Megaphyllum (Parancistrum) tenenbaumi Jawlowski 1931

Megaphyllum (Parancistrum) tenenbaumi (Jawłowski, 1931)

Figs 23–34 and 56

Chromatoiulus tenenbaumi Jawłowski, 1931: 163 –164, figs 8–10. Chromatoiulus (Phauloiulus) tenenbaumi: Attems 1940: 307. Megaphyllum tenenbaumi: Tăbăcaru 1995: 25.

Material examined. Neotype (ZMTA) (Figs 23–25): 1 ♂ (intact), Israel, Nahal Keziv [Nahal Kziv], pitfall trapping, 134-5, 17– 31.I.1999, leg. M. Finkel., SG det.

Additional material. All from Israel: ZMUC: 1 ♀, unknown locality, probably M. R. Warburg leg., SG det. ZMTA: M. Finkel leg., SG det.: 1 ♂, 3 ♀♀, Golan; from Nahal Kziv: 3 ♂♂, 1 juv., pitfall trapping, SF 33-3, 17– 31.I.1999; 2 ♀♀, NFS7-2,17– 31.I.1999; 1 ♀, pitfall trapping, 134-4, 17–31.I.1999; 1 ♂, SFS 1-7, 12.XII.1998 – 2.I.1999; 1 ♂, NFS 6-1, 17–31.I.1999; 1 ♀, pitfall trapping, NFS 9-9, 17–31.I.1999; 1 ♂, pitfall trapping, SFS 1-10, 12.XII.1998 – 2.I.1999; 1 ♀, 1 juv., pitfall trapping, NFS 6-7, 12.XII.1998 – 2.I.1999;1 ♀, 1 juv., pitfall trapping, NFS 6-9, 17–31.I.1999; 1 ♀, pitfall trapping, NSF 7-4, 12.XII.1998 – 2.I.1999; 1 ♀, pitfall trapping, B 4-2, 12.XII.1998 – 2.I.1999; 1 ♂, 3 ♀♀, 1 juv., pitfall trapping, NFS 5-6, 12.XII.1998 – 2.I.1999; 3 ♀♀, pitfall trapping, NFS5-9,17– 31.I.1999; 2 ♂♂, 1 ♀, 2 juv., pitfall trapping, NFS 7-2, 12.XII.1998 – 2.I.1999; 1 ♂, SFS 3-1, 17– 31.I.1999; 2 ♀♀, NFS 6-8, 17–31.I.1999; 1 ♀, B 4-1, 12.XII.1998 – 2.I.1999; all M. Finkel leg.; ZMUM: 1 ♂, Nahal Kziv, pitfall trapping, B-7, 28.XI.–12.XII.1998, M. Finkel leg., SG det.; NMNHS: 1 ♂, 1 ♀, Nahal Kziv, pitfall trapping, SFS 2-10, 12.XII.1998 – 2.I.1999, M. Finkel leg., SG det.; HNHM: 1 ♂, Nahal Kziv, pitfall trapping, SFS 3-7, 17–31.I.1999, M. Finkel leg., SG det.

Diagnosis. Differs from M. serratum and M. turcicum by the smooth, rather than serrated, anterior opisthomere process; from M. curvifolii and M. genezarethanum by the apically incised, rather than rounded, promere; and from M. arcuatum sp. n. by the anterior solenomere protrusion (asp) being short, blunt and pointing distad, as opposed to the same process being slenderer, tapering, turned posteriad in the latter species, as well as by the promere’s incision being considerably deeper than in M. arcuatum.

Descriptive notes. Measurements similar to those observed in M. genezarethanum: males, 33–40 mm in length, 2.1–2.4 mm in height, females, 35–45 mm, and 2.9–3.2 mm, respectively. The two species are also alike in coloration and external characters (Figs 23–24); pre-anal process and subanal scale somewhat longer, more strongly protruding in M. tenenbaumi (Fig. 25). Penis (Figs 26–27) with more strongly converging—rather than parallel—sides and with almost entirely caudad directed lamellae.

Gonopods: Promere (Fig. 29 and P in Fig. 28) somewhat stouter, less strongly elongated than in genezarethanum, with a deeply incised apex. Opisthomere (Figs 28 and 30) with a slightly tapering posterior process (pp) ending up by a narrowly rounded apex; a pointed anterior process (ap) slightly broader and longer (almost reaching the level of solenomere’s tip) than that in genezarethanum. Solenomere (s) with a short, anterior, lamellar protrusion (asp), without apical plumose outgrowths.

Vulvae (Figs 31–34 and 55) stouter, more robust, with more prominent mesal (mh) and lateral apical humps (lh), and shorter bursal lamellae (bl). The scanned vulva of one female showed a bizarre modification of part of its setae: bulging, twisted-like knots in their mid-sections (Fig. 33). However, the vulvae of the other examined female were perfectly normal, so these modified setae are most likely an aberration rather than a species-specific character. Inner structure of vulvae as in Fig. 34; main differences from M. genezarethanum being the distally wider apodematic tube (at), the more globular posterior ampulla (pa) and the thicker connecting tube (ct).

Distribution. Israel: Rosh-Pina [Rosh Pinna] (type locality) (Jawłowski 1931); Golan Heights, Nahal Kziv (new records).

Remarks. The type specimens of M. tenenbaumi had been deposited, like most of the other type material of Jawłowski, in the Krakow Museum, but everything perished during World War II. (J. Wytwer, personal communications). As there are two particularly similar species— M. genezarethanum and M. arcuatum sp. n. —a name-bearing type is necessary to clarify the taxonomic status of M. tenenbaumi. This situation requires a neotype designation under Article 75.1. (ICZN 2000). The neotype is chosen from Nahal Kziv, Israel, only ca 45 km away from the original type locality (Jawłowski 1931).

The morphometric and descriptive characters of the neotype are as follows: Developmental stadium XI, body ring number 50+1+T, length 36 mm, height 2.1 mm. Coloration somewhat faded, antennae dark brown, head lighter brownish with a black band between ocellaria; collum brown with darker margins; prozona darker in anterior rings, greyish above, brownish below ozopore level; metazona brown, darker at ozopore level and above it at posterior margins; legs brownish, with darker distal 3 podomeres; pre-anal ring blackish-brown with a light brown caudal process; anal valves irregularly brownish proximally, yellowish-beige distally. Mandibular stipites enlarged (arrow in Fig. 24), ellipsoid, without distinct anterior corner. Metazona densely striated, with 10–11 striae in a square with sides equal to metazonal length just below ozopore level; a row of erect setae ca 1/2–2/3 of metazonal length present at metazonal hind margin. Pre-anal process straight (Fig. 25), with a slightly ventrad turned hyaline tip surpassing the longest setae on anal valves. Anal valves densely pilose, without distinct rows of shorter setae along caudal margin. Subanal scale triangular, sharply pointed, protruding by about its distal quarter behind rear contour of anal valves.