Electrocambala ornata, Moritz & Wesener, 2021
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publication ID |
https://doi.org/ 10.5852/ejt.2021.755.1397 |
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publication LSID |
lsid:zoobank.org:pub:CEB00D62-0890-403C-8C54-968DC52C8290 |
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DOI |
https://doi.org/10.5281/zenodo.4984679 |
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persistent identifier |
https://treatment.plazi.org/id/E66F551F-57A6-4FF6-BD95-C06FD4AD3627 |
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taxon LSID |
lsid:zoobank.org:act:E66F551F-57A6-4FF6-BD95-C06FD4AD3627 |
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treatment provided by |
Felipe |
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scientific name |
Electrocambala ornata |
| status |
gen. et sp. nov. |
Electrocambala ornata gen. et sp. nov.
urn:lsid:zoobank.org:act:E66F551F-57A6-4FF6-BD95-C06FD4AD3627
Diagnosis
Electrocambala ornata gen. et sp. nov. differs from Electrocambala cretacea gen. et sp. nov. by the presence of net-like ornamentation on the ventral half of the prozonite ( Fig. 1F View Fig ), V-shaped striae laterally on the collum ( Fig. 1D View Fig ) and the absence of longitudinal ridges on the body rings. Metazonite on ventral half with 7 longitudinal striae. Metazonite from body ring 4 onwards distinctly arched ( Fig. 1A View Fig ). Body rings 2–5 narrower than collum and following body rings ( Fig. 1B View Fig ). Anterior gonopod coxite more than twice as long as wide, with inner lobe longer than outer lobe, telopodite narrow, as long as coxite. Posterior gonopod simple, as long as anterior gonopod, projecting between inner and outer lobes of anterior gonopod ( Fig. 1G–H View Fig ).
Etymology
From the Latin word ʻ ornatus ʼ meaning ʻornamentedʼ in reference to the net-like ornamentation and striae on the body rings of the species. Noun in apposition.
Type material
Holotype MYANMAR • ♂; Kachin State, Hukawng Valley, Mid-Cretaceous Burmese amber inclusion; formerly in the collection of Patrick Müller ( BuB1151 ); ZFMK-MYR7369 .
Paratype MYANMAR • 1 ♀; same collection data as for holotype; formerly in the collection of Patrick Müller ( BuB1142 ); ZFMK MYR7370 .
Other material examined
MYANMAR • 1 ♂; same collection data as for holotype; in the collection of Patrick Müller ( BuB1962 ) • 1 ♀; same collection data as for holotype; in the collection of Patrick Müller ( BuB1825 ) .
Description
HABITUS. At least up to 46 +6 (holotype, ZFMK-MYR7369) body rings ( Fig. 1A View Fig ) (ZFMK-MYR7370 = 42 +3; BuB1825 = 40 +4; BuB1962 = 45 +4); body cylindrical, slender, up to at least 14.7 mm long, diameter 0.5 mm, males smaller. Colour light to dark brown, posterior margin of metazonites light grey.
HEAD.As wide as collum and body ring 6 onwards, wider than body ring 2–5 ( Fig. 1B–C View Fig ). Labrum and front of head with setae ( Fig. 1D View Fig ). 32/21 ommatidia (21 probably an artefact) arranged in circular patch. Incisura lateralis present, closed. Antennae reaching to posterior margin of body ring 4, with 7 antennomeres, covered by setae, 6>3>4=5>1> 2>7, with four apical sensory cones. Antennomeres 5 and 6 broader ( Fig. 1D View Fig ). Labrum tridentate. Mandible base divided into small cardo and large stipes ( Fig. 1C–D View Fig ). Gnathochilarium with eumentum and promentum, stipes along whole length of gnathochilarium, lamella lingualis not completely separated by promentum, not reaching to eumentum.
TRUNK. Collum only slightly curved, projecting over posterior margin of head ( Fig. 1B–D View Fig ). Collum with small triangular process projecting ventrally, reaching to height of upper margin of mandibular base, with 2 striae touching anterior forming a V ( Fig. 1D View Fig ). Body rings totally fused from body ring 5 onwards. Anterior four body rings with sternites free from pleuro-tergites. Prozonite separated from metazonite by constriction. Metazonite from body ring 6 onwards distinctly arched and wider than prozonite ( Fig. 1C View Fig ). Prozonite ventrally with net-like ornamentation ( Fig. 1F View Fig ). Metazonite ventrally with up to 7 longitudinal striae ( Fig. 1F View Fig ). Posterior margin of metazonites with 2–3 rows of setae ( Fig. 1D View Fig ). Ozopores from body ring 6 onwards lateral on metazonite, at middle height of body ring ( Fig. 1B View Fig ). Midbody rings (9) ca 0.7 times as long as diameter.
LEGS. First two leg pairs surrounded by first pleuro-tergite (collum), leg pair 3 surrounded by 2 nd pleurotergite close to 3 rd pleuro-tergite, body rings 3 and 4 seemingly legless, from body ring 5 onwards 2 leg pairs per body ring ( Fig. 1B–C View Fig ). Midbody legs with coxa, prefemur, femur, postfemur, tibia, tarsus. Tarsus> prefemur = femur> postfemur> tibia> coxa. Podomeres with few setae. Tarsus with tarsal claw and accessory spine ( Fig. 1E View Fig ). Leg pairs 1 and 2 without accessory spine. Coxa of 2 nd leg pair inserts medial of coxa of 1 st leg pair.
POSTERIOR BODY RINGS. Preanal ring without epiproct projecting, with 5 longitudinal lateral grooves and setae.Anal valves with at least 10 marginal setae and up to 8 setae on surface. Subanal scale not projecting over anal valve. Posterior 3–6 body rings legless ( Fig. 1A View Fig ).
MALE SEXUAL CHARACTERS. Smaller and more slender than females ( Figs 1A View Fig , 2A View Fig vs Fig. 2B–C View Fig ). In male 1 st leg pair present, reduced in size not in segmentation, without tarsal claw. Penis with wide base and curved tip, with short setae ( Fig. 1D View Fig ). Anterior (8 th leg) and posterior gonopod (9 th leg) well-developed, on body ring 7 ( Fig. 1B–C View Fig ). Anterior gonopod coxite flat with two rounded apical lobes (inner and outer lobe), telopodite as long as inner coxal lobe, inserting at base of coxa, with few setae. Presence of flagellum unknown. Posterior gonopod as long as anterior gonopod, with rounded tip. Apex curved anteriorly, creating an open channel. Anterior surface with possible remnant of seminal groove reaching up to apex ( Fig. 1G–H View Fig ).
FEMALE SEXUAL CHARACTERS. Larger and wider than male ( Fig. 2B–C View Fig ). First leg pair reduced in length and broadened. Vulva not sufficiently preserved for description.
Remarks
Electrocambala ornata gen. et sp. nov. was discovered in one case (ZFMK MYR7370) in the same amber stone as a specimen of Electrocambala cretacea gen. et sp. nov. described below, showing that both species lived in temporal and geographical sympatry, not unlike recent species of the Cambalopsidae in SE Asia (e.g., Likhitrakarn et al. 2020).
Measurements and taphonomy
ZFMK-MYR7369
AMBER DESCRIPTION.Amber flat, semi-circle, 15.45 × 6.6 × 2.84 mm, polished, yellow, clear transparent.
SYNINCLUSIONS. Soil particles, stellate hairs, plant parts, Acari.
TAPHONOMIC FEATURES. Body curved as in defence ( Fig. 1A View Fig ). Defence fluid released from anterior body rings, form transparent dark brown bubbles above ozopores ( Fig. 1B View Fig ). Field of ommatidia damaged on left side. Gonopods everted ( Fig. 1B View Fig ). Anal-valves open ( Fig. 1A View Fig ). Body laterally slightly flattened. Body rings 26–38 damaged on right side and from leg pair 10 onwards right leg missing (artefact from polishing) ( Fig. 1A View Fig ).
ZFMK-MYR7370
MEASUREMENTS. 14.5 mm long, 0.5 mm in diameter.
AMBER DESCRIPTION. Amber flat, oval-shaped, 48.3 × 29.5 × 7.4 mm, polished, yellow, reddish transparent.
SYNINCLUSIONS. Soil particles, sporangia of fungi, bark, wood fibre, leaves, Diptera, Coleoptera, Electrocambala cretacea gen. et sp. nov., small brown droplets.
TAPHONOMIC FEATURES. Anterior body coiled as in defence ( Fig. 2C View Fig ). Field of ommatidia visible, but single ommatidia not distinguishable. Setation only partially preserved. Legs only partially preserved, mostly decayed ( Fig. 2C View Fig ). Vulva visible, but poorly preserved. Surrounded by brownish film.
BuB1825
MEASUREMENTS. 14.7 mm long, 0.5 mm in diameter.
AMBER DESCRIPTION.Amber flat, semi-circle, 18.23 × 9.09 × 4.05 mm, polished, yellow to reddish, clear transparent, with fissures.
SYNINCLUSIONS. Sporangia of fungi, stellate hairs.
TAPHONOMIC FEATURES. Anterior body bent as in defence. Secretion of defence fluid ( Fig. 2B View Fig ). Setation not preserved. Legs only partially preserved ( Fig. 2B View Fig ). Characters partly obscured by body. Amber with fissure.
BuB1962
MEASUREMENTS. 11.9 mm long, 0.3 mm in diameter.
AMBER DESCRIPTION. Amber cuboid, 12.28 × 5.57 × 3.29 mm, polished, yellow, clear transparent. From larger piece, includes 5 pieces.
SYNINCLUSIONS. Soil particles, sporangia of fungi, stellate hairs, parts of arthropod appendages.
TAPHONOMIC FEATURES. Anterior body bent as in defence ( Fig. 2A View Fig ). Head damaged, antennae deformed, legs only partially preserved ( Fig. 2A View Fig ), anal valves of preanal ring missing, body rings 9–12 and 21–31 damaged.
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