Pactola Pascoe, 1876, Pascoe, 1876

Mazur, Miłosz A., 2014, Review of the New Caledonian species of the genus Pactola Pascoe, 1876 (Coleoptera: Curculionidae: Eugnomini), with description of two new species, Zootaxa 3814 (2), pp. 202-220: 203-204

publication ID

http://dx.doi.org/10.11646/zootaxa.3814.2.3

publication LSID

lsid:zoobank.org:pub:567E8F5E-369C-428D-9E70-A798B8EC4C8E

DOI

http://doi.org/10.5281/zenodo.5659203

persistent identifier

http://treatment.plazi.org/id/DA500A15-FFCA-FFED-C0CF-FCADFC78FAD1

treatment provided by

Plazi

scientific name

Pactola Pascoe, 1876
status

 

Genus Pactola Pascoe, 1876  

Macropoda Montrouzier, 1861: 877   , non Macropoda Solier, 1835   ( Tenebrionidae   ); Perroud & Montrouzier, 1865: 165. Type species not designated.

Pactola Pascoe, 1876 a: 424   . Broun, 1880: 464 (redescription); Hudson, 1923: 394 (catalogue); Voss, 1936: 121 (transferred to Tachygoninae); Marshall, 1937: 333, figs. 3, 4 (transferred back to Eugnominae   , key to species); Hudson, 1950: 51, pl. XIV (variation of P. variabilis   ); Kuschel, 1964: 446 (synonymy between Macropoda   and Pactola   ); Cawthra, 1966: 171, 173–175, 177, figs. 7, 10, 15 (morphology); Kuschel, 1982: 279 (new synonymies, stat. n. for P. nigra   ); Leschen et al., 2003: 26 (in checklist of tribe); Macfarlane et al., 2011: 433 (checklist of N.Z. species).

Type species: Pactola variabilis Pascoe, 1876 a   (by monotypy).

Diagnosis. Distinguished from other genera of Eugnomini   by the following combination of characters: head not constricted near base, eyes distinctly convex without setae or scales between ommatidia; rostrum shorter or just slightly longer than head (figs. 14 a–d); antennae inserted near apex of rostrum, funicles with seven segments (figs. 15 a–d); elytra without large, sharp, conical spines, sometimes furnished with apically rounded tubercles; wings well developed; front coxae contiguous; hind femora strongly broadened, with distinct, enlarged tooth that is usually larger than half of maximum femoral width; hind tibiae strongly curved (figs. 17 c, 18 c, 19 c, 20 c).

Distribution. Fiji   Archipelago, New Caledonia, New Zealand, ( Table 1).

Species Distribution

Pactola convexa (Montrouzier, 1860)   New Caledonia Pactola demissa Pascoe, 1876 b   New Zealand

Pactola fairburni Marshall, 1938   New Zealand

Pactola fiji Mazur, 2012   Fiji   Archipelago (Taveuni Is.) Pactola fuscicornis Broun, 1913   New Zealand

Pactola hudsoni Marshall, 1938   New Zealand

Pactola magna   sp. n. New Caledonia Pactola nitidula Broun, 1913   New Zealand

Pactola proxima   sp. n. New Caledonia Pactola posticalis Marshall, 1938   New Zealand

Pactola setacea ( Montrouzier, 1861)   New Caledonia Pactola variabilis Pascoe, 1876 a   New Zealand

Cawthra (1966) mentioned P. variabilis   as occurring also in New Caledonia, but this may have been meant to refer to the entire genus, not this particular species. Pactola variabilis   has been recorded only from New Zealand, where it is common in many localities, and it has been listed as an endemic in this country by Kuschel (1990) and Macfarlane et al. (2011). My examination of numerous Pactola   specimens from New Caledonia indicates that P. variabilis   does not occur there.

Biology. No detailed biological information is known for the genus. Other members of Eugnomini   have been reared from dead wood, subcortical tissues, live stems, galls, leaves or fruits of many species of plants in different families ( May, 1987). Larvae of Pactola demissa   have been reared from the bark of dead branches of Hoheria populnea   ( Malvaceae   ) ( May, 1987) and adults are attracted to cut branches of Parsonsia heterophylla   ( Apocynaceae   ) ( Kuschel, 1990). Pactola variabilis   has been reared from dying subcortical tissues of Pseudopanax lessonii   ( Araliaceae   ) ( May, 1987), Schefflera digitata   ( Araliaceae   ) ( Kuschel, 1990) and Hebe   spp. ( Plantaginaceae   ) ( Watt, 1956), and Styles (1973) reared P. variabilis   and P. fuscicornis   from Pseudopanax   spp.

Remarks. The first species of Pactola   described, from New Caledonia, namely P. convexa   , P. s e t a ce a and P. kanalensis (Perroud)   , were originally placed in Macropoda Montrouzier, 1861   ( Montrouzier, 1861; Perroud & Montrouzier 1865), but a genus with this name had already been established in Tenebrionidae   by Solier (1835). The three New Caledonian species were later placed in Pactola   , described by Pascoe (1876 a) from New Zealand with only one included species, P. variabilis   , when Kuschel (1964) synonymised Macropoda Montrouzier   with Pactola   . In 1876 Pascoe described one more species ( P. demissa   ) but in a separate paper (1876 b). Macropoda Solier, 1835   is presently treated as a subgenus of Adesmia Fischer   de Waldheim, 1822, a tenebrionid genus occurring in sub-Saharan Africa.

Pactola   is readily distinguishable from the other described genera of Eugnomini   by its very short rostrum and the large tooth on the extremely extended hind legs ( Figs. 17 View FIGURES 17 – 20 c, 18 c, 19 c, 20 c). A relatively large tooth on the hind legs is found in many other genera as well, but their femora are usually more elongate and the rostrum is usually longer than the head or the head plus pronotum (e.g., Amylopterus Broun   , Eugnomus Schoenherr   , Gonoropterus Broun, Koghicola Mazur   , Scolopterus White   , Rhopalomerus Blanchard   ). Some species of these genera also possess strongly protruding tubercles on the elytra (e.g., Amylopterus   , Gonoropterus   ) but these form sharp, conical spines usually furnished with a tuft of hair-like scales. Hoplocneme White   is also similar to Pactola   in having a similarly short rostrum and femoral tooth, but it differs in having the head strongly constricted near the base and 6 - segmented antennal funicles. Pactolotypus Broun   , with seven species described from New Zealand and the Chatham and Subantarctic Islands ( Kuschel, 1964), is also similar to Pactola   , but it differs in having the metaventrite longer than abdominal ventrite 1 behind the coxae, 6 - or 7 -segmented antennal funicles, the humeral calli not developed (apterous) and the ommatidia convex with fine hairs or squamiform setae between them. The recently described genus Koghicola ( Mazur 2014) differs in having enlarged hind trohanters, and elytra strongly narrowed to apex, each elytra with prominent, divergent apical process.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Curculionidae

Loc

Pactola Pascoe, 1876

Mazur, Miłosz A. 2014
2014
Loc

Pactola

Macfarlane 2011: 433
Leschen 2003: 26
Kuschel 1982: 279
Cawthra 1966: 171
Kuschel 1964: 446
Hudson 1950: 51
Marshall 1937: 333
Voss 1936: 121
Hudson 1923: 394
Pascoe 1876: 424
1876
Loc

Macropoda

Montrouzier 1861: 877
1861