Lanceobostra oaxacae, 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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persistent identifier |
https://treatment.plazi.org/id/2A31DCCA-F0F8-4F27-BFC4-4282D11788A8 |
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taxon LSID |
lsid:zoobank.org:act:2A31DCCA-F0F8-4F27-BFC4-4282D11788A8 |
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treatment provided by |
Plazi |
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scientific name |
Lanceobostra oaxacae |
| status |
sp. nov. |
Lanceobostra oaxacae sp. n.
urn:lsid:zoobank.org:act:2A31DCCA-F0F8-4F27-BFC4-4282D11788A8
( Figs. 37C–D View FIGURE 37 , 38H–J View FIGURE 38 , 39L–N, 39R–T View FIGURE 39 , 91C View FIGURE 91 )
HT, ♀: Mex, Oaxaca, 24–25 mi N Pto Escondido, rd to Oaxaca, mountain forest, roadside, 2 ix 1981, Otte, Azuma , Newlin , #45 [ ANSP] .
PT, ♂: Mexico, Oaxaca, Hwy 131, km 40, Puerto Escondido> Oaxaca, nr. Lachao , 18°12.307’N, 97°08.959’W, ca. 1500 m, Berg-Regenwald, leg. S. Eilmus 30.IX.2007 [coll. FH, No. 0714–1] GoogleMaps .
Diagnosis. Both sexes of this new species are well characterised within the genus by the short and atypically ovoid head and convex vertex ( Figs. 38H–J View FIGURE 38 ). Females strongly resemble the more northern distributed type-species L. aetolus ( Westwood, 1859) comb. n. from southern Sonora and Sinaloa, but may also be separated by roundly truncated and almost straight posterior margin of the anal segment ( Fig. 39M View FIGURE 39 ; apex narrowed and deeply notched in aetolus ), very indistinct praeopercular organ that is only represented by two small, carinate swellings ( Fig. 91C View FIGURE 91 ; two long, converging spiniform processes in aetolus ) and slender basitarsi (with a ± distinct medio-dorsal lobe in aetolus ). Males furthermore differ from all other known ♂♂ of the genus by the plain dark greyish brown colour ( Fig. 37D View FIGURE 37 .
Etymology. Named after the state of Oaxaca, the distribution of this new species.
Description. ♀♀ ( Fig. 37C View FIGURE 37 ): Medium sized (body length incl. subgenital plate 155.0 mm), slender species with a moderately bi-cornute head, sparsely tubercular thorax and a long, lanceolate subgenital plate. General colouration of holotype ochreous mid brown and all over furnished with small dark brown to black speckles. Tubercles of the thorax reddish pale brown. Eyes dull ochre with a fine black longitudinal ocular line. Antennae drab basally and gradually becoming dull reddish brown towards the apex.
Head ( Fig. 38H View FIGURE 38 ): Ovoid, some 1.3x longer than wide, broadest behind the eyes with the genae gently rounded in dorsal aspect, vertex very slightly convex in anterior portion, the posterior portion flattened. Frons with a pair of distinct small impressions between the bases of the antennae and vertex with a pair of fairly small, conical cephalad horns. Head capsule otherwise smooth. Eyes fairly prominent, circular in outline, strongly convex and their diameter contained 2.5x in length of genae. Antennae slender and roughly reaching half way along abdominal segment II. Scapus dorsoventrally compressed, slightly narrowed towards the base and about 2x longer than wide. Pedicellus round in cross-section and roughly half the length of scapus.
Thorax: Pronotum about equal in length but noticeably narrower than head, about 1.6x longer than wide and roundly rectangular in dorsal aspect, the lateral margins slightly concave. Anterior margin with a pair of small tubercles medially. Transverse median sulcus indistinct, straight, short and covering no more than about half the width of segment. Surface set with a few granules, a pair of slightly enlarged median granules in front and behind transverse median sulcus and a pair of well decided tubercles near posterior margin ( Fig. 38H View FIGURE 38 ). Mesothorax 7.6x longer than pronotum and with posterior portion very slightly widened. Mesonotum with a shallow longitudinal median carina and sparsely set with blunt tubercles ( Fig. 38H View FIGURE 38 ), which become fewer and less decided towards the posterior of segment. A longitudinal marginal row of small tubercles near lateral margins. Metanotum only set with a few scattered small tubercles and some granules along lateral margins. Meso- and metapleurae with a longitudinal median row of variably sized tubercles. Meso- and metasternum with a fine longitudinal median carina, otherwise sparsely and minutely tubercular.
Abdomen: Median segment somewhat shorter than metanotum and about 3.4x longer than wide, the lateral margins gently concave. Segment II roughly equal in length to median segment. II–V gradually increasing in length, VI and VII decreasing in length with VII only about two-thirds the length of V; V longest segment and about 4.3x longer than wide. II–V of uniform width. VI slightly narrowing and VII slightly expanded towards the posterior. All terga and sterna smooth. Praeopercular organ very indistinct and only formed by a pair of carinate median swellings near posterior margin, which is marked by a reddish brown marking ( Fig. 91C View FIGURE 91 ). Terga VIII–X noticeably narrower than previous, all slightly tectate longitudinally. VIII less than two-thirds the length of VII, some 2x longer than wide and gradually narrowing towards the posterior; the later margins gently deflexed and convex. IX a little more than half the length of VIII. Anal segment indistinctly longer than IX and slightly constricted in the apical portion, the posterior margin almost straight with a very shallow concave median excavation and the outer angles rounded ( Fig. 39M View FIGURE 39 ). Epiproct very small and roundly triangular; hardly visible in dorsal aspect. Cerci small, elongate, oval in cross-section and narrowed towards a narrow but blunt tip; slightly projecting over posterior margin of anal segment. Gonapophyses VIII somewhat elongated with the apex slightly upcurved, acutely pointed and almost reaching to posterior margin of anal segment. Subgenital plate distinctly keeled longitudinally with the apex acuminate and projecting over apex of abdomen by about 1.6x the length of terga VIII–X combined ( Figs. 39L–N View FIGURE 39 ).
Legs: All of moderate length, slender and almost entirely unarmed. Profemora almost as long as mesothorax, mesofemora longer than metathorax, metafemora reaching about two-thirds the way along abdominal segment IV and metatibiae reaching half way along abdominal segment VII. Two outer ventral carinae of meso- and metafemora with a very indistinct expansion sub-basally, the medioventral carina with 2–3 minute spines sub-apically. Probasitarsus elongate and equal in length to remaining tarsomeres combined, the dorsal carina gently uniformly raised. Meso- and metabasitarsi somewhat longer than following three tarsomeres combined.
♂♂ ( Fig. 37D View FIGURE 37 ): Medium sized (body length 98.2 mm) and slender with an untypically globose head. General colouration plain dark greyish brown, the basal five abdominal segments dull ochre. Lower portion of genae pale ochre. Basal half of meso- and metafemora ochre, then gradually becoming mid brown and finally dark brown at the apex. Meso- and metatibiae with a drab ochre transverse band sub-basally and a much less decided, very faint ochre transverse band sub-apically; apex of all tibiae dark blackish brown. Bases of all tarsi yellowish drab. Antennae pale brown with the basal portion mid brown ventrally.
Head ( Fig. 38J View FIGURE 38 ): Ovoid, only 1.2x longer than wide, broadest at the eyes with the vertex gently rounded and the genae slightly narrowing towards the posterior; entirely smooth. Vertex with a very fine, impressed longitudinal median coronal line. Eyes large, circular in outline, strongly convex and projecting hemispherical; their diameter contained 1.4x in length of genae. Antennae very long, slender, filiform and roughly reaching to posterior margin of abdominal tergum VII. Scapus compressed dorsoventrally, slightly gradually narrowing towards the base and about 2.2x longer than wide. Pedicellus round in cross-section and somewhat constricted in the apical half; about half the length of scapus.
Thorax: Pronotum about as long but noticeably narrower than head, the lateral margin concave and roughly 2x longer than wide; surface smooth ( Fig. 38J View FIGURE 38 ). Transverse median sulcus fairly distinct, slightly curved, but not reaching lateral margins of segment. Mesothorax 8.8x longer than pronotum, entirely smooth except for a fine longitudinal marginal carina parallel to lateral margins. Meso- and metasternum slightly tectate longitudinally.
Abdomen: Median segment slightly shorter than metanotum. Segment II very slightly shorter than median segment. II–V roughly of equal length and of uniform width, VI and VII decreasing in length; II–V about 4.6x longer than wide, VII only about 3x longer than wide. Sterna II–VII with a very faint longitudinal median keel. Tergum VIII about 2/3 the length of VII and trapezoidal in dorsal aspect with posterior margin almost 2x wider than anterior margin. IX 1.3x longer than VIII, slightly tectate longitudinally with anterior margin noticeably broader than posterior margin and in the median portion slightly constricted; the lateral margins somewhat deflexed but almost straight in lateral aspect. Anal segment somewhat shorter than IX, roughly parallel-sided with a fine longitudinal median keel and the posterior margin with a shallow concave median excavation ( Fig. 39S View FIGURE 39 ); the outer angles rounded, swollen and minutely dentate ventrally. Vomer fairly small, elongate triangular, symmetrical and gradually narrowing towards a pointed terminal hook; lower surface with a distinct longitudinal median furrow ( Fig. 39T View FIGURE 39 ). Cerci slender, round on cross-section very slightly in- and back-curving and with the apex slightly swollen interiorly. Poculum strongly convex, cup-shaped, reaching some two-thirds along tergum IX and with a small but fairly acute conical central projection ( Fig. 39R View FIGURE 39 ); the posterior portion keeled longitudinally ( Fig. 39T View FIGURE 39 ).
Legs: All long and slender. Profemora a little longer than pro- and mesothorax combined, mesofemora almost equal in length to mesothorax, metafemora reaching to posterior margin of abdominal tergum V and metatibiae considerably projecting over apex of abdomen. Medioventral carina of meso- and metafemora with two very minute spines sub-apically. Basitarsi elongate and slender, pro- and metabasitarsi a little longer than remaining tarsomeres combined.
Remarks: Eggs unknown.
Table 19: Measurements of Lanceobostra oaxacae sp. n.
| ANSP |
Academy of Natural Sciences of Philadelphia |
| FH |
Fort Hays |
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.
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