Review of the species of Pelodiaetodes Moore (Coleoptera: Carabidae: Bembidiini: Anillina) of New Zealand Sokolov, Igor M. Zootaxa 2015 3963 4 561 582 8KYBX Moore 1980 Moore 1980 [151,473,1564,1590] Insecta Carabidae Pelodiaetodes Animalia Coleoptera 1 562 Arthropoda genus   Description. Size.SBL range 1.38–1.72 mm.  Habitus.Body form weakly convex, subparallel ( Fig. 5).   FIGURE 1. SEM illustrations of body parts of Pelodiaetodesspecies. Head, dorsal aspect: A P. prominens; B P. nunni. Pronotum, dorsal aspect: C P. prominens, D P. nunni. Legend: ass–anterior supraorbital seta; bs–basilateral pronotal seta; cl– clypeus; cs–clypeal seta; fs–frontal seta; l–labrum; ls–midlateral pronotal seta; mg–marginal pronotal gutter; mp3–maxillary palpomere3; mp4–maxillary palpomere 4; pss–posterior supraorbital seta. Scale bars = 0.1mm.  Color.Body brunneorufous or rufotestaceous, appendages testaceous.  Microsculpture.Dorsal microsculpture of polygonal sculpticells, on head, pronotum and elytra with isodiametric mesh pattern through over the dorsal surface. Development of microsculpture varies on different body parts. On head and disc of pronotum microlines less pronounced, fine, while on elytra microlines very distinct, forming well pronounced sculpticells with “scaly” mesh pattern.  Luster.Body surface shiny.  Macrosculpture.Body surface sparsely and finely punctate.  Vestiture.Body surface covered with sparse yellowish short setae. Vestiture of elytra short (less than one-third length of discal setae).  Fixed setae.Primary head setae include a pair of clypeal (cs), a pair of frontal (fs), a pair of anterior supraorbital (ass) and a pair of posterior supraorbital (pss) setae ( Fig. 1A–B). Mentum with two pairs of long primary (paramedial and lateral) setae ( Fig. 4C, pms, lms). Submentum with two pairs of long primary setae in two rows (lss, prss) and few additional shorter setulae ( Fig. 4C). Maxilla with long stipetal and palpiferal setae ( Fig. 4D). Pronotum with two long primary lateral setae (midlateral, ls, and basilateral, bs) on each side ( Fig. 1C–D). Elytra either with 1 or 3 discal setae ( Fig.2C–D), with scutellar (ed2) and apical (ed8) setae. Last three (7th, 8th and 9th) pores (eo7, eo8 and eo9) of umbilicate series equidistant, but not aligned, with 8th pore shifted towards the disc and virtually forming an obtuse isosceles triangle. 7th pore aligned with 6th and 9th. Fifth visible sternite of male with two and of female with four setae along the posterior margin.   FIGURE 2. SEM illustrations of structural features of  Pelodiaetodesspecies. Basal part of left elytron, dorsal aspect: A  P. prominens; B  P. nunni. Elytra, dorsal aspect: C  P. prominens, D  P. nunni. Legend: axt–auxillar tubercle; bm–basal margin; ed2–scutellar seta; ed3–ed6–discal elytral setae; ed8–apical elytral seta; eo1–9–setae 1–9 from the umbilicate series; eg–elytral groove; lb–lateral pronotal bead; sct–scutellum. Scale bars = 0.2mm.  Head( Fig. 1A–B). Anterior margin of clypeus (cl) straight. Frontal area flat without tubercle medially near frontoclypeal suture. Fronto-lateral carinae distinct and long.  Eyes.Eyes absent.  Antennae.Submoniliform, 11-segmented, extended to about posterior margin of pronotum. Antennomeres 1 and 2 elongate, of equal length and 1.4–1.5 times longer than antennomere 3, which is only slightly elongate and 1.2–1.3 times longer than antennomere 4. Antennomeres 4 to 10 globose, last antennomere conical and 1.6–1.8 times longer than penultimate antennomere.  Labrum( Fig. 1A–B). Labrum (l) transverse with almost straight, entire anterior margin and with six setae apically, increasing in size from the central pair outwards.  Mandibles( Fig. 4A–B). General plan of  Bembidion type( Maddison 1993). Right mandible with distinct anterior (art) and posterior retinacular (prt), weakly developed terebral (tt), distinct premolar (pm) and molar (mt) teeth. Left mandible with distinct terebral (tt), premolar (pm) and molar (mt) teeth only.   FIGURE 3. SEM illustrations of structural features of legs of  Pelodiaetodesspecies, various aspects. A–Bprotarsus: Aleft protarsus of  P. nunni, ventral aspect; Bright protarsus of  P. aldermensis, ventral aspect. C–Dprotibia: Cleft protibia of  P. nunni, ventral aspect; Dleft protibia of  P. aldermensis, medial aspect. E–Hmesotibia: Eright mesotibia of  P. prominens, dorsal aspect; Fright mesotibia of  P. aldermensis, dorsal aspect; Gright mesotibia of  P. moorei, dorsal aspect; Hleft mesotibia of  P. nunni, dorsal aspect. I–Lmetatibia: Iright metatibia of  P. prominens, dorsal aspect; Jleft metatibia of  P. aldermensis, dorsal aspect; Kleft metatibia of  P. moorei, dorsal aspect; Lleft metatibia of  P. nunni, dorsal aspect. Legend: ac–antenna cleaner; as–adhesive seta; asp–anterior spur; asr–anterior setal row; cls–clip seta; msb–mesotibial brush; msms–mesotibial modified seta; mss–mesotibial spur; mtb–metatibial brush; mtms–metatibial modified seta; mts–metatibial spur; psp–posterior spur; psr–posterior setal row; sb–setal band; ta1–ta4–tarsomeres 1–4. Scale bars = 0.02mm.   FIGURE 4. Line drawings of the mouthparts of  Pelodiaetodes prominens. Aleft mandible, dorsal aspect; Bright mandible, dorsal aspect; Clabium, ventral aspect; Dright maxilla, ventral aspect. Legend: art–anterior retinacular tooth; c–cardo; dls– dorsal lobe of stipes; e–epilobe of mentum; gsc–glossal sclerite; g1–galeomere 1; g2–galeomere 2; lc–lacinia; lms–lateral mental seta; lp2–labial palpomere 2; lp3–labial palpomere 3; lss–lateral submental seta; m–mentum; ms–mental-submental suture; mt–molar tooth; mp2–maxillary palpomere 2; mp3–maxillary palpomere 3; mp4–maxillary palpomere 4; pf–palpifer; pge–palpiger; pm–premolar tooth; pms–paramedial mental seta; prss–primary submental seta; prt–posterior retinacular tooth; sm–submentum; tr–terebral ridge; tt–terebral tooth; vls–ventral lobe of stipes. Scale bars = 0.1mm.  Maxillae( Fig. 4D). Maxillary palps similar to  Bembidion( Maddison 1993)with basal trianguloid cardo, and stipes with dorsal and ventral lobes (dls, vls), dimerous galea (g1, g2), and standard lacinia (lc). Palpus with moderately long 4th palpomere (mp4), 0.25–0.30 length of palpomere 3 (mp3).  Labium( Fig. 4C). Labium with mental tooth; mentum (m) and submentum (sm) split, with mental-submental suture (ms) and with slightly enlarged lateral mental lobes (llm). Glossal sclerite (gsc) membraneous apically, with two setae, paraglossae lacking.   FIGURE 5.Digital images of habitus of Pelodiaetodesspecies, dorsal aspect. A P. prominens(NZ, Northland, Waipoua Forest); B P. constricticollis(NZ, Northland, Radar Bush), paratype; C P. aldermensis(NZ, Waikato, Aldermen Islands), paratype; D P. moorei(NZ, Northland, Poor Knight Islands), paratype; E P. moorei(NZ, Northland, Puketi Forest); F P. nunni(NZ, Otago, Oamaru), paratype. Scale bar = 1mm.  Prothorax( Fig. 1C–D, 6). Pronotum cordiform, moderately convex, slightly sinuate posteriorly, with wide marginal gutter (mg) and with short subparallel basal constriction. Posterior margin of pronotum almost straight, slightly oblique laterally. Anterior angles prominent, moderately protruding forward. Posterior angles denticulate, with 1 distinct tubercle (axt), bearing the basolateral seta, anterior to the angles ( Fig. 2A–B). Widths across anterior margin much greater than between posterior angles (WPa/WPp varies from 1.15 to1.24 among species).  Scutellum( Fig. 2A–B). Externally visible, triangular, with broadly rounded apex.  Elytra( Fig. 2C–D). Elytra relatively short (LE/SBL from 0.52 to 0.54 among species) without visible interneurs, but with oblique longitudinal groove (eg), stretching from the scutellar pore (ed2) downward to the 9th umbilical pore (eo9). Humeri rounded, to form oblique angle with longitudinal axis of body. Basal margination (bm) indistinct ( Fig. 2A–B). Apical half of elytra with shallow subapical sinuation.   Hindwings.Absent.   FIGURE 6.Digital images of pronota of Pelodiaetodesspecies. A P. prominens(NZ, Northland, Waipoua Forest); B P. constricticollis(NZ, Northland, Radar Bush), paratype; C P. moorei(NZ, Northland, Poor Knight Islands), paratype; D P. moorei(NZ, Northland, Puketi Forest); E P. aldermensis(NZ, Waikato, Aldermen Islands), paratype; F P. nunni(NZ, Otago, Oamaru), paratype. Scale bars = 0.5mm.  Pterothorax.Metaventrite short, distance between meso- and metacoxae about 0.5–0.8 diameter of mesocoxa. Metanepisternum short, subquadrate, with anterior and outer margins of equal length. Metendoventrite crossshaped with lateral arms.  Legs( Fig. 3). Legs of moderate length, not elongate. Prothoracic legs of males with first 2 tarsomeres (ta1–2) markedly dilated apico-laterally with two rows of oval articulo-setae (as) ( Stork 1980) on the ventral surface ( Fig. 3B). Protibiae ( Fig. 3C–D) with antenna cleaner of typeB ( Hlavac 1971), with both anterior (asr) and posterior (psr) apical setal rows and concave apico-lateral notch. Length of anterior spur (asp) equal to length of the 1st tarsomere (ta1). Profemora moderately swollen. Mesotibiae ( Fig. 3E–H) with 1–2 rows of modified posterodorsal setae (msms) at apical half, with two terminal spurs (mss) and tibial brush (msb). Metafemora unmodified, metatibiae ( Fig. 3I–L) with row of modified posterodorsal setae (mtms) in apical half, with two terminal spurs (mts) and tibial brush (mtb). Tarsi pentamerous ( Fig. 3A–B), last and 1st tarsomeres are the longest, 2–4 tarsomeres of equal length on the tarsi of all legs, 1st tarsomere shorter than combined length of 2–4 tarsomeres. Tarsal claws simple, untoothed ( Fig. 3A–B).   FIGURE 7.Line drawings of male aedeagus of  Pelodiaetodesspecies.  P. prominens(NZ, Northland, Omahuta Forest): Amedian lobe, right lateral aspect; Bleft paramere, left lateral aspect; Cright paramere, right lateral aspect.  P. constricticollis(NZ, Northland, Radar Bush): Dmedian lobe, right lateral aspect; Eleft paramere, left lateral aspect; Fright paramere, right lateral aspect.  P. moorei(NZ, Northland, Poor Knight Islands): Gmedian lobe, right lateral aspect; Hleft paramere, left lateral aspect; Iright paramere, right lateral aspect.  P. moorei(NZ, Northland, Puketi Forest): Jmedian lobe, right lateral aspect; Kleft paramere, left lateral aspect; Lright paramere, right lateral aspect.  P. aldermensis(NZ, Waikato, Aldermen Islands): Mmedian lobe, right lateral aspect; Nleft paramere, left lateral aspect; Oright paramere, right lateral aspect.  P. nunni(NZ, Otago, Oamaru): Pmedian lobe, right lateral aspect; Rleft paramere, left lateral aspect; Sright paramere, right lateral aspect. Legend: dp–dorsal plate; vp–ventral plate. Scale bar = 0.1mm.  Abdominal ventrites. Five visible abdominal ventrites: 2nd ventrite longest, 2.5–3 times longer than 3rd or 4th, 3rd and 4th equal in length; the last, 5th, 1.3–1.6 times longer than 4th. Intercoxal process of 2nd ventrite broad, subparallel, conically rounded anteriorly.  Male genitalia( Fig. 7–8). Median lobe of aedeagus anopic, elongate, slightly twisted and moderately arcuate. Internal sac with two copulatory sclerites, representing by dorsal and ventral plates. Dorsal plate (dp) in form of a stick-like plate, bifurcating or not apically. Ventral plate (vp) much smaller than dorsal plate, claw-like, bifid basally. Additional spines or scaled membranous fields of internal sac are absent. Parameres typically bisetose, except left paramere of  P.nunni3-setose ( Fig. 7R). Left paramere large and broad evenly tapered to apex, right paramere short. Ring sclerite triangular with trianguloid handle-like extension (hd) of similar shape among species.   FIGURE 8.Line drawings of ring sclerite of Pelodiaetodesspecies, male genitalia, dorsal aspect. A P. prominens(NZ, Northland, Omahuta Forest). BP. constricticolllis (NZ, Northland, Radar Bush). C P. aldermensis(NZ, Waikato, Aldermen Islands). D P. moorei(NZ, Northland, Poor Knight Islands). E P. nunni(NZ, Otago, Oamaru). Legend: hd–handle of ring sclerite. Scale bar = 0.1mm.  Female internal genitalia( Fig. 9–10). Gonocoxite 1 asetose (gc1). Gonocoxite 2 falciform (gc2), 1.6–1.8 times longer than its basal width, moderately curved, with medial basal ridge (mbr), and with medial (mes) and lateral (les) ensiform and apical nematiform (ns) setae. Shape of medial basal ridge and length of ensiform setae vary among species. Laterotergite (lt) with 8–11 setae. Spermatheca (sp) sclerotized, small, rufous, subparallel, either with enlarged basal half or almost spherical.  Included taxa.The genus comprises two subgenera and five species: nominotypical subgenus includes  P. prominensMoore,  P. moorei,  sp. n.,  P. constricticollis,  sp. n.,  P. aldermensis,  sp. n., and subgenus Monosetodes, subgen.n., includes  P. nunni,  sp. n.  Geographical distribution.The species of this genus are known from two widely separated regions of New Zealand( Fig. 11). Species of the  Pelodiaetodes s.str.inhabit the northern half of the North Island, while the only representative of the subgenus Monosetodesis known from a single locality in the southern part of the South Island.  Way of life.According to the label information, specimens of  Pelodiaetodeswere taken either from the leaf litter or from the washed soil samples in broadleaf and kauri forests, from the litter of a shearwater colony (Aves, Procellaridae,  Puffinus bulieri), from decayed or rotten wood, and from mosses at tree bases and on the ground. Collecting dates are August, September, October, November, December, January and April.  Relationships.Morphologically, the putative closest relative of  Pelodiaetodesamong the New Zealandanillines is  Pelodiaetus. Both genera share developed fronto-lateral carinae, cordiform shape of pronotum and distinct longitudinal elytral groove, distinguishing them by the combination of these characters from any other New ZealandAnillina. Compared with other Anillina the members of  Pelodiaetodes(and  Pelodiaetus) differ from Australian  Illaphanusand Madagascan  Bulirschiaand  Malagasytyphlusby the presence of a mental tooth, thus formally belonging to another anilline assemblage sensu Jeannel (1963). But subsequent authors showed the low taxonomic value of the mental tooth at a suprageneric level and the usefulness of this character only for generic discrimination ( Sciaky & Zaballos 1993; Zaballos & Casale 1997; Giachino 2005; Giachino & Vailati 2011). According Giachino (2008)the closest morphological relative to the New ZealandAnillina with grooved elytra might be the Madagascan  Malagasydipnus. Species of the latter genus share with the members of  Pelodiaetodesand  Pelodiaetussuch characters as (i) presence of the mental tooth; (ii) cordiform pronotum with distinct posterior angles, but without denticles in front of them; (iii) three discal elytral setae; (iv) two dilated protarsomeres in males; (v) and two, flagelliform and falciform, structures in the inner sac of median lobe. Nevertheless, the position of  Pelodiaetodeswithin the group of Anillina with grooved elytra remain unclear at present, and awaits molecular data phylogenetic analysis along with thorough morphological phylogenetic analysis of the entire group. The key provided below allows identification of males of  Pelodiaetodes., including separation from all other New Zealandaniline genera. Females of  Pelodiaetodescan be identified only by distributional information, preferably by association with microsympatric males.