F. Lo-Man-Hung leg.; MPEG 13321 • 1 ♀; same locality as for preceding; 04°52′06″ S, 65°15′52″ W; Jul. 2006; C.A.C. Santos Jr. leg.; MPEG 13327 ) • 2 ♂♂; same locality as for preceding; 04°48′45″ S, 65°01′58″ W; Jul. 2006; J.O. Dias leg.; MPEG 13329 • 1 ♀; same locality as for preceding; 04°53′14″ S, 65°13′37″ W; Sep. 2006; J.O. Dias leg.; MPEG 13337 • 1 ♂, 1 juv.; same locality as for preceding; 04°51′54″ S, 65°20′02″ W; Oct. 2006; J.O. Dias leg.; MPEG 13342 • 1 ♂; same locality as for preceding; 04°45′47″ S, 65°02′41″ W; Jul. 2006; C.A.C. Santos Jr. leg.; MPEG 13345 • 1 ♂; same locality as for preceding; 04°50′32″ S, 65°04′08″ W; Sep. 2006; C.A.C. Santos Jr. leg.; MPEG 13348 • 1 ♂; same locality as for preceding; 04°50′30″ S, 65°03′51″ W; Sep. 2006; J.O. Dias leg.; MPEG 13349 • 2 ♂♂; same locality as for preceding; 04°51′54″ S, 65°20′02″ W; Oct. 2006; N.F. Lo-Man-Hung leg.; MPEG 13352 • 1 ♂; same locality as for preceding; 04°50′32″ S, 65°04′08″ W; Sep. 2006; N.F. Lo-Man- Hung leg.; MPEG 13359 • 1 ♂; same locality as for preceding; 04°45′47″ S, 65°02′41″ W; Jul. 2006; L.T. Miglio leg.; MPEG 13362 • 1 ♂;same locality as for preceding; 04°50′50″ S, 65°05′03″W; Sep. 2006; C.A.C. Santos Jr. leg.; MPEG 13368 • 1 ♀; same locality as for preceding; 04°52′36″ S, 65°09′05″ W; 13 Jul. 2003; J.O. Dias leg.; MPEG 22822 • 1 ♀; same locality as for preceding; 04°51′17″ S, 65°04′14″ W; 17 Jul. 2003; A.B. Bonaldo leg.; MPEG 22830 • 1 ♂; same locality as for preceding; 19 Jul. 2002; A.B. Bonaldo leg.; MPEG 22835 • 2 ♀♀; same collection data as for preceding; 21 Jul 2003; J.O. Dias leg.; MPEG 22840 • 1 ♂; same locality as for preceding; A.B. Bonaldo leg.; MPEG 22846 .

Description

Female (holotype, MPEG 13322)

PROSOMA. Anterior eye row strongly recurved,ALE slightly larger than AME, posterior eye row procurved with subequal eyes; prosoma knobby, light brown with a thin longitudinal yellow line which widens

anteriorly on clypeus ( Fig. 4A–B ). Chelicerae and sternum light brown with yellow stains, endites and labium truncated and totally light brown.

OPISTHOSOMA. Rough surfaced with a large yellow taint covering the entire dorsal region, except the posterolateral abdominal projections.

LEGS. Anterior coxae and trochanters brown with dorsal yellow stains; other segments of legs I and II light brown with darker taints randomly distributed; legs III entirely yellow, except by metatarsi and tarsi and legs IV with femora half yellow, half light brown ( Fig. 4A )

MEASUREMENTS. Eye diameters and eye interdistances: AME 0.06, ALE 0.09, PME 0.08, PLE 0.08, AME–AME 0.08, AME–ALE 0.08, PME–PME 0.14, PME–PLE 0.06, MOQ length 0.32, MOQ width 0.32; leg formula: 1-2-4-3: leg I – femur 2.95/ patella 1.55/ tibiae 2.33/ metatarsus 1.45/ tarsus 0.93/ total 9.21; II – 2.33/ 1.24/ 1.55/ 1.29/ 0.77/ 7.18; III – 1.55/ 0.77/ 1.24/ 0.72/ 0.51/ 4.79; IV – 2.07/ 0.77/ 1.29/ 0.88/ 0.67/ 5.68. Total body length 5.94; prosoma 2.84 length, 2.69 width; opisthosoma length 3.10; clypeus 0.16 height; sternum 1.0 length, 0.88 width; endites 0.48 length, 0.29 width; labium 0.32 length, 0.38 width.

Male (MPEG 13239)

PROSOMA. Reddish-brown with a median yellow stripe and dark posterior slope ( Fig. 5A–B ); MS absent and eye disposition as in females. Sternum scutiform, as long as wide, light brown with a large yellow taint; labium and endites totally light brown and truncated.

LEGS. Legs I and II predominantly light brown with proximal yellow stains on tibiae and distal on metatarsi; posterior legs light brown, except by the bicolor femora ( Fig. 5A ).

OPISTHOSOMA. Greyish-brown with dark-yellow projections.

MEASUREMENTS. Eye diameters and eyes interdistances: AME 0.06, ALE 0.09, PME 0.06, PLE 0.06, AME–AME 0.06, AME–ALE 0.06, PME–PME 0.11, PME–PLE 0.04, MOQ length 0.24, MOQ width 0.25; leg formula: 1-2-4-3: leg I – femur 1.32/ patella 0.67/ tibiae 1.03/ metatarsus 0.72/ tarsus 0.45/ total 4.19; II – 0.96/ 0.53/ 0.77/ 0.56/ 0.40/ 3.22; III – 0.72/ 0.40/ 0.64/ 0.33/ 0.32/ 2.41; IV – 0.88/ 0.40/ 0.69/ 0.45/ 0.37/ 2.79. Total body length 3.06; prosoma 1.61 length, 1.43 width; opisthosoma length 1.45; clypeus 0.16 height; sternum 0.72 length, 0.62 width; endites 0.32 length, 0.19 width; labium 0.16 length, 0.24 width.

Distribution

Brazil (Amazonas) ( Fig. 9 ).

Figures

Fig.4.Female ofKryptochromahilaris Machado&Teixeira gen. etsp. nov.Holotype (MPEG13322). A. Habitus, dorsal view (arrows indicate the pair of circular taints on the posterior slope of the prosoma. B. Front. C, E. Epigynal plate, ventral view. D, F. Spermathecae, dorsal view.

Fig. 5. Male of Kryptochroma hilaris Machado & Teixeira gen. et sp. nov. (MPEG 13239). A. Habitus, dorsal view. B. Front. C–F. Left male palp. C, E. Ventral view. D, F. Retrolateral view.

Fig. 9. Distribution records of species of Kryptochroma Machado gen. nov.

Fig. 20. Illustrations of the left male palp in ventral and retrolateral view. A. Kryptochroma septata Machado & Teixeira gen. et sp. nov., paratype (UFMG 22431). B. K. hilaris Machado & Teixeira gen. et sp. nov. (MPEG 13239). C. K. macrostyla (Mello-Leitão, 1929) gen. et comb. nov. (MZSP 15320). D. K. parahybana (Mello-Leitão, 1929) gen. et comb. nov. (MPEG 09069)