Sinotilla Lelej, 1995, Sinotilla serpa columnata ( Chen, 1957 ),

Okayasu, Juriya, 2018, Taxonomic review of Chin-wen Chen’s species described in the genus Smicromyrme (Hymenoptera: Mutillidae), Acta Entomologica Musei Nationalis Pragae 58 (2), pp. 479-494: 486-492

publication ID

http://doi.org/ 10.2478/aemnp-2018-0036

publication LSID

lsid:zoobank.org:pub:6E96FFED-A1EF-49B6-A9A1-D0EF95B9E9AF

DOI

http://doi.org/10.5281/zenodo.4548631

persistent identifier

http://treatment.plazi.org/id/03CC4A4A-473A-FFB0-FC51-FEA5FDB8A309

treatment provided by

Felipe

scientific name

Sinotilla Lelej, 1995 Sinotilla serpa columnata ( Chen, 1957 )
status

 

Genus Sinotilla Lelej, 1995 

( Figs 19–40View Figs 19–22View Figs 23–26View Figs 27–29View Figs 30–32View Figs 33–36View Figs 37–40)

Sinotilla Lelej, 1995b: 18  , ♁ ♀. Type species: Smicromyrme boheanus Chen, 1957  , by original designation (misspelled as boheana).

Diagnosis. Male. Head elevated posteriorly; frons and vertex longitudinally striate; ocelli each with longitudinal carina posteriorly; anterior margin of clypeus protruding medially; mandible with one preapical inner denticle; ventral margin of mandible excised into large tooth or not excised and with weak lobe; F1 0.5–0.6 times as long as wide and 0.3–0.4 times the length of F2; maxillary palpus almost as long as antenna; pterostigma length ( Fig. 23View Figs 23–26) less than 0.6 times the distance between pterostigma and base of RS on vein Sc + R; T2 and S2 each with lateral felt line, shorter on S; T7 densely punctate, sometimes with median longitudinal impunctate line; volsellar cuspis short and oval, apically and its inner margin with setae, without basal external lobe.

Female. Genal carina weakly developed; hypostomal teeth present; clypeus with median basal tubercle, and with protruding transverse lamellate carina on anterior margin; mandible slender; fore tarsus without external comb of spines; scutellar scale weak but distinct; T2 with apical narrow band of dense, appressed setae, slightly widened medially (except Sinotilla spinicauda  comb. nov.); T3 with wide uniform band of dense, appressed setae; T6 lacking distinct flattened pygidium, glabrous, unsculptured and polished throughout, with lateral margins remarkably convergent basally and not carinate even apically.

Species included. Smicromyrme serpa  columnata, Sm. spinicauda  , and Sm. trisectus  possess the diagnostic characters listed above. This genus includes 21 species including these ones (for the other 18 species see OKAYASU (2017) and OKAYASU et al. (2018)).

Gender. The gender of this genus was not mentioned in the original description. It is feminine according to LELEJ & BROTHERS (2008), so the original spellings of Chen’s species are maintained below.

Remarks. Males of this genus are similar to those of Ephucilla  , Nordeniella Lelej, 2005  , and Smicromyrme  in mandible narrowed to apex, propodeum without dorsal teeth, fully developed wing, and volsella without external lobe, but differ in mandible with lobe or tooth on ventral margin (without lobe or tooth in Nordeniella  ), maxillary palpus as long as antenna (much shorter in others), F1 0.5–0.6 times as long as wide (as long as wide in others) and S2 with short lateral felt line (without felt line in Ephucilla  and Nordeniella  ). Females of this genus are similar to those of the genera Promecilla  , Nordeniella  , Karunaratnea Lelej, 2005  , Ephucilla  , and Indratilla Lelej, 1993  in having an indistinct pygidial area, but differ in having the scutellar scale weak but distinct (absent in Promecilla  and Nordeniella  ; strongly developed in Karunaratnea  ) and pygidial area remarkably convergent basally without any trace of lateral carina (elongate with weak lateral carina apically in Ephucilla  and Indratilla  ). Females of this genus can be divided into four expedient groups ( OKAYASU 2017). In females, Sinotilla  is similar to Promecilla  , but in males they can be separated by F1 (as long as wide in Promecilla  ), maxillary palpus (much shorter than antenna in Promecilla  ), S2 (without lateral felt line in Promecilla  ), and the volsellar shape (with more or less widened external lobe in Promecilla  ).

Sinotilla serpa columnata ( Chen, 1957)  , comb. nov., stat. nov.

( Figs 19–26View Figs 19–22View Figs 23–26)

Smicromyrme columnata Chen, 1957: 205  , ♁. Type locality: “Kuling [= Guling]” (Jiangxi, China). Holotype: ♁ (TARI), examined.; LELEJ (2005: 58).

Type material examined. HOLOTYPE: ♁, Guling , Lushan, Jiangxi, China,  21.ix.1934, O. Piel leg. ( TARI). PARATYPES: 1♁, Guling, Lushan, Jiangxi, China, 17.ix.1934, O. Piel leg. ( TARI); 1 ♁, Guling, Lushan, Jiangxi, China, 18.ix.1934, O. Piel leg. ( TARI); 1 ♁ ( Figs 19–26View Figs 19–22View Figs 23–26), Chien-Men, Kwangtseh, Fujian, China, 22.–23.viii.1943, T. C. Maa leg. ( TARI).

Diagnosis. Male. This species is similar to Si. hong Lelej, 1995  , Si. runcina ( Zavattari, 1914)  , and Si. trisecta  comb. nov. in having mandible with a weak ventral lobe, but differs in the following combination of characters: mandible beneath weakly excised ( Fig. 25View Figs 23–26; not excised in others: Fig. 39View Figs 37–40); POL/OOL = 0.668–0.863, 0.781 on average (0.8 in Si. hong  ; 0.500–0.646, 0.578 on average in Si. runcina  ; 0.675–0.747, 0.714 on average in Si. trisecta  ); POL/LOD = 2.86–4.27, 3.56 on average (1.76–2.45, 2.17 on average in Si. runcina  ; 2.95–4.07, 3.37 on average in Si. trisecta  ; unknown in Si. hong  ); frons with wide weak longitudinal carina extending from lateral ocellus ( Fig. 24View Figs 23–26; with wide strong carina in Si. trisecta  and probably in Si. hong  : Fig. 38View Figs 37–40); mesosoma yellowish red except propleuron, mesopleuron, metapleuron, and propodeum black (in nominotypical subspecies scutellum, axilla, and metanotum are also black; mesopleuron and metapleuron yellowish red in Si. hong  ; propleuron dorsally and, mesopleuron and metapleuron in dorsal half yellowish red in Si. runcina  ; entirely black in Si. trisecta  : Fig. 34View Figs 33–36); metasoma black (T1 on apical and lateral margins and segment 2 entirely yellowish red in Si. trisecta  : Fig. 34View Figs 33–36); apical lobe of parapenial lobe robust ( Figs 21View Figs 19–22, 29View Figs 27–29; more slender and basally constricted in Si. runcina  and Si. trisecta  : Fig. 35View Figs 33–36; unknown in Si. hong  ).

Female. Unknown.

Distribution. China: Jiangxi, Fujian ( CHEN 1957).

Remarks. One out of two paratypes from Kwangtseh could not be found in TARI. Smicromyrme columnatus  (mainland China) differs from Sinotilla serpa  ( Taiwan; Figs 27–29View Figs 27–29) in yellowish red scutellum, axilla, and metanotum (black in Si. serpa  ). In other respects, these two taxa are identical including male genitalia. They do not have an overlapping distribution and are only very slightly different from each other. Although such variation in mesosomal color is sometimes observed in a single species even in the same geographical area (e.g. Smicromyrme lewisi Mickel, 1935  in the northern part of Honshû and Hokkaidô, Japan; TSUNEKI 1972, TERAYAMA et al. 2011), I treat Sm. columnatus  as a subspecies of Si. serpa  here. Discovery of the female or molecular experiments will give more insight into the relationship between them.

A specimen of Si. runcina  from Sarawak has setal bands on T2 and T3, while specimens from the Malay Peninsula have setal bands on T1–T3. Therefore, the number of setal bands on the metasoma is not useful in separating Si. serpa  and Si. runcina  .

Sinotilla serpa columnata ( Chen, 1957)  , comb. nov., stat. nov.

( Figs 19–26View Figs 19–22View Figs 23–26)

Smicromyrme columnata Chen, 1957: 205  , ♁. Type locality: “Kuling [= Guling]” (Jiangxi, China). Holotype: ♁ (TARI), examined.; LELEJ (2005: 58).

Type material examined. HOLOTYPE: ♁, Guling , Lushan, Jiangxi, China,  21.ix.1934, O. Piel leg. ( TARI). PARATYPES: 1♁, Guling, Lushan, Jiangxi, China, 17.ix.1934, O. Piel leg. ( TARI); 1 ♁, Guling, Lushan, Jiangxi, China, 18.ix.1934, O. Piel leg. ( TARI); 1 ♁ ( Figs 19–26View Figs 19–22View Figs 23–26), Chien-Men, Kwangtseh, Fujian, China, 22.–23.viii.1943, T. C. Maa leg. ( TARI).

Diagnosis. Male. This species is similar to Si. hong Lelej, 1995  , Si. runcina ( Zavattari, 1914)  , and Si. trisecta  comb. nov. in having mandible with a weak ventral lobe, but differs in the following combination of characters: mandible beneath weakly excised ( Fig. 25View Figs 23–26; not excised in others: Fig. 39View Figs 37–40); POL/OOL = 0.668–0.863, 0.781 on average (0.8 in Si. hong  ; 0.500–0.646, 0.578 on average in Si. runcina  ; 0.675–0.747, 0.714 on average in Si. trisecta  ); POL/LOD = 2.86–4.27, 3.56 on average (1.76–2.45, 2.17 on average in Si. runcina  ; 2.95–4.07, 3.37 on average in Si. trisecta  ; unknown in Si. hong  ); frons with wide weak longitudinal carina extending from lateral ocellus ( Fig. 24View Figs 23–26; with wide strong carina in Si. trisecta  and probably in Si. hong  : Fig. 38View Figs 37–40); mesosoma yellowish red except propleuron, mesopleuron, metapleuron, and propodeum black (in nominotypical subspecies scutellum, axilla, and metanotum are also black; mesopleuron and metapleuron yellowish red in Si. hong  ; propleuron dorsally and, mesopleuron and metapleuron in dorsal half yellowish red in Si. runcina  ; entirely black in Si. trisecta  : Fig. 34View Figs 33–36); metasoma black (T1 on apical and lateral margins and segment 2 entirely yellowish red in Si. trisecta  : Fig. 34View Figs 33–36); apical lobe of parapenial lobe robust ( Figs 21View Figs 19–22, 29View Figs 27–29; more slender and basally constricted in Si. runcina  and Si. trisecta  : Fig. 35View Figs 33–36; unknown in Si. hong  ).

Female. Unknown.

Distribution. China: Jiangxi, Fujian ( CHEN 1957).

Remarks. One out of two paratypes from Kwangtseh could not be found in TARI. Smicromyrme columnatus  (mainland China) differs from Sinotilla serpa  ( Taiwan; Figs 27–29View Figs 27–29) in yellowish red scutellum, axilla, and metanotum (black in Si. serpa  ). In other respects, these two taxa are identical including male genitalia. They do not have an overlapping distribution and are only very slightly different from each other. Although such variation in mesosomal color is sometimes observed in a single species even in the same geographical area (e.g. Smicromyrme lewisi Mickel, 1935  in the northern part of Honshû and Hokkaidô, Japan; TSUNEKI 1972, TERAYAMA et al. 2011), I treat Sm. columnatus  as a subspecies of Si. serpa  here. Discovery of the female or molecular experiments will give more insight into the relationship between them.

A specimen of Si. runcina  from Sarawak has setal bands on T2 and T3, while specimens from the Malay Peninsula have setal bands on T1–T3. Therefore, the number of setal bands on the metasoma is not useful in separating Si. serpa  and Si. runcina  .

TARI

Taiwan Agricultural Research Institute

T

Tavera, Department of Geology and Geophysics

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Mutillidae

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Mutillidae

Genus

Sinotilla

Loc

Sinotilla Lelej, 1995 Sinotilla serpa columnata ( Chen, 1957 )

Okayasu, Juriya 2018
2018
Loc

Sinotilla

LELEJ A. S. 1995: 18
1995
Loc

Smicromyrme columnata

LELEJ A. S. 2005: 58
CHEN C. 1957: 205
1957