Neosteingelia texana Morrison, 1927

Hodgson, Chris & Foldi, Imre, 2006, A review of the Margarodidae sensu Morrison (Hemiptera: Coccoidea) and some related taxa based on the morphology of adult males, Zootaxa 1263 (1), pp. 1-250 : 1-250

Neosteingelia texana Morrison

(Fig. 18)

Neosteingelia texana Morrison, 1927: 101 .

Material studied

USA, Texas, San Antonio , on hackleberry, 18th Sept. 1917, H.G.H. Weinert ( USNM): 3/5ad ♂♂, part of type material (in fair to poor condition, only one specimen stained; no metathoracic legs complete; only one complete antenna and all wings somewhat damaged and folded). Also : USA, Virginia, Blacksburg, Virginia Polytechnic Institute , base of Carya ovata , 29.ix.1990, I. Foldi ( MNHN): 2/2ad ♂♂ (labelled Neosteingelia texana , collected while copulating; in fair to poor condition; both wings missing off one specimen, and most legs showing some distortion. There are slight signs that one specimen may have been over­treated with KOH as some features are hard to determine) .

[Note: the data below refers to both lots of material unless otherwise stated; when different, data in square brackets refers to material from Virginia.]

Mounted material

Large, 1.8 [1.95–2.25] mm long; width across prealare 425 [470–570] µm. Body setae extremely few, mainly short and hair­like (hs), most about 10–20µm long, with normal shallow basal sockets; collared setae (cs), hairs (hrs), loculate pores (lp) and large convex pores (cp) all absent. Antennae long, flagellar segments all quite narrow, parallel­sided, becoming slightly shorter near apex; some basal segments with a few satellite setae (sats) in addition to normal setae. Legs well developed but with few setae, tibia with few spurlike setae, none bifurcated; tarsi clearly 2 segmented [possibly only 1 segmented]; claws with a small denticle [absent]; claw digitules setose. Abdominal segment I thought to be absent ventrally [possibly present]; abdomen without lateral caudal extensions; tergites of segments VI and VII with large tubular ducts; penial sheath triangular and more or less terminal.

Head

Broadly oval in dorsal view; length about 198 [230–260] µm; width across compound eyes 393 [450–480] m. Dorsally: postoccipital suture (pos) present across posterior part of epicranium (dmep), with a fairly narrow postocciput (poc) posteriorly. Midcranial ridge (mcr) represented by a faint, thin, lightly sclerotised ridge; dorsal part of epicranium (dmep) mainly membranous. Preocular ridge (procr) possibly present along margin of compound eye (cde) dorsally. Dorsal epicranium (dmep) with less than 10 hs on each side; loculate pores (lp) absent. Laterally: compound eyes (cde) each about 132 [155–170] m long, with about 90–100 [perhaps 150] ommatidia; each cde with a narrow, barely sclerotised ocular sclerite (ocs) along posterior margin of each compound eye and with a single ocellus (o) close to postoccipital suture; width of each ocellus 33–41 [23–28] µm; each ocular sclerite (ocs) with a sclerotised, longitudinal postocular ridge (pocr) along postero­dorsal margin; ventral projection (p) present. Ventrally with a strongly sclerotised series of ridges forming a five­armed cross, more distinct and heavily sclerotised than on Neosteingelia sp. , composed of: (i) a ventral midcranial ridge (vmcr) anteriorly; (ii) a pair of lateral preocular ridges (procr) each fusing with preoral ridge (pror) about half­way along latter’s length (Fig 18Z) [fusing where vmcr and pror meet (Fig 18, main drawing)], and (iii) a pair of preoral ridges (pror) posteriorly. Ventral part of epicranium (vmep) membranous apart from ridges; setal distribution as follows: anteriorly between midcranial ridges and antennae with 0–3 hs + 0 or 1 minute convex pore, plus either setae or minute pores present in a group medially on mid­cranial ridge [these setae or pores absent]; lateral area between preocular and preoral ridges with 1–3 hs per side; area posterior to preoral ridges and around mouth (m) with a total of about 11–14 hs. Cranial apophysis (ca) short and broad. Anterior tentorial arms (ata) and posterior tentorial arms (pta) not detected; tentorial bridge (tb) absent. With a pair of long, thin ventral sclerites (vs), appearing as extensions of preoral ridge, each articulating with cervical sclerite in neck region.

Antennae: 10­segmented [one antenna 9­segmented]; length uncertain — none complete [1.65–1.85 mm long] [ratio of total­body length to antennal length 1:0.83]. Scape (scp) 74–83 [95–108] m long, 107 [85–90] m wide, sclerotised, with a sclerotised