Lanceobostra glabra, Hennemann & Conle, 2024
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publication ID |
https://doi.org/ 10.11646/zootaxa.5444.1.1 |
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publication LSID |
lsid:zoobank.org:pub:5DE4A9DD-99F7-4E23-AD50-58DC491BB75E |
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DOI |
https://doi.org/10.5281/zenodo.11071756 |
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persistent identifier |
https://treatment.plazi.org/id/139279E3-3161-4510-9078-225D22686F0E |
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taxon LSID |
lsid:zoobank.org:act:139279E3-3161-4510-9078-225D22686F0E |
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treatment provided by |
Plazi |
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scientific name |
Lanceobostra glabra |
| status |
sp. nov. |
Lanceobostra glabra sp. n.
urn:lsid:zoobank.org:act:139279E3-3161-4510-9078-225D22686F0E
( Figs. 38A–B, 38F–G View FIGURE 38 , 39E–F View FIGURE 39 )
HT, ♀: Mexico: Jalisco “Sierra Autlan”, ± 20mi. SSE. Autlan, 5500‘, Mar.2.1953, I.J. Cantrall 50; Bostra similis Redt. Det. T.H. Hubbell 1954 ; UMMZI–191535 [ UMMZ] .
Diagnosis. Females (the only sex known) of this new species strongly resemble L. similis ( Redtenbacher, 1908) comb. n. and L. tridenticulata ( Redtenbacher, 1908) comb. n. but are well characterised within the genus by the glabrous body surface and very elongate, slender, flattened and sub-cylindrical head ( Figs. 38 View FIGURE 38 F-G). From the first species they may also be distinguished by the less numerous and less uniformly sized but on average larger and ochre (reddish brown in similis ) tubercles of the thoracic segments ( Fig. 38G View FIGURE 38 ), notably more pronounced tubercles of the vertex, slightly longer median segment, as well as the longer anal segment, that is notably longer than wide and has the posterior margin narrowed and with a small digitiform median projection ( Fig. 39F View FIGURE 39 ; as long as wide with the apex triangular and emarginated on both sides in similis ). From the ♀♀ of tridenticulata they can also be separated by the somewhat larger size (body length including subgenital plate 116.0 mm in the holotype of tridenticulata ), tubercular vertex (wholly smooth in tridenticulata ), much more prominently tubercular thorax (metanotum almost entirely smooth in tridenticulata ), notably longer median segment (only two-thirds the length of metanotum in tridenticulata ), shape of the anal segment (posterior margin rounded in tridenticulata ) and lack of the apical teeth of the medioventral carina of the meso- and metafemora.
Etymology. The name (lat. glabra = glabrous, glossy) describes the conspicuously glabrous and glossy body surface of this new species. Feminine.
Description. ♀♀ ( Fig. 38A–B View FIGURE 38 ): Rather small (body length including subgenital plate 130.0 mm) and slender species with a glossy body surface, a prominently tubercular thorax, an elongate and sub-cylindrical head and a long, lanceolate subgenital plate. General colouration of unique holotype plain ochreous, the meso- and metasternum rather buff with the medio-longitudinal keel dark yellow.All tubercles of the thorax dark yellow to ochre and at least the dorsal ones tipped with dark reddish brown, those of the head wholly dark yellow. Eyes reddish brown with a fine longitudinal median line. Genae straw in ventral portion and with a faint greyish brown longitudinal postocular streak. Meso- and metatibiae each with two very faint pale transverse bands. Antennae drab and gradually becoming darker towards the apex with the ventral surface reddish brown.
Head ( Figs. 38 View FIGURE 38 F-G): Elongate, sub-cylindrical, 1.8x longer than wide, broadest at the eyes and very weakly narrowing towards the posterior; vertex flattened. Frons with a distinct C–shaped impressed behind bases of antennae and two shallow, obtuse tubercles behind this impression. Vertex with about twelve paired, obtuse tubercles, the two outermost just behind the eyes being the largest; an uneven postocular longitudinal row of granules also present on genae and a few even smaller granules in lower portion of genae. Eyes of moderate size, slightly oval in outline and their length contained about 2.5x inn length of genae. Antennae reaching to posterior margin of abdominal segment II- Scapus compressed dorsoventrally with the outer lateral margin very slightly rounded apically; about 1.8x longer than wide. Pedicellus slightly globular and scarcely more than half the length of scapus; antennomere III narrowing towards the apex and a little shorter than pedicellus.
Thorax: Pronotum slightly shorter and narrower than head, rectangular in dorsal aspect and almost 1.9x longer than wide; the entire surface with a slightly impressed medio-longitudinal line and the transverse median sulcus distinct, gently curved and almost expanding over entire width of segment. Anterior half with two converging rows of 4–5 obtuse tubercles, that increase in size towards the posterior with the two tubercles directly in front of the sulcus the most prominent ones. Posterior half with a pair of fairly prominent median tubercles directly behind the sulcus and a two further tubercles posterior to these; a cluster of small tubercles laterally. Lateral margins very weakly concave in lateral aspect and the anterior margin set with four low tubercles ( Fig. 38G View FIGURE 38 ). Mesothorax 6–7x longer than prothorax and uniform in diameter except for being very weakly widened posteriorly; metanotum slightly less than one-third the length of mesonotum, parallel-sided and about 3.3x longer than wide ( Fig. 38G View FIGURE 38 ). Meso- and metanototum both with a weakly indicated medio-longitudinal carinae and all over unevenly supplied with obtusely conical tubercles of variable sizes; those along the lateral surfaces arranged in a longitudinal row and the lateral margins set with granules. Meso- and metapleurae with a longitudinal median carina that is armed with a row of prominent, conical tubercles. Meso- and metasternum obtusely tectate longitudinally and sparsely set with granules in the outer lateral portions.
Abdomen: Median segment scarcely shorter and notably narrower than metanotum, about 3.4x longer than wide and the lateral margins very weakly concave; surface irregularly supplied with moderately sized tubercles. Tergum II set with several rather small tubercles, III with a similar number of much smaller tubercles and the following terga sparsely set with granules, with the granules becoming gradually less pronounced; all with an obtuse longitudinal carina close to lateral margins. Segments II–VII unequal in length with II almost as long as median segment, III and V notably longer and IV shorter than II; V–VII slightly decreasing in length on diameter. III about 2.8x and VII 3.4x longer than wide. Sterna II–VII minutely and very sparsely granulose, weakly tectate longitudinally and with an acute, lamellate carina along lateral margins. Praeopercular organ formed by a narrowly placed pair of digitiform posteromedian processes on sternum VII. Terga VIII–X somewhat narrower than preceding and roughly uniform in width, all carinate medio-longitudinally. VIII about half as long as VII and 2.2x longer than wide, IX slightly shorter than VIII and about 2x longer than wide. Anal segment scarcely longer than IX with the posterior portion narrowed and the posterior margin roundly angular with a pointed, digitiform median projection ( Fig. 39F View FIGURE 39 ). Epiproct minute and wholly concealed under anal segment. Cerci elongate, slender and conical with the apex notably projecting beyond the posterior margin of anal segment. Subgenital plate long, lanceolate, naviculate, gradually narrowing towards a fairly pointed tip and projecting beyond apex of abdomen by more than the length of the three terminal terga taken together; the basal portion with a distinct and acute longitudinal keel along lateral margins ( Figs. 39EF View FIGURE 39 ).
Legs:All of moderate length, slender and wholly unarmed.Profemora almost as long as mesothorax, mesofemora notably longer than metathorax, metafemora reaching about half the way along abdominal segment V and metatibiae very slightly projecting beyond anal segment. Probasitarsus elongate and scarcely longer remaining tarsomeres combined excluding claw, the dorsal carina uniformly lamellate. Meso- and metabasitarsi somewhat longer than following three tarsomeres combined.
Remarks: Males and eggs unknown.
Table 16: Measurements of Lanceobostra glabra sp. n.
| UMMZ |
University of Michigan, Museum of Zoology |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.