Haasea gruberi, Antić & Akkari, 2020

Antić, Dragan & Akkari, Nesrine, 2020, Haasea Verhoeff, 1895 - a genus of tumultuous history and chaotic recordsredefinition, revision of taxonomy and geographic distributions, with descriptions of two new species from Austria and Serbia (Diplopoda, Chordeumatida, Haaseidae), Zootaxa 4798 (1), pp. 1-77 : 51-57

Haasea gruberi sp. nov.

Figs 27–30 , 38 , 41

Orobainosoma flavescens flavescens— Attems (1954) (misidentification)

Diagnosis. New species differs from the other congeners by the presence of a unique, short and simple angiocoxal mesal process columnar in shape, without additional teeth and by the presence of a strongly developed coxal process on the posterior gonopods of almost the same size as telopodites.

Etymology. The new species is named in honour of our colleague Dr. Jürgen Gruber for his significant contribution to understand the taxonomy of genus Haasea , his impressive collection of specimens and literature he made available for us and his overall dedication and work on Austrian millipedes.

Material examined: Holotype ♂, Orobain. flavescens , det. Attems, Natterriegel 48 Franz [= Austria, Styria, north of Admont, Natterriegel hochalp., 30.07.1948, H. Franz leg.] ( NHMW9470 ) . Paratype ♀, same data as holo- type ( NHMW9471 ). See comments below .

Non type: 1 ♂, O. flavescens Attems det.; with label “x212” of H. Franz; referring to “Admonter Kogel near Graz, 02.08.1942 ”, Austria ( AGES) .

Description. Body in adults with 30 segments (including telson).

MEASUREMENTS. Males 8 mm long, vertical diameter of the largest pleurotergite 0.7 mm. Female 9 mm long, vertical diameter of the largest pleurotergite 0.8 mm.

COLORATION ( Fig. 27A ). Brownish yellow.

HEAD ( Fig. 27 B–E). Setose, frontal side straight in males, slightly convex in female. Labrum with three medial teeth in paratype male and female ( Fig. 27D ), one medial tooth (abberant?) in holotype male, with 4+3 labral and 1+1 supralabral setae ( Fig. 27 B–C). Mentum semicircular, without setae. Lingual plates (holotype male) with 5+4 setae arranged in one or two rows. Stipites with 5+5 long setae and ca. 20+20 short setae. Antennae elongated, slender, with dorsomedial and ventromedial row of small papillae-like outgrowths (as in Fig. 2 D–F), 1.65 mm long in holotype male. Length of antennomeres (in mm): I (0.07), II (0.18), III (0.44), IV (0.18), V (0.37), VI (0.18), VII (0.18) and VIII (0.05). Length/breadth ratios of antennomeres I–VII: I (0.8), II (1.6), III (4.9), IV (1.8), V (2.8), VI (1.5) and VII (2). Antennomeres II, IV, V, VI and VII with one, three, one, four and one sensillum, respectively. Lateral to antennal sockets a group of similar papillae-like outgrowths present (as in Fig. 2C ). Number of ommatidia: 10–12 in 4 rows in males; 12–13 in 4 rows in paratype female, arranged in triangle.

COLLUM. Narrower than head, with six macrochaetae. Anterior edge semi-circular, posterior margin gently concave.

BODY SEGMENTS ( Fig. 27F ). With lateral humps. Macrochaetae long and trichoid. CIX (segment 15) = 0.8; MIX (pleurotergite 15) ~ 3; PIX (segment 15) = 0.6; MA (segment 15) ~ 105˚.

TELSON. Epiproct with a pair of spinnerets and 3+3 setae (1+1 paramedian, 2+2 marginal). Hypoproct semicircular with 1+1 apical setae. Paraprocts with 3+3 marginal setae.

LEG- PAIRS 1 AND 2 ( Fig. 28A ). In both sexes leg-pairs 1 and 2 with tarsal combs; prefemora with several long and robust setae; femora and postfemora each with several long and robust setae arranged in a group.

MALE SEXUAL CHARACTERS ( Fig. 28 ). Leg-pair 2 with genital openings on coxae ( Fig. 28A ). Leg-pairs 3–7 enlarged. Distal half of tarsi 3–7 with ventral papillae ( Fig. 28 B–F). Leg-pair 10 significantly smaller than the rest of the walking legs; with coxal sacks and with a robust, blunt coxal process. ( Fig. 28G ). Leg-pair 11 with coxal sacks, but no other peculiarities ( Fig. 28H ).

ANTERIOR GONOPODS ( Figs 29 A–B, D–E, 30A–C). Typical of the genus Haasea . Mesal process (mp) simple, columnar in shape, oriented posteriad. Without anterior lateral process; posterior lateral process (plp) simple, short, straighten and hardly visible. Posterior lamella bilobed, upper lamella (pl1) smaller and rounded, lower lamella (pl2) large, ear-shaped and bent down into an extension. Mesodistal lobe (mdl) without fimbriae-like outgrowths.

POSTERIOR GONOPODS ( Figs 29C, F , 30D ). Typical of the genus Haasea , with well-developed two-segmented and setose telopodites (t) and strongly developed coxal processes (cp). Coxal process almost the same length as telopodites, with three branches. Anterior branch (ab) strongly developed, bifurcated, curved posteriad; medial branch (mb) short, subtriangular in anterior or posterior view; posterior branch (pb) simple, with slightly extended distal end.

LEG- PAIR 3 IN FEMALE. With lateral sternal lobes.

VULVAE. Not examined.

Distribution ( Figs 38 , 41 ). Known only from Natterriegel in Haller Mauern and Admonter Kogel in Styria, Austria.

Type locality. Natterriegel in Austria .

Comments. Attems (1954: 311) misidentified this new species as Orobainosoma flavescens flavescens —“Natterriegel hochalp., 1 Ex., 30.7.48” and “Umg. Graz”.

The vial with holotype and paratype we examined, contained only a label with Attems’s handwriting: “ Orobain flavescens Natterriegel 48 Franz”. According to Franz’s fieldtrip diary from 1948, he visited Natterriegel only on 30.07.1948. There, only two places (with different habitats) were stated: Admont—Natterriegel and Natterriegel hochalp. Since Attems (1954) stated this new species as O. flavescens flavescens from Natterriegel hochalp. collected at the same date (30.07.1948), we stated the same date in material.

In the second vial, with non-type male, there were two labels, one with Attems’s handwriting: Orobainosoma flavescens Latzel , and the second with the reference x212. According to Franz’s fieldtrip diary x212 stands for: “Admonter Kogel, 2.8.42, S-Hang, Gesiebe in Buchenwald mit etwas Quercus pubescens ; recht trocken”. Although there is a doubt since this locality is relatively far from the type locality and the habitat is completely different, we have listed it as such. This locality is stated with a question mark.

Figures

FIGURE 2. General habitus of Haasea Verhoeff, 1895. A–K. H. flavescens (Latzel, 1884). A, C–E, H–K. Male from Lower Austria, Rekawinkel, Vienna Woods. B, F. Female from Austria, Vienna, Heuberg, Vienna Woods. G. Male from Austria, Vienna, Heuberg, Vienna Woods. A. Head, lateral view. B. Head, anterior view. C. Papillae-like outgrowths lateral to antennal socket, lateral view. D. Right antenna, lateral view. E. Right antennomere 6, ventrolateral view. F. Antennomeres 4 and 5, ventral view. G. Segment 15, dorsal view. H. Apex of midbody macrochaeta. I. Posterior margin of midbody metazona. J. Midbody segments, dorsolateral view. K. Body end, dorsolateral view. Scale bars: 0.2 mm (A, B), 0.1 mm (C, D, F, G, K), 0.05 mm (J), 0.02 mm (E, I), 0.01 mm (H).

FIGURE 27. Haasea gruberi sp. nov. A. Holotype male (NHMW9470), habitus, lateral view. B. Holotype male (NHMW9470), head, anterior view. C. Holotype male (NHMW9470), labrum, anterior view. D. Paratype female (NHMW9471), head, anterior view. E. Holotype male (NHMW9470), gnathochilarium, ventral view. F. Holotype male (NHMW9470), body segments 11–14, dorsal view. Scale bars: 1 mm (A), 0.1 mm (B–F).

FIGURE 28. Haasea gruberi sp. nov., holotype male (NHMW9470). A. Leg-pair 2, posterior view. B. Leg-pair 3, anterior view. C. Right leg 4, posterior view. D. Right leg 5, posterior view. E. Left leg 6, anterior view. F. Leg-pair 7, anterior view. G. Left leg 10, posterior view. H. Left leg 11, posterior view. Scale bars: 0.1 mm.

FIGURE 29. Haasea gruberi sp. nov., A. Holotype male (NHMW9470), left anterior gonopod, lateral view. B. Holotype male (NHMW9470), right anterior gonopod, mesal view. C. Holotype male (NHMW9470), posterior gonopods, anterior view. D. Male from Admonter Kogel, Austria, left anterior gonopod, lateral view. E. Male from Admonter Kogel, Austria, left anterior gonopod, mesal view. F. Male from Admonter Kogel, Austria, right posterior gonopod, posterior view. Abbreviations: ab—anterior branch; cp—coxal process; mb—medial branch; mdl—mesodistal lobe; mp—mesal process; pb—posterior branch; pl1, pl2—posterior lamellae; t—telopodite. Scale bars: 0.1 mm.

FIGURE 30. Haasea gruberi sp. nov., holotype male (NHMW9470). A. Left anterior gonopod, lateral view. B. Right anterior gonopod, mesal view. C. Right anterior gonopod, posterodistal view. D. Left posterior gonopod, posterior view. Abbreviations: ab—anterior branch; asl—anterior sternal lobe; cp—coxal process; mb—medial branch; mdl—mesodistal lobe; ml—“Opuntia-like” membranous lobe; mp—mesal process; msp—medial sternal process; pb—posterior branch; pc—papillated cone; pl1, pl2—posterior lamellae; plp—posterior lateral process; t—telopodite. Scale bar: 0.1 mm.

FIGURE 38. Distribution of the genus Haasea.

FIGURE 41. Distribution of H. cyanopida (Attems, 1903), H. faucium (Verhoeff, 1931a), H. filicis (Verhoeff, 1929), H. gruberi sp. nov., H. musimontium (Strasser, 1937) and H. pretneri (Strasser, 1966).